STUDY ON THE DESIGN PROCEDURE OF GEOTHERMAL HEAT PUMPS: GEOTHERMAL HEAT PUMP SYSTEM WITH

Size: px
Start display at page:

Download "STUDY ON THE DESIGN PROCEDURE OF GEOTHERMAL HEAT PUMPS: GEOTHERMAL HEAT PUMP SYSTEM WITH"

Transcription

1 STUDY ON THE DESIGN PROCEDURE OF GEOTHERMAL HEAT PUMPS: GEOTHERMAL HEAT PUMP SYSTEM WITH DIFFERENT TYPES OF GROUND HEAT EXCHANGERS G. Yoon *1, K. Nakazawa *, H. Niwa *, H. Kitora *, M. Okumiya *1 *1 Nagoya Univ., Furou-cho, Chikusa-ku, Nagoya, Aichi, Japan Tel: * Kansai Elect. Power Co., Inc. * NIKKEN SEKKEI Research Institute ABSTRACT In order to promote the adoption of geothermal heat pump systems, it is important to reduce the initial cost of the system. Therefore, a construction method for embedding heat exchange pipes in advance in order to the initial cost is under active development. However, in many cases these development methods are restricted by the structure of the building. When it is necessary to install more ground heat exchangers than the number of exchangers supported by the development method, it is considered that the combined utilization of different types of ground heat exchangers is a useful technique. Aiming at designing a geothermal heat pump system composed of water source heat pump equipment and several different types of GHEs, the design progress and the design support charts for such a system are presented in this paper. 1. INTRODUCTION A geothermal heat pump system consists of water source heat pump equipment and ground heat exchangers which can extract and inject heat from/into the ground. Through the process of heat extraction and injection from/into the ground, efficient operation is attained as compared to air source heat pumps. For this reason, such systems are attractive from the point of view of energy conservation measures. Moreover, since the release of heat into the air can be suppressed, it is expected that GHEs can be used as an effective measure against thermal pollution in urban areas and heat islands. Although it is a comparatively simple system, the initial cost of implementing a geothermal heat pump system is considerably high due to the cost of drilling a borehole in which the heat

2 exchange pipes are inserted. Therefore, the reduction of this initial cost is a major issue when considering the promotion of such systems. One of the most common types of ground heat exchangers is the borehole type, which involves drilling a borehole into the ground, inserting the heat exchange pipes and filling up the hole. This type of GHE is characterized by the comparatively high cost of drilling the hole (Rybach, Eugster et al. 199). In order to reduce the drilling cost for GHEs, a construction method which embeds heat exchange pipes in advance is under active development. In this regard, a construction method based on using the cast-in-place foundation and soil mixing wall (SMW) techniques for buildings is proposed (Gao, Zhang et al. 8). However, these development methods are often limited by constraints related to the installation of the system, which are imposed by the size or the shape of the building. For example, the number of GHEs which can be installed is restricted by the number and the depth of the foundation piles, the spacing between the piles, as well as the length of the SMW. In order to install a heat pump which corresponds to the heat demand of the HVAC system for a particular building, it is considered that the combined application of different types of GHEs and borehole types can yield high efficiency. Moreover, when combined application is considered, it is thought that more suitable combinations exist from the viewpoint of cost performance. In this paper, the design procedures for a ground heat exchanger based on the combined application of different types of ground heat exchangers is introduced and discussed.. OUTLINE OF SUBJECT SYSTEM Figure 1 shows the layout of the subject system in this study. This system consists of water source heat pump equipment and multiple GHEs. Heat Pump C/E E/C Water thermal Ground heat exchanger SMW C.P Foundation Borehole Figure 1: Layout of subject system We assume that the three different types of GHEs shown in Table 1 are coupled with a heat pump. The popular borehole-type GHE consists of two U-shaped tubes made of PVC which are inserted into a borehole. In addition, GHEs of the SMW type use the soil mixing wall technique to fix the U-shaped tube in place in order to reduce the cost of drilling a hole. The

3 last method involves the utilization of cast-in-place concrete foundation piles. These GHEs are coupled in parallel with heat pump equipment. A more detailed description is presented in Section.. Tab le 1: Three types of ground heat exchangers Borehole type SMW type C.P pile foundation type Diagram m Depth:m Depth:8m Depth:m Dimension s per 1 unit Depth : 8 m Two U-shaped tubes Depth : m Two serially connected loops Depth : m Eight U-shaped tubes. DESIGN PROCESS OF GEO-HP SYSTEM.1 DESCRIPTION OF DESIGN PROCESS The design process for a geothermal heat pump system combining different types of GHEs is presented below. Step 1: Determine the heat load The heat load of the Geo-HP system is determined by the full or partial heat load of the building. After the heat load has been determined, it is possible to select the capacity of the heat pump equipment. Also, at this stage, it is recommended that a rough estimate of the installation cost is prepared and the maximum number of GHEs which can be installed with regard to the restrictions imposed by the building is determined. Step : Determine the design index, the annual COP, and the cooling or heating seasons It is desirable that the target COP of the Geo-HP system is equal to or greater than that of an air source heat pump system. Step : Design a combination of GHEs Determine the combination of GHEs to be coupled with a heat pump in order to satisfy the target COP. The selected system should be the cheapest one among the considered cases. If there is no combination satisfying the target COP, the progress should go back to the first stage and the heat load of the GHE-HP should be re-determined. Step : Verify the designed system Confirm practical COP of the selected combination of GHEs by using an appropriate technique, such as numerical simulation.

4 However, at the step of the abovementioned design process, the most appropriate combination cannot be determined in a simple manner. Therefore, it is necessary to develop a simple method which can be used for determining the most appropriate combination of GHEs.. SIMULATON MODEL FOR GEO-HP SYSTEMS..1 HEAT PUMP MODEL Input and Output per rating power of HP (kw/kw) Input and Output per rating power of HP (kw/kw) Hot Hot water: Chilled Chilled water: OUTPUT 99 INPUT COP Heat source water temperature ( ) 1 Heat source water temperature ( ) COP of HP (-) COP of HP (-) Operation in heating mode Output:Q =.9 * Tw + 1. (1) Power:W =. * Tw () Operation in cooling mode Output:Q = - 1. * Tw () Power:W =.9 * Tw +.8 () Here, Tw is the temperature of the water heat source at the outlet of the GHEs Figure : Performance of heat pump equipment It is assumed that the heat pump equipment is operated in rated output mode with a constant volume of the water (ethylene glycol solution, %wt.) heat source and the heated/cooled water. The operation of the HP is simulated by using the performance curve shown in Figure. By computing the output and the power of the HP with the temperature of the water heat source at the outlet of the GHEs, the change in operating efficiency caused by the water heat source flowing from GHEs into the HP can be considered... GROUND HEAT EXCHANGER MODEL The three types of GHEs presented above are modeled as shown in Figure. Although each type of GHE involves U-shaped tubes made of circular PVC pipes with a diameter of mm, the shape of the cross-section of the U-shaped tube was converted into a rectangular one for the sake of simplifying the model and the simulations (Yoon et al., ). Also, the conversion was conducted in such a way as to avoid changes in the heat transfer area and the water flow rate of the pipes. In addition, although the eight of U-shaped tubes are arranged in a circular enclosure in a C.P. pile foundation with a diameter of. m, the model was constructed by arranging the U-shaped tubes in a rectangular formation, with the result that the distance between the tubes was changed a little. Except in the case of SMW, the ground surrounding the GHEs was modeled as a calculation domain in the shape of a rectangular parallelepiped which is m wide in both horizontal directions and 1 m deep as shown in Figure.

5 1.m.m y x.8m Machine room Borehole SMW C.P. foundation Figure : Models of the three types of GHEs The boundary condition for all side is adiabatic condition except top and bottom side which are corresponded to ground surface and underground at 1 m deep. The formulas of the heat balance in the calculation domain and at the ground surface are shown below. It is considered that solar radiation and long-wavelength radiation. And the bottom side is assumed being kept at annual mean outdoor air temperature constantly. The effective heat conductivity of the ground at a depth of 1 m is 1. W/mK, and the effective heat capacity is, kj/m K. There is gap between the amount of heat rate for injection and extraction into/to ground, however we could confirmed previours study that the periodic steady was achieved after three years of operation for this kind of system. Heat balance in the ground θ s θs θs θs 1m c = + + sρ s λ 1) s t x y z y Heat balance at the ground surface x θ s z λs z= = α ss ( θ ss θo ) + aj εdn ) m y m Figure : Calculation domain The calculation domain for the ground in the case of the SMW type was assumed to be m wide in x-direction since the distance between the U-shaped tubes was adjusted to m. Also, one side of the calculation domain was assumed to face a facility room at a distance of.8 m, where the air temperature inside the facility room was assumed to be ºC higher than the outdoor air temperature at any time. Ground surface BHE.. CALCULATION PROCESS The calculation process is shown in Figure. After computing the temperature of the water heat source at the outlet of each GHE, the temperature of the water heat source flowing into the HP equipment is calculated by weight averaging the water temperature at the outlet of each GHE. Then, the power and the output of the HP can be calculated from the temperature of the water heat source by using the operation performance of the HP equipment. After this, the temperature of the water heat source flowing back to the GHEs can be calculated and the

6 resulting value can be used for the GHE calculation module. The temperature of the water heat source is set between -1 ºC and ºC. If the temperature of the water heat source is outside this range, HP is stopped. The simulations were conducted under the conditions mentioned above. After the preliminary simulations were conducted, all of the simulations were conducted with respect to the period between May 1 and April. The HP operates in cooling mode between May 1 and Oct 1 and in heating mode between Dec 1 and April. The HP does not operate in November. Also, the HP operates eight hours per day between 1:~1:9, with the exception of holidays. Compute heat source water temp. compute Tout Time Step 1min. Calculate output, Q and input W Q<Qcap no W=W (Qcap/Q) and Q=Qcap yes Compute Qrad, Qabs Qrad=Qc+Wc Qabs=Qh-Wh Compute Tin Tin=Tout+ T T=(Qrad or Qabs)/CpV c:cooling h:heating Tout:Temp.of at outlet Tin:Temp.of GHE at inlet Qcap:Rating output Qrad:Inject rate Qabs:Extract rate Cp:specific heat (kj/m K) V:Heat source water rate(m /h) Figure : Calculation process With the numerical model mentioned above, the HP system coupled with a single GHE was simulated in order to prepare the design charts as shown in Figure, which are needed for design a combination of GHEs. Then, the heat transfer rate of the GHE per unit, the seasonal mean water temperature at the GHE outlet, and the COP of the HP were computed and plotted in these charts.. EXAMPLE OF GEO-HP SYSTEM DESIGN AND ITS VALIDATION In this section, example of design progress for the combination GHEs would be described under the case of design conditions shown in Table. Table : Design Conditions for Example Capacity GeoHP Heat source water flow rate Maximum number of GHEs can be installed Installing cost Goal of sys. COP of GeoHP RT lit/min( T= ) Borehole:no limited SMW:up to units, C.P. foundation:up to units SMW < C.P. Foundation < Borehole Cooling season COP:. Heating season COP:.

7 Step 1: Determining the heat load The heat load which should be applied to the Geo-HP system is RT. Step : Determine the design index, the annual COP, and the cooling or heating seasons Required COP is. in cooling season and. in heating season Step : Designing a combination of GHEs First, as shown in Figure, the water flow velocity can be determined from the line corresponding to a COP of.. This example shows that the water flow velocity of the borehole type is about.1 m/s for the borehole type,. m/s for the SMW type, and. m/s for the C.P. type, where the water flow rate becomes 1. L/min, 8.8 L/min, and. L/min, respectively. Also, the seasonal mean water temperature of the three types of GHEs is shown in the figure. Since the water temperature of each GHE is almost the same (. ºC), it can be said that these GHEs coupled in parallel with HP equipment can produce water with a temperature of about. ºC for the cooling season. This indicates that the system can satisfy the target COP for the cooling season. Furthermore, the seasonal mean water temperature can be obtained by drawing a vertical line from the crossing point of the water flow velocity and the COP line. The values thus determined are.9,., and. ºC, where the seasonal mean COP becomes.,.8, and., respectively) Accordingly, the seasonal mean temperature of the water flowing into the HP remains at.9 ~. ºC, and the mean COP for the heating season remains at.~.8. Borehole 1 SMW 1 C.P. foundation 1 Can obtain Water temperature at outlet of GHE on season 1Design C.S. COP Mean COP( ) Cooling Heating Annual Velocity (m/s) Water flow rate per unit(l/min) Mean COP( ) Figure : Example of using the design charts Cooling Heating Annual Velocity (m/s) Water flow rate per unit(l/min) Cooling Heating Annual Velocity (m/s) Water flow rate per unit(l/min) Water flow rate for a GHE 1. lit/min 8.8 lit/min. lit/min Mean COP( ) As a result, the water flow rate of per unit for each type of GHE was determined at 1.L/min, 8.8 L/min, and. L/min, respectively, where the water flow rate for each GHE must satisfy the following equations.

8 V total =V borehole +V SMW +V CPpile ) V total =1.*N borehole +8.8*N SMW +.*N CPpile ) Here, V total is the flow rate of the water heat source ( L/min) which was necessary for the HP in this case. N is the respective number of units for each type of GHE. It is considered that the maximum number of allowable GHE units of the SMW and C.P. foundation pile type should be used, and GHE units of the borehole type should be used only for remainder of the necessary number of GHEs. Consequently, from the number of SMW and C.P. foundation pile GHE units, it was determined that the necessary number of borehole GHE units is. Step : Verifying the designed system Practical COP of this designed system was simulated by numerical analysis model as shown in Figure. The mean COP was. for the cooling season and. for the heating season. The results showed that the designed combined system of GHEs satisfies the target COP. COP of HP (-) May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. Jan. Feb. Mar. Apr. Figure : Simulation results of Practical system COP. CONCLUSION Using a combination of different types of GHEs is an efficient technique for reducing the initial cost of Geo-HP systems. In this paper, the design process and the design charts for determining the most appropriate combination of GHEs were presented for the case where a combination of different types of GHEs can be used for achieving the desired performance. REFERENCES Gao, J., X. Zhang, et al. (8). "Thermal performance and ground temperature of vertical pile-foundation heat exchangers: A case study." Applied Thermal Engineering 8(1-18): 9-. Rybach, L., W. J. Eugster, et al. (199). "Borehole Heat Exchangers: Long-Term Operational Characteristics of a Decentral Geothermal Heating System." Geothermics 1(-): Yoon, G., Okumiya, M. et al., (). STUDY ON GHP SYSTEM WITH A VERTICAL EARTH PIPE HEAT EXCHANGER, ECOSTOCK, The Tenth International Conference on Thermal Energy Storage, Proceedings CD-ROM. NOMENCLATURE c : special heat [kj/kgk], ρ : density [kg/m ], θ : temperature [K], λ : thermal conductivity [W/mK], t : second [Sec.], J : intensity of solar radiation [W/m ], a : solar absorptivity [-], dn : nocturnal radiation [W/m ], α : heat transfer coefficient [W/m K], ɛ:emmisivity[-] -Subscript s : soil, ss : ground surface

Enhancement of Heat Exchange Capacity of Ground Heat Exchangers by Injecting Water into Wells

Enhancement of Heat Exchange Capacity of Ground Heat Exchangers by Injecting Water into Wells PROCEEDINGS, Thirty-Ninth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 24-26, 2014 SGP-TR-202 Enhancement of Heat Exchange Capacity of Ground Heat Exchangers

More information

OBJECT SYSTEM Figure 1 shows the object air conditioning system. Flesh outdoor air is supplied to desiccant system directly or via earth tube dependin

OBJECT SYSTEM Figure 1 shows the object air conditioning system. Flesh outdoor air is supplied to desiccant system directly or via earth tube dependin Study On Performance Evaluation And Modeling Of Temperature And Humidity Independent Control Of Air Conditioning System Based On Operation Data M. Ukai 1,*, H. Tanaka 2, M. Okumiya 1 and H. Tanaka 1 1

More information

Long-Term Heating Test Using the Semi-open Loop Ground Source Heat Pump System

Long-Term Heating Test Using the Semi-open Loop Ground Source Heat Pump System PROCEEDINGS, 44th Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 11-13, 2019 SGP-TR-214 Long-Term Heating Test Using the Semi-open Loop Ground Source Heat

More information

AN ANALYSIS OF THE FRESH AIR LOAD REDUCTION SYSTEM BY USING UNDERGROUND DOUBLE FLOOR SPACE FOR AIR CONDITIONING

AN ANALYSIS OF THE FRESH AIR LOAD REDUCTION SYSTEM BY USING UNDERGROUND DOUBLE FLOOR SPACE FOR AIR CONDITIONING AN ANALYSIS OF THE FRESH AIR LOAD REDUCTION SYSTEM BY USING UNDERGROUND DOUBLE FLOOR SPACE FOR AIR CONDITIONING Wontug Son*, Hideki Tanaka*, Hisaya Nagai*, Masaya Okumiya* and Nobuo Nakahara** Nagoya University*

More information

DEVELOPMENT OF A DESIGN AND PERFORMANCE PREDICTION TOOL FOR THE GROUND SOURCE HEAT PUMP SYSTEM

DEVELOPMENT OF A DESIGN AND PERFORMANCE PREDICTION TOOL FOR THE GROUND SOURCE HEAT PUMP SYSTEM /33 DEVELOPMENT OF A DESIGN AND PERFORMANCE PREDICTION TOOL FOR THE GROUND SOURCE HEAT PUMP SYSTEM T. Katsura * K. Nagano * S. Takeda * T. Ibamoto * S. Narita * Y.Nakamura *2 N. Homma *3 * Hokkaido University

More information

NUMERICAL STUDY ON THERMAL DEPLETION OF THE GROUND AROUND A GEOTHERMAL HEAT PUMP S PROBE

NUMERICAL STUDY ON THERMAL DEPLETION OF THE GROUND AROUND A GEOTHERMAL HEAT PUMP S PROBE U.P.B. Sci. Bull., Series C, Vol. 75, Iss. 3, 2013 ISSN 2286-3540 NUMERICAL STUDY ON THERMAL DEPLETION OF THE GROUND AROUND A GEOTHERMAL HEAT PUMP S PROBE Constantin IONESCU 1, Clément MONTANGE 2 Long

More information

Geothermal Energy for the Renewable Energy House

Geothermal Energy for the Renewable Energy House European Geothermal Energy Council Geothermal Energy for the Renewable Energy House Presentation for the Workshop on the Inauguration day, 22.3.2006 Dr. Burkhard Sanner President, EGEC Geothermal Energy

More information

Ground Coupled Heat Pump Systems a Key for a Sustainable Development of Heating and Cooling Buildings

Ground Coupled Heat Pump Systems a Key for a Sustainable Development of Heating and Cooling Buildings Ground Coupled Heat Pump Systems a Key for a Sustainable Development of Heating and Cooling Buildings GABRIEL V. BENDEA*, MARCELA F. PRADA**, CODRUTA C. BENDEA*, CALIN D.SECUI* Department of Energy Engineering

More information

EVALUATION OF DISTRIBUTION SYSTEM PERFORMANCE IN DISTRICT HEATING AND COOLING SYSTEM

EVALUATION OF DISTRIBUTION SYSTEM PERFORMANCE IN DISTRICT HEATING AND COOLING SYSTEM EVALUATION OF DISTRIBUTION SYSTEM PERFORMANCE IN DISTRICT HEATING AND COOLING SYSTEM Yoshiyuki SHIMODA *1, Minoru MIZUNO *1, Shigeki KAMETANI *2 and Shin-ichi KAWAMURA *3 *1 Osaka University, 2-1, Yamadaoka,

More information

Performance investigation of multiple-tube ground heat exchangers for ground-source heat pump

Performance investigation of multiple-tube ground heat exchangers for ground-source heat pump American Journal of Energy Engineering 14; (5): 13-17 Published online October 1, 14 (http://www.sciencepublishinggroup.com/j/ajee) doi: 1.11648/j.ajee.145.11 Performance investigation of multiple-tube

More information

NORTH AMERICAN MONITORING OF A HOTEL WITH ROOM SIZE GSHPS

NORTH AMERICAN MONITORING OF A HOTEL WITH ROOM SIZE GSHPS NORTH AMERICAN MONITORING OF A HOTEL WITH ROOM SIZE GSHPS Hugh I. Henderson, Jr. P.E.*, Steven W. Carlson, P.E., and Adam C. Walburger CDH Energy Corp. Cazenovia, NY USA ABSTRACT This paper presents the

More information

Innovative Solar thermal systems for heating and cooling

Innovative Solar thermal systems for heating and cooling Innovative Solar thermal systems for heating and cooling Warsaw 18 th June 2009 Panagiotis Tsekouras PhD Candidate Mechanical Engineer CRES - Solar Thermal Dept. Overview The HIGH COMBI project SC+ Symbolism

More information

ENERGY EVALUATION BY SIMULATION FOR EFFECTIVE USE OF SEWAGE HEAT

ENERGY EVALUATION BY SIMULATION FOR EFFECTIVE USE OF SEWAGE HEAT Proceedings of BS213: ENERGY EVALUATION BY SIMULATION FOR EFFECTIVE USE OF SEWAGE HEAT Toshihiko Sudo 1,Ryoichi Kajiya 2, Koji Sakai 2 1 Nikken Sekkei Research Institute, Japan 2 School of Science and

More information

Numerical and analytical analysis of groundwater influence on the pile ground heat exchanger with cast-in spiral coils

Numerical and analytical analysis of groundwater influence on the pile ground heat exchanger with cast-in spiral coils Available online at www.sciencedirect.com ScienceDirect Energy Procedia 61 (2014 ) 1784 1788 The 6 th International Conference on Applied Energy ICAE2014 Numerical and analytical analysis of groundwater

More information

Commissioning of a Coupled Earth Tube and Natural Ventilation System at the Post-Acceptance Step

Commissioning of a Coupled Earth Tube and Natural Ventilation System at the Post-Acceptance Step Eleventh International IBPSA Conference Glasgow, Scotland July 7-30, 009 Commissioning of a Coupled Earth Tube and Natural Ventilation System at the Post-Acceptance Step Song Pan 1, Mingjie Zheng 1, Harunori

More information

Heat exchanger performance of ground source heat pump by water cooling method

Heat exchanger performance of ground source heat pump by water cooling method Academia Journal of Environmetal Science 6(5): 121-128, May 2018 DOI: 10.15413/ajes.2018.0118 ISSN: ISSN 2315-778X 2018 Academia Publishing Research Paper Heat exchanger performance of ground source heat

More information

*Corresponding authors. Tel.: x415, address: (N. Zhu)

*Corresponding authors. Tel.: x415,  address: (N. Zhu) Optimal design of ground source heat pump system integrated with phase change cooling storage tank in an office building Na Zhu *, Yu Lei, Pingfang Hu, Linghong Xu, Zhangning Jiang Department of Building

More information

Dimensioning a small-sized PTC solar field for heating and cooling of a hotel in Almería (Spain)

Dimensioning a small-sized PTC solar field for heating and cooling of a hotel in Almería (Spain) Available online at www.sciencedirect.com Energy Procedia 30 (2012 ) 967 973 SHC 2012 Dimensioning a small-sized PTC solar field for heating and cooling of a hotel in Almería (Spain) Manuel Quirante a,

More information

DESIGN OF VAPOUR ABSORPTION REFRIGERATION SYSTEM OF 1.5TR CAPACITY BY WASTE HEAT RECOVERY PROCESS

DESIGN OF VAPOUR ABSORPTION REFRIGERATION SYSTEM OF 1.5TR CAPACITY BY WASTE HEAT RECOVERY PROCESS Volume 115 No. 7 2017, 613-619 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu ijpam.eu DESIGN OF VAPOUR ABSORPTION REFRIGERATION SYSTEM OF 1.5TR CAPACITY

More information

New developed solar thermal systems for heating and cooling Budapest, 16 th April 2009 Tsekouras Panagiotis Mech. Engineer NTUA Centre for Renewable

New developed solar thermal systems for heating and cooling Budapest, 16 th April 2009 Tsekouras Panagiotis Mech. Engineer NTUA Centre for Renewable New developed solar thermal systems for heating and cooling Budapest, 16 th April 2009 Tsekouras Panagiotis Mech. Engineer NTUA Centre for Renewable Energy Sources Solar Thermal Dept. Overview Solar Thermal

More information

RETRO-COMMISSIONING OF A HEAT SOURCE SYSTEM IN A DISTRICT HEATING AND COOLING SYSTEM Eikichi Ono 1*, Harunori Yoshida 2, Fulin Wang 3 KEYWORDS

RETRO-COMMISSIONING OF A HEAT SOURCE SYSTEM IN A DISTRICT HEATING AND COOLING SYSTEM Eikichi Ono 1*, Harunori Yoshida 2, Fulin Wang 3 KEYWORDS Eleventh International IBPSA Conference Glasgow, Scotland July 7-, 9 RETRO-COMMISSIONING OF A HEAT SOURCE SYSTEM IN A DISTRICT HEATING AND COOLING SYSTEM Eikichi Ono *, Harunori Yoshida, Fulin Wang KAJIMA

More information

Field Test of Horizontal Ground Heat Exchangers Installed Using Horizontal Directional Drilling Technology

Field Test of Horizontal Ground Heat Exchangers Installed Using Horizontal Directional Drilling Technology PROCEEDINGS, 44th Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 11-13, 2019 SGP-TR-214 Field Test of Horizontal Ground Heat Exchangers Installed Using

More information

German American Chamber of Commerce PRESENTATION ON NOVEMBER 6th, 2008 Axel Popp

German American Chamber of Commerce PRESENTATION ON NOVEMBER 6th, 2008 Axel Popp German American Chamber of Commerce PRESENTATION ON NOVEMBER 6th, 2008 Axel Popp www.rehau.de Constructcion Automotive Industry WHO IS REHAU UNLIMITED POLYMER SOLUTIONS We are daily redefining the limits

More information

Modeling and analyzing solar cooling systems in Polysun

Modeling and analyzing solar cooling systems in Polysun Modeling and analyzing solar cooling systems in Polysun Seyed H. Rezaei (seyed.rezaei@velasolaris.com) 1 Andreas Witzig (andreas.witzig@velasolaris.com) 1 Michael Pfeiffer (michael.pfeiffer@velasolaris.com)

More information

Energy from the Earth. Geothermal Two very different methods Tides, waves, currents. Unit 12 Energy from the earth - Slide 1

Energy from the Earth. Geothermal Two very different methods Tides, waves, currents. Unit 12 Energy from the earth - Slide 1 Energy from the Earth Geothermal Two very different methods Tides, waves, currents Unit 12 Energy from the earth - Slide 1 Remember efficiency e = What you want out What you had to put in Electrical energy

More information

Modeling a Novel Shallow Ground Heat Exchanger

Modeling a Novel Shallow Ground Heat Exchanger Modeling a Novel Shallow Ground Heat Exchanger Michele Bottarelli* 1, Marco Bortoloni 1 1 Università degli Studi di Ferrara, Dipartimento di Architettura, Ferrara, Italia *Corresponding author: via Quartieri,

More information

OPTIMAL OPERATING METHOD FOR A HEAT SOURCE SYSTEM CONSIST OF CENTRIFUGAL CHILLERS

OPTIMAL OPERATING METHOD FOR A HEAT SOURCE SYSTEM CONSIST OF CENTRIFUGAL CHILLERS Numbers of Abstract/Session (given by NOC) - 1 - OPTIMAL OPERATING METHOD FOR A HEAT SOURCE SYSTEM CONSIST OF CENTRIFUGAL CHILLERS Satoshi, Nikaido, Centrifugal & Absorption Chiller Department, Air-Conditioning

More information

Thermal Performances Of Three Types Of Ground Heat Exchangers In Short-Time Period Of Operation

Thermal Performances Of Three Types Of Ground Heat Exchangers In Short-Time Period Of Operation Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2010 Thermal Performances Of Three Types Of Ground Heat Exchangers In Short-Time

More information

First Thermal Response Test in Libya Abstract 1. Introduction 2. Background

First Thermal Response Test in Libya Abstract 1. Introduction 2. Background Abstract First Thermal Response Test in Libya Eng. Adel A. Eswaisi Al-Fateh Univ.Tripoli-Libya Email: swesi00@yahoo.com Prof. M. A. Muntasser Al-Fateh Univ.Tripoli-Libya Email: info@ief-ngo.org. Prof.

More information

Performance of a Solar Heating System with Photovoltaic Thermal Hybrid Collectors and Heat Pump

Performance of a Solar Heating System with Photovoltaic Thermal Hybrid Collectors and Heat Pump Performance of a Solar Heating System with Photovoltaic Thermal Hybrid Collectors and Heat Pump Mark Dannemand, Technical University of Denmark, Department of Civil Engineering, Denmark Simon Furbo, Technical

More information

D DAVID PUBLISHING. Efficiency of Combined Solar Thermal Heat Pump Systems. 1. Introduction. 2. Solar Thermal and Heat Pump Systems

D DAVID PUBLISHING. Efficiency of Combined Solar Thermal Heat Pump Systems. 1. Introduction. 2. Solar Thermal and Heat Pump Systems Journal of Civil Engineering and Architecture () - doi:./-/.. D DAVID PUBLISHING Efficiency of Combined Solar Thermal Heat Pump Systems Werner Lerch, Andreas Heinz, Richard Heimrath and Christoph Hochenauer

More information

ENERGY SAVING OF AIR-CONDITIONING IN MASS MERCHANDISERS BY OPERATIONAL CHANGE OF AIR-CONDITIONING SYSTEM

ENERGY SAVING OF AIR-CONDITIONING IN MASS MERCHANDISERS BY OPERATIONAL CHANGE OF AIR-CONDITIONING SYSTEM Numbers of Abstract/Session (given by NOC) - 1 - ENERGY SAVING OF AIR-CONDITIONING IN MASS MERCHANDISERS BY OPERATIONAL CHANGE OF AIR-CONDITIONING SYSTEM Masafumi Hirota, Professor, Department of Mechanical

More information

Energy Efficient Heat Pump System Applied Short Term and Seasonal Thermal Energy Storage Part 1 Design concept of the system

Energy Efficient Heat Pump System Applied Short Term and Seasonal Thermal Energy Storage Part 1 Design concept of the system Energy Efficient Heat Pump System Applied Short Term and Seasonal Thermal Energy Storage Part 1 Design concept of the system H. Wakayama NIHON SEKKEI,INC.KYUSYU BRANCH Fukuoka, 810-0001 Japan Tel: +81-92-712-5629

More information

COMPARATIVE SUMMER THERMAL AND COOLING LOAD PERFORMANCE OF NATURAL VENTILATION OF CAVITY ROOF UNDER THREE DIFFERENT CLIMATE ZONES

COMPARATIVE SUMMER THERMAL AND COOLING LOAD PERFORMANCE OF NATURAL VENTILATION OF CAVITY ROOF UNDER THREE DIFFERENT CLIMATE ZONES COMPARATIVE SUMMER THERMAL AND COOLING LOAD PERFORMANCE OF NATURAL VENTILATION OF CAVITY ROOF UNDER THREE DIFFERENT CLIMATE ZONES Lusi Susanti 1, Hiroshi Matsumoto 2, and Hiroshi Homma 2 1 Department of

More information

Aalborg Universitet. CLIMA proceedings of the 12th REHVA World Congress volume 9 Heiselberg, Per Kvols. Publication date: 2016

Aalborg Universitet. CLIMA proceedings of the 12th REHVA World Congress volume 9 Heiselberg, Per Kvols. Publication date: 2016 Downloaded from vbn.aau.dk on: marts 22, 19 Aalborg Universitet CLIMA 16 - proceedings of the 12th REHVA World Congress volume 9 Heiselberg, Per Kvols Publication date: 16 Document Version Publisher's

More information

POTENTIAL FOR THE ENERGY EFFICIENCY ADVANCEMENT IN DISTRICT HEATING AND COOLING PLANT BY RENOVATION

POTENTIAL FOR THE ENERGY EFFICIENCY ADVANCEMENT IN DISTRICT HEATING AND COOLING PLANT BY RENOVATION Eleventh International IBPSA Conference Glasgow, Scotland July 27-30, 2009 POTENTIAL FOR THE ENERGY EFFICIENCY ADVANCEMENT IN DISTRICT HEATING AND COOLING PLANT BY RENOVATION Yoshiyuki Shimoda, Yoshitaka

More information

EXPERIMENT FOR VERIFICATION OF GROUND SOURCE HEAT PUMP USING THE DIRECT EXPANSION METHOD

EXPERIMENT FOR VERIFICATION OF GROUND SOURCE HEAT PUMP USING THE DIRECT EXPANSION METHOD EXPERIMENT FOR VERIFICATION OF GROUND SOURCE HEAT PUMP USING THE DIRECT EXPANSION METHOD S. ISHIGURO 1 and T. TAKEDA 2 1 Graduate School of Medicine and Engineering, Univ. of Yamanashi, Takeda 4-3-11,

More information

Application of Geothermal Heat Pump (GeoHP) System at ultra cold area : Changchun city, China

Application of Geothermal Heat Pump (GeoHP) System at ultra cold area : Changchun city, China Application of Geothermal Heat Pump (GeoHP) System at ultra cold area : Changchun city, China Shinji Takasugi, Ken Ikeuchi, Takashi Kuwano and Chihiro Takahashi JMC Geothermal Engineering Co. Ltd. (Geo-E)

More information

Solar Flat Plate Thermal Collector

Solar Flat Plate Thermal Collector Solar Flat Plate Thermal Collector 1 OBJECTIVE: Performance Study of Solar Flat Plate Thermal Collector Operation with Variation in Mass Flow Rate and Level of Radiation INTRODUCTION: Solar water heater

More information

A New Type of Hybrid Groundwater Energy System

A New Type of Hybrid Groundwater Energy System This case-history is about: A New Type of Hybrid Groundwater Energy System by Todd Giddings, Ph.D., P.G. My 10,000 square foot office building Located in State College, PA (5,600 hdd s) Constructed in

More information

A Method for On-Going Commissioning of VRV Package Systems Using a. Simulation Model

A Method for On-Going Commissioning of VRV Package Systems Using a. Simulation Model A Method for On-Going Commissioning of VRV Package Systems Using a Simulation Model Motoi Yamaha Ken Sekiyama Shinya Misaki Associate Professor Graduate Student Chubu University Chubu University Sunloft

More information

Building Commissioning for Energy Efficiency and Comfort, Vol.VI-8-4

Building Commissioning for Energy Efficiency and Comfort, Vol.VI-8-4 Continuous Energy Management of the HVAC&R System in an Office Building System Operation and Energy Consumption for Eight Years after Building Completion Yasunori Akashi Masahiro Shinozaki Ryoko Kusuda

More information

Go Green Go Geothermal

Go Green Go Geothermal Go Green Go Geothermal What We ll Cover Today Market Status Current Status Growth Potential System Advantages and Disadvantages Competing Technologies Case Studies Lessons Learned Feasibility of Geothermal

More information

Design and optimization of solar water heating system for a five star hotel in Varanasi

Design and optimization of solar water heating system for a five star hotel in Varanasi Design and optimization of solar water heating system for a five star hotel in Varanasi Mahesh Vipradas & Amit Kumar Tata Energy Research Institute, Darbari Seth Block, Habitat Place, Lodhi Road, New Delhi

More information

COMPARISONS BETWEEN TRNSYS SOFTWARE SIMULATION AND F-CHART PROGRAM ON POOL HEATING SYSTEM

COMPARISONS BETWEEN TRNSYS SOFTWARE SIMULATION AND F-CHART PROGRAM ON POOL HEATING SYSTEM ESL-TR-12-4-3 COMPARISONS BETWEEN TRNSYS SOFTWARE SIMULATION AND F-CHART PROGRAM ON POOL HEATING SYSTEM Chunliu Mao Juan-Carlos Baltazar, Ph.D., P.E. Jeff Haberl Ph.D., P.E. April 212 TABLE OF CONTENTS

More information

EVALUATION OF THE IMPACT OF NEW RESIDENTIAL WATER HEATER DISSEMINATION BY A RESIDENTIAL ENERGY END-USE MODEL

EVALUATION OF THE IMPACT OF NEW RESIDENTIAL WATER HEATER DISSEMINATION BY A RESIDENTIAL ENERGY END-USE MODEL Proceedings of BS15: 14th Conference of International Building Performance Simulation Association, Hyderabad, India, Dec. 7-9, 15. EVALUATION OF THE IMPACT OF NEW RESIDENTIAL WATER HEATER DISSEMINATION

More information

Comparative Heating Performances of Ground Source and Air Source Heat. Pump Systems for Residential Buildings in Shanghai

Comparative Heating Performances of Ground Source and Air Source Heat. Pump Systems for Residential Buildings in Shanghai Comparative Heating Performances of Ground Source and Air Source Heat Pump Systems for Residential Buildings in Shanghai Zhaohui Liu 1,2, Hongwei Tan 1,2,3* 1 School of Mechanical Engineering, Tongji University,

More information

Geothermal Heat Pumps: Harnessing On-Site Renewable Energy to Meet Energy-Efficiency and Climate Change Goals

Geothermal Heat Pumps: Harnessing On-Site Renewable Energy to Meet Energy-Efficiency and Climate Change Goals Geothermal Heat Pumps: Harnessing On-Site Renewable Energy to Meet Energy-Efficiency and Climate Change Goals Daniel Ellis President ClimateMaster, Inc. Oklahoma City dellis@climatemaster.com www.climatemaster.com

More information

Rainwater tank study of new homes

Rainwater tank study of new homes Rainwater tank study of new homes Helena Amaro UWSRA Science & Stakeholder Engagement Forum #4 The objectives Determine the quantity of water savings from rainwater tanks Identify opportunities to improve

More information

THERMAL CHARACTERISTICS AND ENERGY CONSERVATION MEASURES IN AN INDOOR SPEED-SKATING ARENA

THERMAL CHARACTERISTICS AND ENERGY CONSERVATION MEASURES IN AN INDOOR SPEED-SKATING ARENA Proceedings of Building Simulation 2: THERMAL CHARACTERISTICS AND ENERGY CONSERVATION MEASURES IN AN INDOOR SPEED-SKATING ARENA Junta Matsuo, Tatsuo Nagai, Akio Sagae 2, Michihiko Nakamura, Shotaro Shimizu,

More information

Introduction of energy savings by CO2 refrigeration systems in SM/CVS. Feb. 3 rd 2014 Panasonic Corporation Air-Conditioner Division Gaku Shimada

Introduction of energy savings by CO2 refrigeration systems in SM/CVS. Feb. 3 rd 2014 Panasonic Corporation Air-Conditioner Division Gaku Shimada Introduction of energy savings by CO2 refrigeration systems in SM/CVS Feb. 3 rd 214 Panasonic Corporation Air-Conditioner Division Gaku Shimada AGENDA 1. CO2 Compressor and Application Roadmap 2. Introduction

More information

DIRECTIONAL-BORE GROUND SOURCE HEAT PUMP FIELD REPORT

DIRECTIONAL-BORE GROUND SOURCE HEAT PUMP FIELD REPORT PROJECT REPORT DIRECTIONAL-BORE GROUND SOURCE HEAT PUMP FIELD REPORT Rio Mondego, California August 214 WESTERN COOLING EFFICIENCY CENTER PREPARED FOR: Bruce Baccei Project Manager Sacramento Municipal

More information

REGRESSION ANALYSIS ON INFLUENCE OF VARIOUS FACTORS ON HEAT TRANSFER OF VERTICAL GROUND HEAT EXCHANGER

REGRESSION ANALYSIS ON INFLUENCE OF VARIOUS FACTORS ON HEAT TRANSFER OF VERTICAL GROUND HEAT EXCHANGER 00028-1 - REGRESSION ANALYSIS ON INFLUENCE OF VARIOUS FACTORS ON HEAT TRANSFER OF VERTICAL GROUND HEAT EXCHANGER Rui, Fan, Associate Prof., Sino-German College of Applied Sciences, Tongji university, Shanghai,

More information

Parametric Study for Evaluation of Design Parameters of Standing Column Well

Parametric Study for Evaluation of Design Parameters of Standing Column Well Proceedings World Geothermal Congress Bali, Indonesia, 5-9 April Parametric Study for Evaluation of Design Parameters of Standing Column Well Dong-Yeop Kwak 1, Duhee Park 1, Jae-Hoon Chang 1, Sang-Min

More information

Section II: Defining Ground Source

Section II: Defining Ground Source March 2010 Mumbai Delhi Chennai Kolkata Section II: Defining Ground Source Introductory Seminar on Ground Source Heat Pump Systems SAP 000000-000000 Programme T002 Funding support from Government of Canada

More information

EXPERIMENT AND NUMBERICAL ANALYSIS OF THE DISCONTINUOUS OPERATION FOR GROUND HEAT EXCHANGERS

EXPERIMENT AND NUMBERICAL ANALYSIS OF THE DISCONTINUOUS OPERATION FOR GROUND HEAT EXCHANGERS EXPERIMENT AND NUMBERICAL ANALYSIS OF THE DISCONTINUOUS OPERATION FOR GROUND HEAT EXCHANGERS Gao Qing, Li Ming, Jiang Yan, Yu Ming, Qiao Guang Jilin University Changchun,JiLin 130025, China Tel: 86-431-5095897

More information

Tunnels, a new potential for sensible heat storage in rock: 3D numerical modelling of a reversible exchanger within tunnel

Tunnels, a new potential for sensible heat storage in rock: 3D numerical modelling of a reversible exchanger within tunnel Tunnels, a new potential for sensible heat storage in rock: 3D numerical modelling of a reversible exchanger within tunnel Chaima SOUSSI, Olivier FOUCHÉ, Gonzague BRACQ, Sophie MINEC Email: soussichaima@gmail.com

More information

Performance evaluation of hybrid solar parabolic trough concentrator systems in Hong Kong

Performance evaluation of hybrid solar parabolic trough concentrator systems in Hong Kong Performance evaluation of hybrid solar parabolic trough concentrator systems in Hong Kong Huey Pang* 1, Edward W.C. Lo 1, TS Chung 1 and Josie Close 2 * 1 Department of Electrical Engineering, The Hong

More information

Research on integrated solar and geothermal energy engineering design in hot summer and cold winter area

Research on integrated solar and geothermal energy engineering design in hot summer and cold winter area Available online at www.sciencedirect.com Procedia Engineering 21 (2011) 648 655 2011 International Conference on Green Buildings and Sustainable Cities Research on integrated solar and geothermal energy

More information

Performance Evaluation under the Actual Operation Condition of a Ground Source Multiheat Pump System

Performance Evaluation under the Actual Operation Condition of a Ground Source Multiheat Pump System Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2010 Performance Evaluation under the Actual Operation Condition of a Ground

More information

Aalborg Universitet. CLIMA proceedings of the 12th REHVA World Congress Heiselberg, Per Kvols. Publication date: 2016

Aalborg Universitet. CLIMA proceedings of the 12th REHVA World Congress Heiselberg, Per Kvols. Publication date: 2016 Aalborg Universitet CLIMA 2016 - proceedings of the 12th REHVA World Congress Heiselberg, Per Kvols Publication date: 2016 Document Version Publisher's PDF, also known as Version of record Link to publication

More information

Research progress on heat pumps and mchp at Northumbria

Research progress on heat pumps and mchp at Northumbria 31 st HEXAG Meeting Research progress on heat pumps and mchp at Northumbria 20 th May 2014 Chris Underwood (Professor of Energy Modelling for the Built Environment, Faculty of Engineering & Environment,

More information

COMPUTER SIMULATION AND EXPERIMENTAL VALIDATION OF A MODERN HOTEL ON BUILDING ENERGY CONSERVATION

COMPUTER SIMULATION AND EXPERIMENTAL VALIDATION OF A MODERN HOTEL ON BUILDING ENERGY CONSERVATION , Volume 4, Number 1, p.6-13, 23 COMPUTER SIMULATION AND EXPERIMENTAL VALIDATION OF A MODERN HOTEL ON BUILDING ENERGY CONSERVATION K.H. Yang and S.C. Wu Mechanical Engineering Department, National Sun

More information

VERIFICATION OF OPTIMUM OPERATION METHOD BY SIMULATION FOR THE HVAC SYSTEM WITH A THERMAL STORAGE TANK IN AN ACTUAL BUILDING

VERIFICATION OF OPTIMUM OPERATION METHOD BY SIMULATION FOR THE HVAC SYSTEM WITH A THERMAL STORAGE TANK IN AN ACTUAL BUILDING Eleventh International IBPSA Conference Glasgow, Scotland July 7-3, 9 VERIFICATION OF OPTIMUM OPERATION METHOD BY SIMULATION FOR THE HVAC SYSTEM WITH A THERMAL STORAGE TANK IN AN ACTUAL BUILDING Hiromasa

More information

International Forum on Energy, Environment Science and Materials (IFEESM 2015)

International Forum on Energy, Environment Science and Materials (IFEESM 2015) TRNSYS Simulation of Hybrid Ground Source Heat Pump System Based on Cooling Conditions Jun Zhang1, a *, Shunyu Su1, b*, Lamei Liu1,c, Chuanhui Zhou1,d, Lei Shi2,e 1 College of Urban Construction, Wuhan

More information

New Large Geothermal Storage Project in Zurich/Switzerland for Heating and Cooling

New Large Geothermal Storage Project in Zurich/Switzerland for Heating and Cooling Proceedings World Geothermal Congress 25 Antalya, Turkey, 24-29 April 25 New Large Geothermal Storage Project in Zurich/Switzerland for Heating and Cooling E. Rohner, S. Bassetti and T. Kohl GEOWATT AG,

More information

Thermal Efficiency of the Borehole Heat Exchanger Built with Drilling Mud.

Thermal Efficiency of the Borehole Heat Exchanger Built with Drilling Mud. Thermal Efficiency of the Borehole Heat Exchanger Built with Drilling Mud. Masatoshi Yamaguchi yamaguchi@jgd.jp Kiichi Numazawa numazawa@jgd.jp Masahiko Katsuragi m-katsuragi.jgd.jp Japan Ground Water

More information

Available online at ScienceDirect. Procedia Engineering 121 (2015 )

Available online at  ScienceDirect. Procedia Engineering 121 (2015 ) Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 121 (2015 ) 1413 1419 9th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC) and the 3rd International

More information

MCS Based Design for GSHPs Horses for Courses. GSHPA Energy Expo Stone Sept 2017 Robin Curtis GeoScience Ltd

MCS Based Design for GSHPs Horses for Courses. GSHPA Energy Expo Stone Sept 2017 Robin Curtis GeoScience Ltd MCS Based Design for GSHPs Horses for Courses GSHPA Energy Expo Stone Sept 2017 Robin Curtis GeoScience Ltd Dog n Pony Show Robin on MCS why / how / what / when / where Chris on not the MCS approach why

More information

Natural Ventilation System for a School Building Combined with Solar Chimney and Underground Pit

Natural Ventilation System for a School Building Combined with Solar Chimney and Underground Pit Natural Ventilation System for a School Building Combined with Solar Chimney and Underground Pit Yoshiteru Shinada, Ken-ichi Kimura, Hiromasa Katsuragi, Sung-ki Song Techno Ryowa Ltd., Japan International

More information

European Cooperation in the field of Scientific and Technical Research. Building Integration of Solar Thermal Systems TU1205 BISTS

European Cooperation in the field of Scientific and Technical Research. Building Integration of Solar Thermal Systems TU1205 BISTS Solar Combi systems Dorota Chwieduk Institute of Heat Engineering, ITC Faculty of Power and Aeronautical Engineering, MEiL Warsaw University oftechnology, PW Availability of solar energy Availability of

More information

Modeling of Usage of Air Injection Well in a Geothermal System

Modeling of Usage of Air Injection Well in a Geothermal System Excerpt from the Proceedings of the COMSOL Conference 2009 Milan Modeling of Usage of Air Injection Well in a Geothermal System Xiaolong Ma *1, Jürgen Grabe 2 1,2 Institute for Geotechnics and Construction

More information

Heat Pump Field Trials and Implications for Design

Heat Pump Field Trials and Implications for Design Heat Pump Field Trials and Implications for Design GSHPA 26 th June 2012 Chris Laughton Managing Director The Solar Design Company 1 Contents German Fraunhofer trials 2011 Comparison with UK Heat Pump

More information

Design and development of an Earth Air Tube Heat Exchanger

Design and development of an Earth Air Tube Heat Exchanger Design and development of an Earth Air Tube Heat Exchanger Kunj M. Chauhan 1, Jaykumar G. Prajapati 2, Nikunjgiri Y. Goswami 3, Sunny N. Patel 4 and Krunal N. Patel 123 Bechlor of Mechanical Engineering

More information

Sustainable Building Façade and Advanced Fenestration Systems

Sustainable Building Façade and Advanced Fenestration Systems Workshop on Potential Technological Developments for Zero Carbon Buildings 16-17 Oct 2013 Sustainable Building Façade and Advanced Fenestration Systems Tin-Tai Chow Building Energy & Environmental Technology

More information

Study on Heat Exchange Characteristics for PHC Energy Piles

Study on Heat Exchange Characteristics for PHC Energy Piles The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM 12) Seoul, Korea, August 26-30, 2012 Study on Heat Exchange Characteristics for PHC Energy Piles *Sangwoo Park

More information

Jonas Strautnikas T6614KA ANALYSIS OF EXHAUST AIR-SOURCE HEAT PUMP. Bachelor s Thesis Double Degree Programme in Building Services Engineering

Jonas Strautnikas T6614KA ANALYSIS OF EXHAUST AIR-SOURCE HEAT PUMP. Bachelor s Thesis Double Degree Programme in Building Services Engineering Jonas Strautnikas T6614KA ANALYSIS OF EXHAUST AIR-SOURCE HEAT PUMP Bachelor s Thesis Double Degree Programme in Building Services Engineering January 2015 Date of the bachelor's thesis January 2015 Author(s)

More information

This article has been revised to include contents. Current Situation and Actions. for ZEB in Japan. Articles. Current situation and methodology

This article has been revised to include contents. Current Situation and Actions. for ZEB in Japan. Articles. Current situation and methodology Current Situation and Actions for in Japan GYUYOUNG YOON Nagoya City University yoon@yoonlab.net HIDEHARU NIWA Nikken Sekkei Research Institute MAKIKO UKAI Nagoya University GYO ONISHI TAISEI Corp. This

More information

A SIMPLE TOOL FOR SIMULATION OF GROUND SOURCE HEAT PUMP SYSTEMS

A SIMPLE TOOL FOR SIMULATION OF GROUND SOURCE HEAT PUMP SYSTEMS Paper O.1.4.2-1 - A SIMPLE TOOL FOR SIMULATION OF GROUND SOURCE HEAT PUMP SYSTEMS Jeffrey D. Spitler, Regents Professor, Oklahoma State University, Stillwater, OK, USA Lu Xing, PhD student, Oklahoma State

More information

Mechanical Redesign. Existing System: The following schematic was devised below.

Mechanical Redesign. Existing System: The following schematic was devised below. Mechanical Redesign Existing System: The mechanical system explained in the existing conditions was simulated on an energy modeling system call equest. This program was used because of its strong detailed

More information

Assessing the Energy Efficiency and Emissions of a Vertical Closed-Loop Geothermal System at West Chester University

Assessing the Energy Efficiency and Emissions of a Vertical Closed-Loop Geothermal System at West Chester University West Chester University Digital Commons @ West Chester University Student Work Geology & Astronomy 2014 Assessing the Energy Efficiency and Emissions of a Vertical Closed-Loop Geothermal System at West

More information

Measurement of COPs for Ground Source Heat Pump (GSHP) System in Heating and Cooling Mode

Measurement of COPs for Ground Source Heat Pump (GSHP) System in Heating and Cooling Mode Measurement of COPs for Ground Source Heat Pump (GSHP) System in Heating and Cooling Mode Jae-Han Lim 1 and Seung-Gi Won 2 1 Cheong-Ju University, Cheong-Ju, Korea 2 ES Co. Ltd, Cheong-Ju, Korea Corresponding

More information

Thermal Energy Storage in Office Buildings Foundations

Thermal Energy Storage in Office Buildings Foundations Thermal Energy Storage in Office Buildings Foundations H. Schnürer, C. Sasse, M. N. Fisch Technical University of Braunschweig Institute for Building Services and Energy Design D-38106 Braunschweig, Germany

More information

Available online at ScienceDirect. Energy Procedia 78 (2015 )

Available online at   ScienceDirect. Energy Procedia 78 (2015 ) Available online at www.sciencedirect.com ScienceDirect Energy Procedia 78 (2 ) 1937 1943 6th International Building Physics Conference, IBPC 2 Operation Analyse of a U-tube Ground Heat Exchangers of GSHP

More information

FEASIBILITY STUDY ON THE UTILIZATION OF GEOTHERMAL HEAT PUMP (GHP) SYSTEMS IN JAPAN

FEASIBILITY STUDY ON THE UTILIZATION OF GEOTHERMAL HEAT PUMP (GHP) SYSTEMS IN JAPAN FEASIBILITY STUDY ON THE UTILIZATION OF GEOTHERMAL HEAT PUMP (GHP) SYSTEMS IN JAPAN Shinji Takasugi 1, Tsukashi Akazawa 1, Takashi Okumura 1 and Mineyuki Hanano 2 1: JMC Geothermal Engineering Co., Ltd.,

More information

Introduction to Geothermal Comfort Systems in INDIA

Introduction to Geothermal Comfort Systems in INDIA Introduction to Geothermal Comfort Systems in INDIA History Ancient earth sheltered homes 1912 Swiss Patent 1945 - First GSHP operating in North America in Indianapolis 1949 Canada s first GSHP installation

More information

BETTER BUILDINGS BY DESIGN Sheraton Conference Center Burlington, Vermont. February 8, 2012

BETTER BUILDINGS BY DESIGN Sheraton Conference Center Burlington, Vermont. February 8, 2012 BETTER BUILDINGS BY DESIGN - 2012 Sheraton Conference Center Burlington, Vermont February 8, 2012 What is a geothermal System? Technically, it is a water source heat pump (WSHP) system that uses the

More information

Evaluation of reduced energy use resulting from a DHC network in the Shinjuku DHC area

Evaluation of reduced energy use resulting from a DHC network in the Shinjuku DHC area Evaluation of reduced energy use resulting from a DHC network in the Shinjuku DHC area Hashidate D 1 ; Nakajima Y 2 1 Graduate School Kogakuin University, Tokyo, Japan 2 Associate Professor Kogakuin University,

More information

Ground-Coupled Heat Pump And Energy Storage

Ground-Coupled Heat Pump And Energy Storage Ground-Coupled Heat Pump And Energy Storage By Ed Lohrenz, Member ASHRAE; and Sergio Almeida, P.Eng., Member ASHRAE Ground-coupled heat pump (GCHP) systems consume less purchased energy than an HVAC system

More information

Tomohiko Ihara *, Yutaka Genchi National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan

Tomohiko Ihara *, Yutaka Genchi National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan 4.4 EFFECT ON CO 2 EMISSIONS OF BUILDING-URBAN AREA BY INTRODUCING SOLAR REFLECTIVE PAINT Tomohiko Ihara *, Yutaka Genchi National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki,

More information

HEATING WITH A HEAT PUMP

HEATING WITH A HEAT PUMP HEFAT27 5 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics Sun City, South Africa Paper number: MM4 HEATING WITH A HEAT PUMP Marčič M.* *Author for correspondence Faculty

More information

Strategies for energy efficiency improvement in residential and office buildings: their role at building and country scale

Strategies for energy efficiency improvement in residential and office buildings: their role at building and country scale The Future Role of Energy Storage in South Eastern Europe Enlargement and Integration Action Workshop Strategies for energy efficiency improvement in residential and office buildings: their role at building

More information

Efficiency and heat losses of indirect water bath heater installed in natural gas pressure reduction station; evaluating a case study in Iran

Efficiency and heat losses of indirect water bath heater installed in natural gas pressure reduction station; evaluating a case study in Iran Efficiency and heat losses of indirect water bath heater installed in natural gas pressure reduction station; evaluating a case study in Iran 1.Ebrahim Khalili,. Seyyed Mostafa Hoseinalipour, 3.Esmaeil

More information

An Assessment Methodology of Shallow Geothermal Energy Projects

An Assessment Methodology of Shallow Geothermal Energy Projects Send Orders for Reprints to reprints@benthamscience.ae The Open Fuels & Energy Science Journal, 214, 7, 169-175 169 An Assessment Methodology of Shallow Geothermal Energy Projects You Shuang *,1, Li Xiangyu

More information

Albert Złotkowski*, Angelika Druzgała* DETERMINING THE ACTUAL TEMPERATURE OF THE SIDE OF A BOREHOLE HEAT EXCHANGER**

Albert Złotkowski*, Angelika Druzgała* DETERMINING THE ACTUAL TEMPERATURE OF THE SIDE OF A BOREHOLE HEAT EXCHANGER** AGH DRILLING, OIL, GAS Vol. 34 No. 4 2017 http://dx.doi.org/10.7494/drill.2017.34.4.855 Albert Złotkowski*, Angelika Druzgała* DETERMINING THE ACTUAL TEMPERATURE OF THE SIDE OF A BOREHOLE HEAT EXCHANGER**

More information

A SIMULATION OF AN UNDERGROUND HEAT STORAGE SYSTEM USING MIDNIGHT ELECTRIC POWER AT PARK DOME KUMAMOTO

A SIMULATION OF AN UNDERGROUND HEAT STORAGE SYSTEM USING MIDNIGHT ELECTRIC POWER AT PARK DOME KUMAMOTO A SIMULATION OF AN UNDERGROUND HEAT STORAGE SYSTEM USING MIDNIGHT ELECTRIC POWER AT PARK DOME KUMAMOTO Kouji Sakai*, Osamu Ishihara*, Kengo Sasaguchi*, Hiroyuki Baba** and Takamitsu Sato*** * Kumamoto

More information

Citation for the original published paper (version of record):

Citation for the original published paper (version of record): http://www.diva-portal.org This is the published version of a paper published in Geo Outlook. Citation for the original published paper (version of record): Monzó, P., Lazzarotto, A., Mazzotti, W., Acuña,

More information

Electric Forward Market Report

Electric Forward Market Report Mar-01 Mar-02 Jun-02 Sep-02 Dec-02 Mar-03 Jun-03 Sep-03 Dec-03 Mar-04 Jun-04 Sep-04 Dec-04 Mar-05 May-05 Aug-05 Nov-05 Feb-06 Jun-06 Sep-06 Dec-06 Mar-07 Jun-07 Sep-07 Dec-07 Apr-08 Jun-08 Sep-08 Dec-08

More information

ScienceDirect. Simulation based mixed mode building design

ScienceDirect. Simulation based mixed mode building design Available online at www.sciencedirect.com ScienceDirect Energy Procedia 00 (2016) 000 000 www.elsevier.com/locate/procedia 5th International Conference on Advances in Energy Research, ICAER 2015, 15-17

More information

Coupling of Building Data Analysis and Building Simulation - Case Study in Large-scale Complex Building -

Coupling of Building Data Analysis and Building Simulation - Case Study in Large-scale Complex Building - Coupling of Building Analysis and Building Simulation - Study in Large-scale Complex Building - Yoshiyuki Shimoda 1, Kazuki Mitamura 1, Yuki Mataga 1, Koki Oshima 1, Hiromasa Tanaka 2, Shingo Tanabe 2

More information