This is the author s version of a work that was submitted/accepted for publication in the following source:
|
|
- Peregrine Tucker
- 6 years ago
- Views:
Transcription
1 Al-Azhar University Faculty of Engineering Architecture Department This is the author s version of a work that was submitted/accepted for publication in the following source: Mayhoub, M.S. (2013). What is preventing innovative daylighting systems from widespread use? In the Proceedings of LuxEuropa 2013, the 12 th European Lighting Conference, Krakow, Poland. p Copyright 2013 [please consult the authors] Notice: Changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published source.
2 WHAT IS PREVENTING INNOVATIVE DAYLIGHTING SYSTEMS FROM WIDESPREAD USE? Mayhoub, M.S. 1 1 Al-Azhar University, Cairo, EGYPT msmayhoub@hotmail.com ABSTRACT The innovative daylighting systems (IDS) seek to maximize the utilization of daylight in building, where the conventional daylighting systems are no more able to meet the illumination requirements. Although many IDS have been commercially produced, none of them managed to penetrate the market strongly. Challenges, such as high initial cost, utilization difficulties, and application limitations, prevent them from widespread use. Most of these challenges can be overcome, but no IDS is likely to overcome all them at once. Alternatively, a number of systems efficiently suit different circumstances is a more practical approach. Keywords: Innovative Daylighting Systems, Collector, Guide, Diffuser 1. INTRODUCTION Conventional side and top lighting techniques have been used to provide adequate amount of daylight as long as a high skin-to-volume ratio has been maintained. The new building forms and users' needs resulted in compacted buildings, and thus maintaining the high skin-to-volume ratio became inapplicable. The need for deep-plan buildings meant that side windows are not the best choice, as they distribute flux principally up to 6m from the window wall, leaving the remainder of the perimeter zone and the core lacking sufficient light. The need for high-rise buildings meant that roof openings are not the proper solution as they are mostly inapplicable for other than the highest storey. The precious value of city land made the provision of daylighting via central spaces, which raise the skin-to-volume ratio, an uneconomic alternative. Consequently, three strategies have been developed to bring daylight deeper into the new buildings forms, and to control and distribute direct sunlight, by either improving the conventional techniques, developing new glazing systems, or inventing innovative daylighting systems. In any strategy, newly developed devices and optical materials are used. The produced daylighting systems, additionally, contribute in conserving energy, protecting the environment, and enhancing building users' productivity and well-being. 2. DAYLIGHTING SYSTEMS DEVELOPMENT STRATEGIES The attempts to enhance the provision of daylighting in buildings can be classified into three strategies as described below Improving the conventional daylighting techniques This strategy seeks to improve the conventional daylighting techniques to enhance their ability to satisfy new buildings requirements and to meet new usages needs of daylighting. That mainly achieved via the use of new optical materials, elements and devices, such as overhangs, lightshelves, louvers, blinds, screens, and filters. The usage of these techniques either reduce daylighting problems, send more light to the back of the space, or improve the daylighting uniformity within the space. Over the time the old er
3 solutions, such as overhangs, have been turned into architectural vocabularies, and the newer ones, such as metal louvers, have become part of the modern architecture image Developing glazing systems The developed glazing technologies are mainly concerned in enhancing the thermal insulation properties of the glazing system, and thus allow more glazing area to be applied without increasing building solar gain. There are three fundamental approaches to improving the energy performance of glazing products, first: by changing the chemical composition or physical characteristics of the glazing material, second: to apply a coating to the glazing material surface to reduce heat gain and glare, third: to assemble various layers of glazing and control the properties of the spaces between the layers [1] Inventing innovative daylighting systems This strategy is more concerned about delivering daylight into remote and windowless spaces, and aims to maximize the utilization of daylight. Many IDS have been developed with a vast variation of technologies, covering a wide range of applications. They are typically consist of light collector, light guide and diffuser. Passive or active collectors mounted on the building roof or façade, and made of clear optical materials, mirrors or lenses, are used to collect direct or diffused daylight. The light guide delivers the collected daylight through the building vertical voids (e.g. atrium) or via fibre optics or light pipes (ducts). Glass or plastic fibre optics maybe used. Light ducts, made of/or lined with high reflective materials became recently cost-effectively available. A wide variety of conventional or custom-designed light outputs are employed to suit most architectural applications. The IDS are the subject to this study since they are relatively new, expensive, and need to develop more applicable and aesthetically appealing systems. 3. INNOVATIVE DAYLIGHTING SYSTEMS REVIEW Since this study focuses on the systems have the potentials to spread widely, systems commercially produced or had demonstration installation will be reviewed Commercially produced systems Few systems of the developed IDS has managed to turn into commercial products. The passive tubular daylight guidance system (TDGS) is believed to be the most commercially available IDS. It proved a universal acceptance and applicability over a wide range of building usages and geographical locations, though it still has some limitations. It is mostly installed in the highest storey of the building due to difficulty in guide penetration of usable working spaces, although it is technically able to deliver daylight further, such as the 14-stories sun pipe installed in Washington DC [2]. Many types of the Heliostat are produced to collect sunlight by set of mirrors and/or lenses, and send it into building core via vertical voids. Another internal set of mirrors may be used to distribute the daylight. The Heliostat has very different shapes and components, and can be considered custom designed system. The Switzerland Company Heliobus produced daylighting system combined of a kind of Heliostat to collect sunlight and deliver it via kind of sun pipes into building core. Few custom produced systems have been installed since the first installation in the The Japanese Himawari system, which targets the east Asian market since the early 1980s, collects and concentrates sunlight using tracking Fresnel lenses. Light may be transported up to 200m by optical fibres, and distributed using custom made luminairelike devices [3]. A similar concept to collect and deliver daylight is used by the Swedish
4 Parans system that produced the first commercial product in Since then three generations have been developed, all of them consist of an array of small Fresnel lenses simultaneously track and concentrate daylight. A bundle of up to 20m-length fibre optics channel the light to be distributed by various types of custom designed luminaires [4]. The American Sundolier system is a sky light of 0.6m roof penetration collects daylight by set of mirrors track and concentrate sunlight. Daylight is indirectly distributed to large areas using unique in-room fixtures. The system has been installed in many building types since founded in Sunportal daylighting system has been developed by a South Korean team, and has become commercially available since It actively captures sunlight b y a heliostat with an ultra-sunlight concentrator. The light travels through a series of special optical relay lenses, providing the highest invented transmission rates over a distance up to 200m. Transparent tube diffuser is used to illuminate the space. The available few installations exist in South Korea, for industrial and underground tunnel use [5] Demonstrated systems The Canadian Core Sunlighting system has been announced to be commercially launched in Many demonstration cases installed in the North America since The system tracks and collects daylight by series of mirrors assembled in a solar canopy attached to the building façade, and channels and distributes it up to 15m within multistorey buildings by dual function light duct. The American Hybrid Solar Lighting (HSL) system has been under development since the beginning of the 21st century. The first prototype has been produced in Since then, nearly hundred demonstration cases have been installed. However, serious of technica l difficulties enforced the system developers to carry out radical changes in the original design. In 2013, Instead of a set of two mirrors, an array of Fresnel lenses have been used to track and concentrate sunlight. Fibre optics up to 15m length are used to channel the concentrated sunlight into a conventional-like luminaire. 4. INNOVATIVE DAYLIGHTING SYSTEMS POTENTIALS Improving the conventional daylighting systems so far have limitations in terms of light delivery distance and amount. The IDS come with new technologies to overcome these limitations throughout different approaches that based in the usage of light collectors maximize the daylight channelled by light guides into building core. Comparing daylight collection capabilities of the IDS based in the available data is challenging, due to the vast variety of the operating conditions (e.g. sky condition, time of measurement, geographical location etc.) under which the measurements may be taken. In addition to the collector size, and the collector distance from the measurement point. The following values are examples, cited from the developers' publications, just to make a rough idea about the possible collected/delivered daylight amount. The HSL collects lumens under standard operating conditions [6], Sundolier system delivers lumens [7], Sunportal system delivers more than peak lumens [5], and Parans system output is up to 5500 lumens [4]. A distinct advantage of the IDS is their ability to deliver daylight into windowless and remote space in buildings. Daylight delivery distance is typically 15-20m in most of the IDS. The sun pipes have the potential to deliver further distance if a bigger pipe diameter has been used. A light delivery distance of 200m, via optical fibre or light pipes, has been claimed by Himawari system for the former and Sunportal system for the later
5 Moreover, most of the IDS are designed to provide a glare free lighting, and to reduce the internal heat gain and the fabric damage effects by eliminating both IR and UV wavelengths of the collected light spectrum. 5. INNOVATIVE DAYLIGHTING SYSTEMS CHALLENGES Although the IDS have the potentials to widespread, a long list of challenges prevents them from strongly penetrate the market. These challenges affect the daylighting quality, competitive cost, applicability, and ease of installation and operation High initial cost Providing a cost-effective lighting system is the major problem that faces any IDS. The more the amount of daylight collected and delivered, the highest the technology, the more the initial cost, and the smaller is the purchasing power. The commercial IDS price lists are mostly available only for customers not for academic purpose. However, a previous study by the author [8] about the costs and benefits of using the daylight guidance system (DGS) estimated the capital costs (including the initial and installation costs) of some IDS under identified circumstances. The TDGS cost per meter square is 76% more than an equivalent electric lighting system. Parans system cost, assuming a high volume production, is about six times that of the electric lighting systems. Sunportal system is too expensive to be residentially or commercially used at the recent time. Under the recent prices of the IDS, apart from the TDGS, most of them are used for reasons other than reducing building utility bills Utilization difficulties For any IDS to be used widely, it has to be integrated seamlessly into existing design concepts, and thus easily embraced by architects and lighting designers as a mean for offering daylight as a lighting option. The light guide is the most difficult part in terms of integration, then the collector and the diffuser. Given the currently commercially available systems, light ducts with relatively big circular or rectangular cross-sections, typically of range of Ø mm or around 250 X 600 mm, are used in all of them but Himawari and Parans systems that used fibre optics cables, which are almost fully integrated due to their flexibility and small cross section. Meanwhile, the light ducts that used in low or non-concentrating systems, which are more suitable for use under cloudy sky conditions, have difficulties to fit in existing buildings or to avoid conflicts with the HVAC and structural systems. Roof mounted light collectors to far extend can be incorporated into building design, whilst more difficulties face the façade mounted collectors since they have more influence on the architectural image. A wide variety of light diffusers are available suit most of the architectural applications. However, some diffusers are available in certain shapes suits the system's technology, and need to be considered by the interior designers, such as the core Sunlighting system linear luminaire Application limitations The light collection technology determines systems applicability, in terms of geographical location, climatic region, and sky condition. The collectors' variations include high, low or non-concentrating collectors, horizontal, vertical or inclined, and passive or active collectors. The high concentrating collectors work efficiently only under predominantly clear sky, since the direct illuminance only can be concentrated. Meanwhile, the non-concentrating collectors collect both diffused and direct illuminance, and thus are applicable under all sky conditions and over all geographical locations. High concentrating systems potentially deliver more amount of daylight under clear skies, while non-concentrating systems delivers more under overcast skies. Under the partially cloudy skies, the delivered amount comes second to the lighting quality in terms of the
6 uniform distribution over the time, which is easier to be achieved by non-concentrating systems as they collect both diffused and direct illuminance. High concentrating systems suffer severe changes in delivered daylight under partially cloudy condition. The occupants note of rapidly changes in the illuminance level is highly likely, which may cause inconvenience Technology challenges More complicated technologies are required to deliver more amount of daylight further distances via smaller guide. Some challenges still lacking satisfactory solutions, such as concentrating the sunrays precisely into the end of the fibre optics to avoid any burning damage. The de-concentration of the concentrated sunrays to provide a uniform planar illuminance distribution still go through many optical processes that are likely to change illuminance characteristics and reduce the delivered amount. The typical delivery distance does not exceed 20m for most of the IDS, which is no more than six stories below a roof mounted collector. Ultra concentrator is used by Sunportal system to channel the daylight 200m, but the technology is not revealed for public Maintaining daylighting quality External view, unique spectrum and unpredictable changes in colour and intensity are what make daylight a favourable choice. The big challenge facing the IDS is how to channel the daylight via light guides, and carry out all the optical processes without losing the perception of daylight. The connection with the external view is absent. The daylight spectrum is likely to change due to the use of spectral coatings to eliminate UV and IR wavelengths, and the obstruction of some of them in the fibre optics. A uniform distribution of the light within the space and over the working time is another quality required for most applications. De-concentrating sunlight by the output device to achieve a uniform planar distribution within a reasonable spacing to height ratio is challenging. The end emitting fibre optics produce narrow beams of light, which result in a non-uniform planar distribution. A uniform distribution over the time cannot be achieved by the highly concentrating systems that suffer rapid changes in the delivered illuminance under partially cloudy sky User's awareness and acceptance The users' awareness of the importance of the utilization of daylight, and acceptance of the employment of the IDS are essential to widespread their usage. Reducing building energy bill is not sufficient to convince people to pay the IDS high initial cost. Thus, users need to perceive the provided illuminance by the IDS as daylight, and accordingly accept that this augments the visual environment and the consequent well-being enhancement and productivity improvement. The awareness of the importance of using daylight to conserve energy, protect environment and preserve natural resources; is another impact helps to widespread the usage of the IDS in spite of their high initial cost. Building or energy usage regulations come as another 'tool' in this regard Need for restrictive maintenance program The extensive use of optical materials in the IDS requires high attention to be paid to avoid the precipitation of the air particulates, and the condensation of the air humidity on the optical surfaces. Particulates such as dust, smoke, and air vapour (if condensed) significantly reduce optical processes efficiency. Protection and maintenance program has to be restrictively applied. Light ducts have to be air tight to prevent any deposition of air particulates, gases, or pollutants; otherwise, a difficult maintenance process has to be carried out to clean the ducts inner surfaces. The collectors and diffusers surfaces require a regular maintenance; vary in time interval according to the local air pollution
7 6. DISCUSSION AND CONCLUSION IDS have shared features in common, they are not created equal though. Vast variety in technology, performance, application, installation, size and cost respond to the various requirements and challenges. However, none of the produced IDS is applicable under all sky conditions, over all geographical locations, in all building forms, for all illumination purposes, and to all projects budgets. The capital cost is a function in the optical material prices, technology complexity, ease of installation, and production volume. For the first two, it is usually a matter of time to be cost-effectively available. Ease of installation can be achieved by the early incorporation of the IDS in the building design process. Meanwhile, the mass production based in many external stimulus, in addition to the system efficiency, such as investors' awareness, users' acceptance, and products reputation. There are a growing awareness that considering energy bill cut off the only reason to convince people to use the IDS is insufficient. The impact on the cost of benefits such as health and psychological enhancement may become apparent only in the long term, but they are nonetheless factual and should be taken into consideration to help the IDS to be economically attractive option [9]. Governmental legalizations enforce the utilization of daylighting in the architecture practice, and media awareness enhances people participation in conserving energy, among many other efforts are required to increase the IDS utilization, thus raise the production volume, and reduce the systems cost, and the loop goes on. Utilization of the IDS is influenced by their ability to integrate into building design. Systems use fibre optics guides have insignificant difficulty to rout throughout the building, but have a significant limitation in terms of applicability under different sky conditions. On the other hand, systems use light ducts are more likely to conflict with other building systems, more difficult to penetrate building vertically, and more challenging to fit in existing building, but they are applicable under all sky conditions. Since the non-concentrating systems are the optimal choice in wide climatic regions, incorporation of such systems in earlier stages of building design process is essential for successful utilization. Influential collectors, such as that of the Core Sunlighting system, need creative architectural solutions to be merged in the façade fabric. In brief, no IDS is likely to overcome all the challenges, but a number of systems efficiently suit different circumstances is a more practical approach. REFERENCES 1. HOOTMAN, T. Net Zero Energy Design: A Guide for Commercial Architecture, 2012: John Wiley & Sons. 2. CARPENTER NORRIS CONSULTING. Solar Light Pipe in Washington, D.C. Detail 2004, Himawari solar lighting system. [cited 2013 May]; Available from: 4. PARANS, Product specification. [cited 2013 June]; Available from: SUNLIGHT direct LLC, Product. [cited 2013 June]; Available from: 7. SUNDOLIER. [cited 2013 June]; Available from: 8. MAYHOUB, M. & Carter, D. The costs and benefits of using daylight guidance to light office buildings. Building and Environment 2011, 46, BOUBEKRI, M. Daylighting, architecture and health, building design strategies, Oxford 2008: Elsevier Ltd
NATURAL DAYLIGHTING SYSTEM
NATURAL DAYLIGHTING SYSTEM WHAT IF YOU COULD HAR_ NESS THE SUN TO NATURALLY LIGHT UP AN OFFICE, RETAIL STORE, COM_ MERCIAL SPACE OR HOTEL? NOW YOU CAN... /LFX WHY NATURAL SUNLIGHT? People prefer natural
More informationHybrid lighting systems: A feasibility study for Europe
Hybrid lighting systems: A feasibility study for Europe Mohammed S. Mayhoub 1, David Carter 2 Abstract Hybrid systems simultaneously deliver daylight and electric light into a building where they are combined
More informationAnnexing Green Building Rating Points through Multipurpose Vertical Light Pipes
ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 Indian Journal of Science and Technology, Vol 9(46), DOI: 10.17485/ijst/2016/v9i46/107133, December 2016 Annexing Green Building Rating Points through
More informationAn enhancement of the daylighting from side-window using two-section venetian blind
An enhancement of the daylighting from side-window using two-section venetian blind Vichuda Mettanant 1,2, Pipat Chaiwiwatworakul 1,2,*, Pattana Rakkwamsuk 3 1 The Joint Graduate School of Energy and Environment,
More informationBringing a little sunshine into our lives
Bringing a little sunshine into our lives Hybrid Solar Lighting K.L.C.N. Kumara chathurangaliyanage@hotmail.com Computing and Information System Sabaragamuwa University. 1 Hybrid Sola Lighting System Solution
More informationBUILDING INTEGRATION OF RENEWABLE ENERGY SYSTEMS TOWARDS ZERO OR NEARLY ZERO ENERGY BUILDINGS
BUILDING INTEGRATION OF RENEWABLE ENERGY SYSTEMS TOWARDS ZERO OR NEARLY ZERO ENERGY BUILDINGS S. A. Kalogirou Department of Mechanical Engineering and Materials Science and Engineering, Cyprus University
More informationBringing a little sunshine into our lives
Bringing a little sunshine into our lives Hybrid Solar Lighting K.L.C.N. Kumara chathurangaliyanage@hotmail.com Computing and Information System Sabaragamuwa University. 1 Hybrid Sola Lighting System Solution
More informationPoor distribution & glare
Light transmission The benefits of the use of natural daylight in buildings in respect of health & well-being, safety, productivity and energy savings are well documented. LIGHT TRANSMISSION Light that
More informationTo experience Parans Solar Lighting, is to experience the presence of nature.
2012 360 To experience Parans Solar Lighting, is to experience the presence of nature. The Parans System Parans Solar Lighting creates unique indoor environments where the natural variation of outdoor
More informationSKYLIGHT DESIGN PERFORMANCE EVALUATION METHOD DEVELOPMENT WITH THERMAL AND DAYLIGHT SIMULATION
SKYLIGHT DESIGN PERFORMANCE EVALUATION METHOD DEVELOPMENT WITH THERMAL AND DAYLIGHT SIMULATION Xianou Li, Frederick Wong, and Yihan Li Arup International Consultants (Shanghai) Co Ltd ABSTRACT This paper
More informationDaylight Harvesting in Tropic
Daylight Harvesting in Tropic Daylight space when done right is much nicer environment than electrically lit spaces. Efficacy lm/watt Daylight is Cool & Free 280 Luminous Efficacy 280 230 180 130 80 30
More informationTHE USE OF LIGHT PIPES FOR DEEP PLAN OFFICE BUILDINGS A case study of Ken Yeang's bioclimatic skyscraper proposal for KLCC, Malaysia
THE USE OF LIGHT PIPES FOR DEEP PLAN OFFICE BUILDINGS A case study of Ken Yeang's bioclimatic skyscraper proposal for KLCC, Malaysia Veronica Garcia Hansen*, Ian Edmonds**, Richard Hyde*** *School of Design
More informationA STUDY OF DAYLIGHTING TECHNIQUES AND THEIR ENERGY IMPLICATIONS USING A DESIGNER FRIENDLY SIMULATION SOFTWARE
A STUDY OF DAYLIGHTING TECHNIQUES AND THEIR ENERGY IMPLICATIONS USING A DESIGNER FRIENDLY SIMULATION SOFTWARE Amarpreet Sethi College of Architecture and Environmental Design Arizona State University,
More informationCOMPARATIVE EVALUATION OF SIDE-DAYLIGHTING STRATEGIES
COMPARATIVE EVALUATION OF SIDE-DAYLIGHTING STRATEGIES Michael J. Holtz, FAIA LightLouver LLC 685 S. Arthur Avenue Louisville, Colorado 80027 mholtz@lightlouver.com Zack Rogers, PE, IESNA LightLouver LLC
More informationNRC CONSTRUCTION TECHNOLOGY UPDATE
NRC CONSTRUCTION TECHNOLOGY UPDATE No. 82, June 2014 Performance of Tubular Daylighting Devices By A. Laouadi and H.H. Saber Tubular daylighting devices (TDDs) can economically admit natural light into
More informationBuilding and Environment
Building and Environment 53 (2012) 83e94 Contents lists available at SciVerse ScienceDirect Building and Environment journal homepage: www.elsevier.com/locate/buildenv A feasibility study for hybrid lighting
More informationDaylighting Design 12 th Annual Building Codes Education Conference March Bozeman, MT Jaya Mukhopadhyay, Co-Director, Integrated Design
Daylighting Design 12 th Annual Building Codes Education Conference March 27-30 2017 Bozeman, MT Jaya Mukhopadhyay, Co-Director, Integrated Design Lab Montana State University, Bozeman, MT March 30, 2017
More informationEnhancing visual comfort in classrooms through daylight utilization
Enhancing visual comfort in classrooms through daylight utilization Kleo Axarli and Katerina Tsikaloudaki Laboratory of Building Construction & Physics, Aristotle University of Thessaloniki, Greece Corresponding
More informationBall State Architecture ENVIRONMENTAL SYSTEMS 1 Grondzik 1
DAYLIGHT image by NASA use this powerful resource with skill and caution Ball State Architecture ENVIRONMENTAL SYSTEMS 1 Grondzik 1 Daylight and Design From the dawn of time until the widespread introduction
More information2 Wasco Parans Solar Lighting
2012 2 Wasco Parans Solar Lighting 2012 To experience Parans Solar Lighting is to experience the presence of nature. www.wascoskylights.com 3 The Parans System Parans Solar Lighting creates unique indoor
More informationADVANCED FAÇADES AND HVAC SYSTEMS: PRELIMINARY RESULTS OF FULL-SCALE MONITORING
ADVANCED FAÇADES AND HVAC SYSTEMS: PRELIMINARY RESULTS OF FULL-SCALE MONITORING M. Kragh, M. Colombari and M. Zobec Permasteelisa Group, Research & Engineering, 31020 San Vendemiano (TV), Italy www.permasteelisa.com,
More informationoptimize daylighting Opportunities
optimize daylighting Opportunities DESIGN STRATEGIES DESIGN STRATEGIES NATURAL LIGHTING FOR ENERGY EFFICIENCY DAYLIGHTING Using indirect natural light to illuminate indoor spaces as an alternative to electric
More informationDaylighting Design Principles and the LightLouver Daylighting System
Daylighting Design Principles and the LightLouver Daylighting System www.lightlouver.com 303 444 8773 Presenta(on Outline Dayligh(ng Basics Dayligh(ng Design Goals and Characteris(cs of a Good Dayligh(ng
More informationSAGEGLASS VARIABLE TINTED GLAZING INPUT SHEET FOR DIAL+ SOFTWARE
SAGEGLASS VARIABLE TINTED GLAZING INPUT SHEET FOR DIAL+ SOFTWARE V1 dated 21/04/2017 The following procedure describes data input and handling for SageGlass in DIAL+ natural lighting and thermal dynamic
More informationReducing energy demand in non-domestic buildings: integrating smart facades, ventilation, and surface heating and cooling
Reducing energy demand in non-domestic buildings: integrating smart facades, ventilation, and surface heating and cooling Phil Jones, Shan Shan Hou and XiaoJun Li Welsh School of Architecture, Cardiff
More informationDaylight has been a primary source of lighting in buildings. Daylighting improve indoor environmental quality and visual comfort. Moreover, it reduces
Effect of Window on Building Energy Performance and Indoor Environmental Quality T. Aker 1, C. Deniz 2, A. Tabancacı 3 and M.S. Mert 4 1 Energy Institute, Istanbul Technical University, Istanbul, Turkey,
More informationDAYLIGHTING. 5.1 Introduction{ TC "5.1 Introduction" \l 2 } { TC "'CHAPTER FIVE: DAYLIGHTING'" \l 1 }CHAPTER FIVE
1 { TC "'CHAPTER FIVE: DAYLIGHTING'" \l 1 }CHAPTER FIVE 5.1 Introduction{ TC "5.1 Introduction" \l 2 } DAYLIGHTING This chapter presents the method and results of an analysis of daylighting for the retail
More informationComparative Performance of Internal Venetian Blind and Roller Blind with Respects to Indoor Illumination Levels
Available online at www.sciencedirect.com ScienceDirect Procedia - Social and Behavioral Scien ce s 101 ( 2013 ) 542 553 AicQoL 2013 Langkawi AMER International Conference on Quality of Life Holiday Villa
More informationVeronica Garcia-Hansen Gillian Isoardi Michael Hirning John Bell
AN ASSESSMENT TOOL FOR SELECTION OF APPROPRIATE DAYLIGHTING SOLUTIONS FOR BUILDINGS IN TROPICAL AND SUBTROPICAL REGIONS: VALIDATION USING RADIANCE SIMULATION Veronica Garcia-Hansen Gillian Isoardi Michael
More informationIv. Absolute Towers, Ontario, Canada Architect: Yansong Ma
Iv. BRANDS and products 2. Glazing Architectural 2.0 Introduction 130 2.1 Low-emissivity Glass 133 2.1.1 Hard-Coat 134 energy Select 73 134 2.1.2 Soft-Coat 136 energy Select 63 137 energy Select R42 139
More informationAn assessment tool for selection of appropriate daylight solutions for buildings in tropical and subtropical regions:
An assessment tool for selection of appropriate daylight solutions for buildings in tropical and subtropical regions: Validation using radiance simulation Veronica Garcia-Hansen Gillian Isoardi, Michael
More informationWe ve cracked the code to harness the sun
We ve cracked the code to harness the sun FUSION 3.3 ft. 6.6 ft. Wire mesh fall protection. FUSION photovoltaic panel requires only one 0.5 diameter opening inside the sealed boot. That s smaller than
More informationSplitting and managing the solar spectrum for energy efficiency and daylighting
Splitting and managing the solar spectrum for energy efficiency and daylighting A.V.Pelegrini, D.Harrison, J.Shackleton School of Engineering and Design, Brunel University, London, United Kingdom ABSTRACT:
More informationThe only constant aspect of Technology is,.change! Sustaining Technology! MATERIAL. Sustaining Technology in Glazing
Sustaining Technology! The only constant aspect of Technology is,.change! -- Anonymous Sustaining Technology in Glazing Long way since 4000 BC, Today, Glass is no more a window element, but is an effective
More informationDAYLIGHTING CRITERIA IN URBAN BUILDINGS IN BANGKOK
04-030 The 005 World Sustainable Building Conference, DAYLIGHTING CRITERIA IN URBAN BUILDINGS IN BANGKOK Yingsawad CHAIYAKUL Faculty of Architecture, Khon Kaen University, Khon Kaen, 4000, Thailand, chaiyakul@hotmail.com
More informationEnergy Saving Benefits of Daylighting Combined with Horizontal Exterior Overhangs in Hot-and-Humid Regions
Energy Saving Benefits of Daylighting Combined with Horizontal Exterior Overhangs in Hot-and-Humid Regions Speakers: Huang, Kuo-Tsang 1 ; Fu, Chun 2 1 Department of Bioenvironmental Systems Engineering,
More informationTHE IMPACT OF GLAZING SELECTION ON DAYLIGHTING AND ENERGY PERFORMANCE FOR AN OFFICE BUILDING IN CANBERRA
THE IMPACT OF GLAZING SELECTION ON DAYLIGHTING AND ENERGY PERFORMANCE FOR AN OFFICE BUILDING IN CANBERRA Peter Taylor, Hélène Duponchel, and Paul Bannister Exergy Australia Pty Ltd PO Box 546 Belconnen
More informationadditional cooling energy consumption. Because the thermal resistance of windows has always been a weak point, even with vacuum glass or low-e glass,
Simulation Study of Automated Blinds Control Strategy for Minimizing Cooling and Lighting Energy Consumptions L. Xiao 1, F. Wang 2,*, Y. Gao 2, T. Gong 2, Y. Di 2, Y. Qian 2, and X. Luo 2 1 School of Mechanical
More informationLIGHTFLEX Tunable-White LED Tubular Daylighting System. Smart. Simple. Sustainable.
LIGHTFLEX Tunable-White LED Tubular Daylighting System Smart. Simple. Sustainable. Why Daylighting? It s natural, and it s free! Intuitively, we all sense that natural daylight is best. It enables our
More informationAnalysis of Indoor Luminous Environment and Power Generation by Roll Screen and Venetian Blind with PV Modules
European Journal of Sustainable Development (2017), 6, 4, 302-308 ISSN: 2239-5938 Doi: 10.14207/ejsd.2017.v6n4p302 Analysis of Indoor Luminous Environment and Power Generation by Roll Screen and Venetian
More informationUtilization of Combined Daylighting Techniques for Enhancement of Natural Lighting Distribution in Clear-Sky Residential Desert Buildings
Utilization of Combined Daylighting Techniques for Enhancement of Natural Lighting Distribution in Clear-Sky Residential Desert Buildings HANAN SABRY 1, AHMED SHERIF 2, MAHMOUD GADELHAK 1 1 Department
More informationSOLAR PHOTOVOLTAICS Part 1
SOLAR PHOTOVOLTAICS Part 1 Solar Energy Contents Irradiance, Solar Constant Solar Window & tilt effects Atmospheric effects, air mass Solar spectrum, sensitivity of PV materials to various wavelengths
More informationManaging Light & Daylight Efficiently for Tropical Office Buildings
Managing Light & Daylight Efficiently for Tropical Office Buildings By: Gregers Reimann IEN Consultants Sdn Bhd gregers @ ien.com.my www.ien.com.my SB10SEA, KLCC Convention Centre 4 May 2010, Malaysia
More informationAnalysis of different shading strategies on energy demand and operating cost of office building
Analysis of different shading strategies on energy demand and operating cost of office building Kwiatkowski, J 1,2 ; Rucińska, J 1,2 ; Panek, A 1,2 1 Warsaw University of Technology, Faculty of Environmental
More informationManaging Daylight and Energy with Integrated Louvers. White Paper. The future of vision & daylight control
Managing Daylight and Energy with Integrated Louvers White Paper The future of vision & daylight control TABLE OF CONTENTS Understanding daylighting design and integrated louvers...3 Lighting is a major
More informationDigging Deeper SOLAR ENERGY. Forms of Solar Energy
a) Is the wind speed the same in the morning; the afternoon; the evening? b) Move your anemometer to another location. Is it windier in other places? c) Do trees or buildings block the wind? 7. Back in
More informationInnovative Daylight Systems for the Tropics
Innovative Daylight Systems for the Tropics By: Gregers Reimann IEN Consultants Sdn Bhd gregers @ ien.com.my www.ien.com.my TSGBC, KLCC Convention Centre 4 July 2012, Malaysia Contents o Daylight is -
More informationVentilated Illuminating Wall (VIW): Natural ventilation and daylight experimental analysis on a 1:1 prototype scale model
Ventilated Illuminating Wall (VIW): Natural ventilation and daylight experimental analysis on a 1:1 prototype scale model O. Boccia *, F. Chella, P. Zazzini D.S.S.A.R.R., Faculty of Architecture University
More informationTREES Training for Renovated Energy Efficient Social housing. Section 1 Techniques 1.2 Replacement of glazing
TREES Training for Renovated Energy Efficient Social housing Intelligent Energy -Europe programme, contract n EIE/05/110/SI2.420021 Section 1 Techniques 1.2 Replacement of glazing Bruno PEUPORTIER ARMINES
More informationSTOP & SHOP, NEW PALTZ, NY
Daylighting Case Studies STOP & SHOP, NEW PALTZ, NY Project Highlights Skylights with 50 degree splayed light wells Dimming T5 luminaires Hybrid open loop and closed loop photocontrol system Stop & Shop
More informationSystematic Analysis on Sustainable Retrofit of Typical High-rise Community Based on Building Performance Simulation Model Yang Hongwei 1,*, Liu Congho
Systematic Analysis on Sustainable Retrofit of Typical High-rise Community Based on Building Performance Simulation Model Yang Hongwei 1,*, Liu Conghong 1 1 School of Architecture, Tianjin University,
More informationCONTROL STRATEGIES AND ENERGY SAVING POTENTIALS FOR VARIABLE TRANSMITTANCE WINDOWS VERSUS STATIC WINDOWS
CONTROL STRATEGIES AND ENERGY SAVING POTENTIALS FOR VARIABLE TRANSMITTANCE WINDOWS VERSUS STATIC WINDOWS J. Karlsson, B. Karlsson * and A. Roos Department of Materials Science, The Ångström laboratory,
More informationAn Experimental Study for the Evaluation of the Environmental Performance by the Application of the Automated Venetian Blind
An Experimental Study for the Evaluation of the Environmental Performance by the Application of the Automated Venetian Blind Ji-Hyun Kim 1, Kyoung-Wn Yang 1, Young-Joon Park 1, Kyung-Hee Lee 2, Myoung-Souk
More informationAvailable online at ScienceDirect. Procedia Engineering 121 (2015 )
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 121 (2015 ) 1869 1879 9th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC) and the 3rd International
More informationSolar Heating in Commercial Buildings
Washington University in St. Louis Washington University Open Scholarship Mechanical Engineering and Materials Science Independent Study Mechanical Engineering & Materials Science 12-19-2017 Solar Heating
More informationNEED FOR A CORRECT GLASS DESCRIPTIVE CODE: ENERGY-CODING
NEED FOR A CORRECT GLASS DESCRIPTIVE CODE: ENERGY-CODING Carl Axel Lorentzen BSc (Eng) Technical Advisory Service, Pilkington Danmark A/S, Oslo Plads 14, 2100 Copenhagen, Denmark Phone +45 35426600, Fax
More informationOptimum Design Parameters of Box Window DSF Office at Different Glazing Types under Sub Interval of Intermediate Sky Conditions (20-40 klux)
Optimum Design Parameters of Box Window DSF Office at Different Glazing Types under Sub Interval of Intermediate Sky Conditions (20-40 klux) O.K Elayeb a, M.A. Alghoul b,c, *, K. Sopian a, *, N.G. Khrit
More informationDAYLIGHTING PERFORMANCE OF TOPLIGHTING SYSTEMS IN THE HOT AND HUMID CLIMATE OF THAILAND
DAYLIGHTING PERFORMANCE OF TOPLIGHTING SYSTEMS IN THE HOT AND HUMID CLIMATE OF THAILAND Siritip Harntaweewongsa and Liliana O. Beltrán, Ph.D. Texas A&M University College of Architecture College Station,
More informationWe ve cracked the code to harness the sun
We ve cracked the code to harness the sun FUSION 3.3 ft. 6.6 ft. Wire mesh fall protection. FUSION photovoltaic panel requires only one 0.5 diameter opening inside the sealed boot. That s smaller than
More informationSOLAR PHOTOVOLTAIC ASI GLASS E. ASI Glass. Integrated Architecture Powered by the Sun
SOLAR PHOTOVOLTAIC ASI GLASS E Integrated Architecture Powered by the Sun BIPV Building Integrated Photovoltaics with All the benefits of glass plus integrated solar power Whether a facade or a roof, today
More informationCOMPARISON OF ENERGY USE INDICATORS OF A NON-RESIDENTIAL PASSIVE HOUSE WITH ASHRAE 90.1 BUDGET BUILDING
COMPARISON OF ENERGY USE INDICATORS OF A NON-RESIDENTIAL PASSIVE HOUSE WITH ASHRAE 90.1 BUDGET BUILDING ABSTRACT F. Bagheri 1, M. Fakoor 1, B. Young 1, C. Cranswick 1 1 BC Building Science Ltd. 611 Bent
More informationDesign and retrofitting of a hybrid building in Athens
International Conference Passive and Low Energy Cooling 597 Design and retrofitting of a hybrid building in Athens A. Gavalas Gavalas Architects, Athens ABSTRACT This paper s aim is to present a building
More informationINCREASE THE VALUE AND COMFORT OF YOUR HOME. Saving Energy, Saves Money. and lower monthly costs with energy efficiency features.
The 'Energy II Demand-side management - Public awareness campaign project is funded by the European Union INCREASE THE VALUE AND COMFORT OF YOUR HOME and lower monthly costs with energy efficiency features.
More informationGuidelines for Design and Construction of Energy Efficient County Facilities
APPENDIX C - DAYLIGHTING The role of daylighting in the total energy balance and performance of a building is a significant one. The admission of useful daylight means that electrical lighting fixtures
More informationASI Glass. Integrated Architecture Powered by the Sun
ASI Glass Integrated Architecture Powered by the Sun BIPV Building Integrated Photovoltaics with ASI Glass All the benefits of glass plus integrated solar power Whether a facade or a roof, today s building
More informationIntroduction to basics of energy efficient building design
Introduction to basics of energy efficient building design Pierre Jaboyedoff Seminar on Energy Efficient & Thermally Comfortable Buildings in Amravati For CRDA, Andhra Pradesh May 2 nd 2017 Indo-Swiss
More informationAssessing the energy performance of modern glass facade systems
Assessing the energy performance of modern glass facade systems Abdelsalam Aldawoud * Architectural Engineering Department, University of Sharjah Sharjah, United Arab Emirates Abstract. The design and
More informationDESCRIPTION OF STRATEGY
May 2009 Daylighting Prepared For: The Los Angeles Community College District DESCRIPTION OF STRATEGY Copyright 2009 Glumac and Gensler. All rights reserved. Daylighting is the controlled admission of
More informationCOOLING LOADS AND OCCUPANT COMFORT IN HIGHLY GLAZED BUILDINGS AND THE EFFECTIVE EVALUATION OF WINDOW RETROFITS
COOLING LOADS AND OCCUPANT COMFORT IN HIGHLY GLAZED BUILDINGS AND THE EFFECTIVE EVALUATION OF WINDOW RETROFITS S. Armstrong ABSTRACT Urban centres contain thousands of mid to late 20th century commercial,
More informationProblem statement Definition and concepts Research model and methods Climate-responsive categorization Summary. Contents.
Contents Problem statement Definition and concepts Research model and methods Climate-responsive categorization Summary Problem statement Highly conditioned buildings VS. Climateresponsive buildings Building
More informationRadical POTENTIAL!! COMFORT ZONE WHAT IS IT? WHAT DOES IT HAVE TO DO WITH GREEN BUILDING + ZERO CARBON?
Radical POTENTIAL!! COMFORT ZONE WHAT IS IT? WHAT DOES IT HAVE TO DO WITH GREEN BUILDING + ZERO CARBON? Where is your Comfort Zone? This famous illustration is taken from Design with Climate, by Victor
More informationCOPYRIGHTED MATERIAL. Contents Overview WHAT'S IN THE SWL PRINTED WHAT'S IN THE SWL ELECTRONIC I NAVIGATION 20 VIII DETAILED DESIGN STRATEGIES E.
WHAT'S IN THE SWL PRINTED I NAVIGATION 20 SWL Printed Contents SWL Electronic Contents Additional Navigation Methods II USING SUN, WIND & LIGHT 50 Buildings and Energy Use Design Decision Chart for Net-Zero
More informationThe Elithis Tower is an experimental and demonstration. Elithis Tower in Dijon, France. nzeb case studies
COM Elithis Tower in Dijon, France Elithis Tower, located in Dijon, France, provides strong evidence that net zero energy office buildings are achievable in near future. The building, which was designed
More informationCHAPTER 6 CONCLUSION
255 CHAPTER 6 CONCLUSION This study thoroughly assessed the design principles employed in simple, durable and eco-friendly vernacular dwellings in the coastal regions of Tamil Nadu and their effectiveness
More informationInternational Journal of Advance Engineering and Research Development
Scientific Journal of Impact Factor (SJIF): 4.72 International Journal of Advance Engineering and Research Development Volume 4, Issue 2, February -2017 e-issn (O): 2348-4470 p-issn (P): 2348-6406 Optimization
More informationPerformance of Glazing Materials for Atrium in Hot & Humid Climate
Performance of Glazing Materials for Atrium in Hot & Humid Climate 1 Suhendri, Wahri Sunanda 2 and Rachmawan Budiarto 3 1 Institut Teknologi Bandung, Architecture Program, Bandung, Indonesia 2 Universitas
More informationSound insulation Capillary slabs decouple the panes of the insulating glazing and provide improved sound insulation.
OKAPANE light diffusing insulating panels The challenge for OKAPANE light diffusing insulating panels: to make daylight usable and considerably reduce heat losses. With the use of a translucent light diffusing
More informationTHE PARAMETERS EFFECT ON SUSTAINABLE BUILT ENVIRONMENT DESIGN
THE PARAMETERS EFFECT ON SUSTAINABLE BUILT ENVIRONMENT DESIGN M. Tolga Akbulut 1, Dilek Ekþi Akbulut 1, Gül Koçlar Oral 2 1 Faculty of Architecture, Yýldýz Technical University, Turkey, 2 Faculty of Architecture,
More informationBioclimatic Design Approach Integration into Architectural Design: a Library Case Study
PLEA 2016 Los Angeles - 36 th International Conference on Passive and Low Energy Architecture. Cities, Buildings, People: Towards Regenerative Environments Bioclimatic Design Approach Integration into
More informationFEDERATION TOWER MOSCOW DIFFERENT ROOM CLIMATES UNDER ONE ROOF
FEDERATION TOWER MOSCOW DIFFERENT ROOM CLIMATES UNDER ONE ROOF Oliver Baumann 1, and Claudius Reiser 1/2 1 Ebert & Baumann Consulting Engineers, Washington, D.C. 2 Ebert-Ingenieure GmbH &Co. KG, Munich,
More informationFacade Design for Super High- Rise Building in Subtropic Region in China
Facade Design for Super High- Rise Building in Subtropic Region in China Super high-rise building will always be iconic elements at any location. Accompanied by the growth of building technology and urbanization,
More informationDesigning carbon neutral schools: The Victor Miller Building, a critical review
Designing carbon neutral schools: The Victor Miller Building, a critical review Daniela BESSER 1 Lucelia RODRIGUES 1 Benson LAU 1 1 School of the Built Environment UK ABSTRACT: Nowadays, one of the UK
More informationMaking Daylighting Work Applying Cx to Improve the Design and Implementation Process
Making Daylighting Work Applying Cx to Improve the Design and Implementation Process the weidt group collaboration analysis research Jason Steinbock jasons@twgi.com The Deringer Group Joseph Deringer,
More informationSOLAR ENGINEERING OF THERMAL PROCESSES
SOLAR ENGINEERING OF THERMAL PROCESSES Second Edition JOHN A. DUFFIE Emeritus Professor of Chemical Engineering WILLIAM A. BECKMAN Professor of Mechanical Engineering Solar Energy Laboratory University
More informationEnvironmentally Responsive School Buildings in the UK
PLEA2013-29th Conference, Sustainable Architecture for a Renewable Future, Munich, Germany 10-12 September 2013 Environmentally Responsive School Buildings in the UK MEITAL BEN DAYAN 1 1 Environment and
More informationEnvironmental Stewardship Conservation
Environmental Controls Professor Robert Young Group 1 Environmental Stewardship Conservation Current energy crises have brought to the attention of the general population the significant need to raise
More informationBetter Daylight and Natural Ventilation by Design
Plea24- The 21th Conference on Passive and Low Energy Architecture. Eindhoven, The Netherlands, 19-22 September 24 Page 1 of 5 Better Daylight and Natural Ventilation by Design Edward Ng 1 and Nyuk Hien
More informationSOPHARMA AND LITEX TOWERS Hi-tech intelligent building where light, architecture and sustainability meet business
European Nearly Zero Energy Buildings Conference 28 February 1.March 13, Wels/Austria Summary SOPHARMA AND LITEX TOWERS Hi-tech intelligent building where light, architecture and sustainability meet business
More informationNATIONAL TECHNICAL UNIVERSITY OF ATHENS School of Electrical and Computer Engineering. Lighting Controls. Lambros T. Doulos.
NATIONAL TECHNICAL UNIVERSITY OF ATHENS School of Electrical and Computer Engineering Lighting Controls Lambros T. Doulos Energy management Electric lighting consumes a significant amount of energy. About
More informationEnergy Efficient Museum Buildings
Energy Efficient Museum Buildings Helmut F.O. Mueller 1 * 1 Department of Environmental Architecture, Faculty of Building Sciences, Technische Universität (TU) Dortmund, Dortmund, Germany, Green Building
More informationTwo Examples for Corporate Identity by intelligent building design
Two Examples for Corporate Identity by intelligent building design Economical and publicity aspects to build a sustainable low energy office building Matthias Schuler, Prof. Dr. Thomas Lechner TRANSSOLAR
More informationSimulation of Dynamic Daylighting and Glare Control Systems for a Six-Story Net-Zero Energy Office Building in Seattle, WA
Simulation of Dynamic Daylighting and Glare Control Systems for a Six-Story Net-Zero Energy Office Building in Seattle, WA CHRISTOPHER MEEK, Research Assist. Professor AMANDA BRUOT, MS Dc Candidate LOUIE
More informationUNIT FOUR SOLAR COLLECTORS
ME 476 Solar Energy UNIT FOUR SOLAR COLLECTORS Concentrating Collectors Concentrating Collectors 2 For many applications it is desirable to deliver energy at temperatures higher than those possible with
More informationPASSIVE HEATING STRATEGIES. Ball State Architecture ENVIRONMENTAL SYSTEMS 1 Grondzik 1. Natural Solar
PASSIVE HEATING STRATEGIES Ball State Architecture ENVIRONMENTAL SYSTEMS 1 Grondzik 1 Natural Solar Nature does not rely on fragile pumps, & fans, arrays of gauges & dials, or elaborate tracking collectors
More informationSoCal Dynamic Dome Skylight SECTION UNIT SKYLIGHTS
VELUX SECTION 08 62 00 PART 1 - GENERAL 1.1 SECTION INCLUDES A. Dynamic dome unit skylight with formed curb counterflashing for mounting on site-built or prefabricated roof curbs, for flat, low-slope and
More informationSolar Control. Pilkington Solar Control range
Solar Control Pilkington Solar Control range Contents Energy efficiency in buildings Solar Control How it works Low-emissivity How it works Introduction to the Pilkington Solar Control range Coated Glass
More informationDesign of Green Building
Sumit Kumar, Abhinav Singh Abstract The 4th Assessment Report from the Intergovernmental Panel on Climate Change (IPCC) has shown that buildings have the highest potential to reduce carbon emissions. This
More informationMorphology of a canopy as a preservation structure
Structural Studies, Repairs and Maintenance of Heritage Architecture XI 315 Morphology of a canopy as a preservation structure I. Markov & P. Bhiwapurkar School of Architecture, Rensselaer Polytechnic
More informationOVERALL PERFORMANCE OF VENTILATED DOUBLE FAÇADES COMPARED TO A STATE OF THE ART SINGLE SKIN FAÇADE
OVERALL PERFORMANCE OF VENTILATED DOUBLE FAÇADES COMPARED TO A STATE OF THE ART SINGLE SKIN FAÇADE J.H.A. Verdonschot, G. Boxem, and W. Zeiler, Technical University of Eindhoven, the Netherlands ABSTRACT
More informationInternational Journal of Scientific & Engineering Research Volume 9, Issue 1, January ISSN
International Journal of Scientific & Engineering Research Volume 9, Issue 1, January-2018 131 Design for appropriate size of fixed skylight in Famagusta, Cyprus Aisha Mahmud Umar, Halil Zafer Alibaba
More information