Pilot project: DUTH Student residences, Komotini, Greece. Detailed technical and financial action plans for each individual building block

Transcription

1 MED Programme Priority-Objective 2-2: Promotion and renewable energy and improvement of energy efficiency Contract n. IS-MED Pilot project: DUTH Student residences, Komotini, Greece Detailed technical and financial action plans for each individual building block Territorial technical and financial action plan for the pilot project Innovative techniques, materials and processes Diagnosis and elaboration of an action plan for each pilot project Authors: - Centre of Renewable Sources and Saving (CRES) - Democritus University of Thrace (DUTH) Region of East Macedonia and Thrace Status: final

2 CONTENTS 1.0 INTRODUCTION OBJECTIVES OF PILOT ENERGY REFURBISHMENT APPROACH DIAGNOSIS OF EXISTING PILOT BUILDINGS OVERVIEW OF PILOT PROJECT BUILDING ENVELOPE BUILDING SERVICES SYSTEMS DESCRIPTION PER BUILDING BUILDING S BUILDING S BUILDING S BUILDING S BUILDING S DIAGNOSIS OF ENERGY PERFORMANCE OF PILOT BUILDINGS INTRODUCTION ENERGY ANALYSIS METHODOLOGY INPUTS RESULTS ENERGY ANALYSIS OF REFURBISHMENT SCENARIOS REFURBISHMENT SCENARIOS INPUTS RESULTS TECHNICAL AND FINANCIAL ACTION PLANS IMPLEMENTATION OF THE ACTION PLANS...27

3 1.0 INTRODUCTION This report presents the diagnosis process that was undertaken for the ELIH-MED pilot project in Greece, the analysis that was carried out of the energy performance of the pilot buildings, leading to the identification of the most cost-effective energy refurbishment solutions and the elaboration of a technical and financial action plan for the pilot buildings energy refurbishment. The 3 Greek partners participating in the ELIH-MED project are: the Centre of Renewable Sources and Saving (CRES), the Democritus University of Thrace (DUTH) and the Region of East Macedonia and Thrace (REMTH). The pilot project in Greece includes the energy refurbishment of the 5 existing Students residences buildings of the Democritus University of Thrace (DUTH) in the campus of Komotini, in the Region of East Macedonia and Thrace. CRES and DUTH elaborated the technical aspects of the pilot project, and all three partners collaborated in identifying the appropriate administrative processes and financial mechanisms to be deployed for the project implementation. As the pilot buildings are located on the same site, and they have nearly identical construction characteristics and type of building services systems, a common approach was used in order to identify the most suitable energy saving interventions and prepare the individual buildings and the overall technical and financial action plans. Therefore, in order to better address the common issues, this report includes both deliverables Detailed technical and financial plans for each individual building block and Territorial technical and financial action plan for the pilot project. 2.0 OBJECTIVES OF PILOT ENERGY REFURBISHMENT The principal objective of the energy refurbishment of the pilot project is to achieve, through the implemented energy interventions, a reduction in operational energy consumption, measureable using the following targets: Rise of two categories of Rating (using National Legislation) or Primary energy consumption savings of ~35-40% In parallel to the above main objectives, the aim is for the pilot energy refurbishment to contribute towards the following: Improvement of thermal comfort conditions and quality of life of the occupants and users of the buildings Reduction of operational energy costs Reduction of the buildings environmental impact through reduced greenhouse gas emissions for their operation Information and awareness raising of the buildings occupants regarding energy-efficiency, energy-saving and environmental issues

4 3.0 APPROACH The process followed in order to develop the individual pilot buildings technical and financial action plans, as well as the overall pilot project action plan for energy refurbishment, broadly included the following steps: Diagnosis of existing characteristics of the 5 pilot buildings Diagnosis of energy performance of the pilot buildings analysis assessing the technical and cost impact of a number of energy refurbishment scenarios Development of the technical and financial action plan per building and for the whole project Preparation of technical specifications and detailed budget, to include in the Call for Tender Preparation of the timetable for implementation The process and outcomes are analysed in the chapters that follow. 4.0 DIAGNOSIS OF EXISTING PILOT BUILDINGS To undertake the diagnosis of the existing buildings characteristics, information was collected from the following sources: Architectural and building services design drawings (the full pack of drawings was not available due to more than 20yrs from the time the buildings were designed) Information collected from on-site visits to the pilot buildings and from on-site energy audits by CRES. During the energy audits, the building features were recorded in detail and photographic evidence taken. Information collected from discussions and walkarounds with the buildings manager and technical personnel responsible for the buildings maintenance and operation Information collected from discussions with the Technical Department of DUTH (original designers of the buildings) All five buildings have very similar construction characteristics and building services systems, therefore in the description that follows, common features are outlined first, followed by features of the individual buildings.

5 4.1 OVERVIEW OF PILOT PROJECT The pilot project includes the energy refurbishment of the 5 existing Students residences buildings (buildings S1, S2, S3, S4, S5) of the Democritus University of Thrace (DUTH) in the campus of Komotini, in the Region of East Macedonia and Thrace. The total floor area of the 5 pilot buildings is 12,863m 2 and they provide accommodation for a total of 700 students. The location of the campus is characterised as peri-urban (on the edge of the city of Komotini, approx. 5klm northwest of the city centre). The site plan below illustrates the location of the 5 pilot buildings on the site. Building S1 Building S3 Building S4 Building S2 Building S5 The 5 pilot building blocks are 2-3 storey and they contain in total 630 student flats (560 one-person and 70 two-person flats). Each flat includes its own bathroom, and there are communal kitchens on each floor as well as other communal areas. Due to the nature of student residence buildings (including shared kitchens and communal areas), each pilot building is treated as a building block and the student flats are not treated as individual dwellings. Therefore for the purposes of the ELIH- MED project and the analysis that follows in this report, there are 5 pilot building blocks.

6 The table below summarises the buildings accommodation breakdown: Building name Floor area Building permit was obtained in 1985 and the buildings were constructed in The construction of the buildings consists of a reinforced concrete structural frame, masonry walls with a single layer insulating brickwork, pitched concrete roofs with ceramic tiles, and timber-framed double glazed windows. Space heating and domestic hot water are provided using a centralized oil boiler for each building, controlled on a central timer. There are no further automations/controls, and no cooling provision (except for a limited number of split units for few office areas). Socio-economic characteristics 1-person flats 2-persons flats Total No of flats Total No of occupants (m 2 ) S S S S S Total The Student residences are public buildings owned and managed by the Democritus University of Thrace. The buildings follow in principle the model of low-income social housing buildings since they are occupied by students that have been selected according to social and financial criteria e.g. financial status as demonstrated through annual tax declaration form of students and their parents, family status, number of siblings studying away from home etc. Priority is given to low-income families, singleparent students etc. Students in the halls of residence of Komotini attend one of the following University programs: Physical Education & Sport Sciences; Law; Social Administration; Greek Philology; History and Ethnology; Language, Literature and Culture of the Black Sea Countries; International economic relations and development. The selection of residents for the Student halls is reviewed on an annual basis. Students can reside in the buildings between 1 and 6 years; typically they stay for 3-4 years.

7 Below are representative photos of the 5 pilot buildings: Building S1 Building S2 Building S3 Building S4 Building S5

8 4.1.1 BUILDING ENVELOPE External walls The construction of the buildings uses a reinforced concrete frame (slabs, columns, beams) and masonry. Masonry consists of a single layer of insulating brickwork (type Poroton ). It is estimated that bricks are of dimensions 12x14x25mm across the whole surface of walls. There is a reinforced concrete frame 25cm deep, covered by light-coloured plaster internally and externally. Even though the original architectural drawings depict a layer of within the external walls (shown as cavity walls), the on-site measurements as well as information collected from the original design team suggest that the actual as-built construction did not fully align with the design drawings. In addition, due to the long age of construction (over 20yrs), the condition of any existing is unknown. Furthermore, the Greek thermal regulations (1979) valid at the time of construction of these buildings, was superseded in 2010 by the new Building Regulations (KENAK), posing more stringent requirements on external elements. Therefore the building external walls (masonry) have been considered insufficiently insulated against the previous as well as current regulations, whilst the structural frame has been considered as uninsulated. Roofs The buildings roofs are pitched timber roofs (20-30 o pitch) on rafters, covered with red ceramic tiles, constructed above the flat top floor concrete slabs, with a roof void in between. The roof void is continually ventilated naturally through shafts. Despite a layer of being depicted above the top floor slab on the architectural drawings, due to deviations observed and lack of information on potential existing, as well as due to the continually ventilated air void above all roof slabs, it has been considered that the building roofs are insufficiently insulated against both previous as well as current thermal regulations.

9 Ground floors The buildings ground floor slabs are reinforced concrete slabs, 15cm deep, either based directly on the ground or being suspended from ground by 0.15m-1m. Despite a layer of being depicted below the ground floor slab on the architectural drawings, due to deviations observed and lack of information on potential existing and its condition after 20 years, it has been considered that the ground floor slabs are uninsulated. Exposed floors on pilotis The buildings contain certain areas of exposed floors (1 st floor slabs) above pilotis. These slabs are 15cm deep, and as shown on the architectural drawings, they are not insulated. Windows On the buildings facades there are in total 19 types of windows and doors. 12 of these types are timber-frame double-glazed windows and doors, and 7 types are metal-frame doors, either double glazed or solid doors.

10 4.1.2 BUILDING SERVICES SYSTEMS The systems below are in operation in the pilot buildings when they are occupied. The buildings remain closed in the summer period, between 15/07 to 31/08. Heating system The heating season in Komotini is typically between October and April, which is when the heating system is in operation. All internal areas of the buildings are heated, except for the boiler rooms. There are five boiler rooms, one at the ground floor level of each building. Heating is through a conventional high-temperature oil boiler, located within each boiler room, with its ancillary systems (e.g. pumps). The boilers control is either manual or on a timer. The boilers are well insulated. There is an internal hot water distribution pipework within the buildings, not adequately insulated (damaged/insufficient in certain areas). The terminal units are high temperature radiator panels, located mostly along external elevations. There is no control of the terminal units, or any type of zone control throughout the building. Domestic Hot Water (DHW) system The requirement for DHW in the halls of residence is throughout the year, except for the summer holiday period between 15/07 to 31/08 (approx.) when the buildings are not occupied. DHW in the buildings is generated through the same oil boilers as used for space heating. It is stored within insulated storage cylinders, and is distributed to the buildings through insufficiently insulated distribution pipework, with recirculation. There is within each boiler room, installed pipework reaching the storage cylinders, for future incorporation of solar hot water heating.

11 Ventilation and Cooling system The occupied areas of the building are ventilated naturally through openable windows, and no cooling is provided, apart from a limited number of rooms (e.g. office / administration rooms etc.) where some split units are used. Lighting system Internal lighting of the buildings is of two main types: Student rooms lighting: each room includes 3 conventional incandescent light bulbs 75W each and 2 linear fluorescent luminaires with lamps 36W each. Lighting of circulation corridors and communal areas, in its majority includes linear fluorescent luminaires (of different wattage) as well as some circular fluorescent luminaires in stairwells. There is also some security lighting. Lighting control in the rooms is manual, whereas in communal/circulation areas it is controlled by a timer.

12 4.2 DESCRIPTION PER BUILDING All 5 buildings include the common features as described above. What follows is a more specific description per building, of some of the buildings individual features BUILDING S1 Building S1 has a total of 144 student flats, 114 one-person flats and 30 two-person flats. It has a total floor area of 3,055m 2 and consists of two practically independent buildings, linked by an enclosed bridge construction at first floor level. The building is mostly 3-storey (ground +2), with only certain sections of it being 2-storey or onestorey above pilotis. There is total of 48m 2 of exposed floors above pilotis. The building contains student flats, circulation corridors, communal lounges/kitchens, as well as a cantine on the ground floor serving all buildings, and some office type spaces at ground floor. The total area of windows & doors is ~433m 2, representing ~13% of the total area of the building s elevations. There are 13 types of openings, 9 of these are timber-frame windows & doors (satisfactory thermal performance but poor air tightness) and 4 are metal-frame doors (poor thermal performance and air tightness). All internal spaces are heated, except for the boiler room. All areas are served by the same heating system, using an oil boiler located in the ground floor boiler room. The boiler capacity is 400,000kcal/h and the burner is in good condition. The boiler is well

13 insulated, however the of the distribution pipework appears insufficient, due to non-continuous along certain sections of it, damaged etc. DHW is generated through the same oil boiler as for space heating. DHW is stored in 2 storage tanks of 1,500lt capacity, and distributed throughout the building via distribution pipework with recirculation. The pipework is insufficiently insulated. There is already installed pipework within the plantroom, for future retrofit of a solar hot water system. There is a local split unit serving an office area adjacent to the cantine at ground floor, and no other cooling system in the building. Internal lighting for the rooms is of a total installed power of ~44.3kW whereas for the communal areas and circulation the total installed power is ~8.3kW BUILDING S2 Building S2 has a total of 155 student flats, 115 one-person flats and 40 two-person flats. It has a total floor area of 3,359m 2 being the largest of the five pilot buildings in terms of floor areas. It consists of two practically independent buildings, linked by an enclosed bridge construction at first floor level. The building is mostly 3-storey (ground +2), with only certain sections of it being 2-storey or one-storey above pilotis. There is total of 57m 2 of exposed floors above pilotis. The building contains student flats, circulation corridors, communal lounges/kitchens, as well as some

14 office/administration use areas. The total area of windows & doors is ~518m 2, representing ~15% of the total area of the building s elevations. There are 13 types of openings, 9 of these are timber-frame windows & doors (satisfactory thermal performance but poor air tightness) and 4 are metal-frame doors (poor thermal performance and air tightness). All internal spaces are heated, except for the boiler room. All areas are served by the same heating system, using an oil boiler located in the ground floor boiler room. The boiler capacity is 420,000kcal/h and the burner is in good condition. The boiler is well insulated, however the of the distribution pipework appears insufficient, due to non-continuous along certain sections of it, damaged etc. DHW is generated through the same oil boiler as for space heating. DHW is stored in 2 storage tanks of 1,500lt capacity, and distributed throughout the building via distribution pipework with recirculation. The pipework is insufficiently insulated. There is already installed pipework within the plantroom for future retrofit of a solar hot water system. There is a local split unit serving an administration use area at ground floor, and no other cooling system in the building. Internal lighting for the rooms is of a total installed power of ~48kW whereas for the communal areas and circulation the total installed power is ~10kW BUILDING S3

15 Building S3 has a total of 78 student flats, all being one-person flats. It has a total floor area of 1,464m 2 being the smallest of the five pilot buildings in terms of floor areas. The building is mostly 3-storey (ground +2) with a small section of it being one-storey above pilotis. There is a total of 21m 2 of exposed floors above pilotis. The building contains student flats, circulation corridors, communal lounges/kitchens, as well as some office/administration use areas. The total area of windows & doors is ~224m 2, representing ~13% of the total area of the building s elevations. There are 8 types of openings, 6 of these are timber-frame windows & doors (satisfactory thermal performance but poor air tightness) and 2 are metal-frame doors (poor thermal performance and air tightness). All internal spaces are heated, except for the boiler room. All areas are served by the same heating system, using an oil boiler located in the ground floor boiler room. The boiler capacity is 200,000kcal/h and the burner is in good condition. The boiler is well insulated, however the of the distribution pipework appears insufficient, due to non-continuous along certain sections of it, damaged etc. DHW is generated through the same oil boiler as for space heating. DHW is stored in 2 storage tanks of 1,000lt capacity, and distributed throughout the building via distribution pipework with recirculation. The pipework is insufficiently insulated. There is already installed pipework within the plantroom, for future retrofit of a solar hot water system. There is a local split unit serving an administration use area at ground floor, and no other cooling system in the building. Internal lighting for the rooms is of a total installed power of ~48kW whereas for the communal areas and circulation the total installed power is ~10kW.

16 4.2.4 BUILDING S4 Building S4 has a total of 138 student flats, all being one-person flats. It has a total floor area of 2,759m 2. It consists of two practically independent buildings, linked by an enclosed bridge construction at first floor level. The building is mostly 3-storey (ground +2), with certain sections of it being 2-storey or one-storey above pilotis. There is a total of 174m 2 of exposed floors above pilotis. The building contains student flats, circulation corridors, communal lounges/kitchens, as well as some office/administration use areas at ground floor. The total area of windows & doors is ~400m 2, representing ~12% of the total area of the building s elevations. There are 12 types of openings, 8 of these are timber-frame windows & doors (satisfactory thermal performance but poor air tightness) and 4 are metal-frame doors (poor thermal performance and air tightness). All internal spaces are heated, except for the boiler room. All areas are served by the same heating system, using an oil boiler located in the ground floor boiler room. The boiler capacity is 400,000kcal/h and the burner is in good condition. The boiler is well insulated, however the of the distribution pipework appears insufficient, due to non-continuous along certain sections of it, damaged etc. DHW is generated through the same oil boiler as for space heating. DHW is stored in 2 storage tanks of 1,500lt capacity, and distributed throughout the building via distribution pipework with recirculation. The pipework is insufficiently insulated. There

17 is already installed pipework within the plantroom, for future retrofit of a solar hot water system. There are two local split units serving office/administration rooms at ground floor, and no other cooling system in the building. Internal lighting for the rooms is of a total installed power of ~42.3kW whereas for the communal areas and circulation the total installed power is ~47.4kW BUILDING S5 Building S5 has a total of 115 student flats, all being one-person flats. It has a total floor area of 2,226m 2. It consists of two practically independent buildings, linked by an enclosed bridge construction at first floor level. The building is mostly 3-storey (ground +2), with certain sections of it being 2-storey or one-storey above pilotis. There is a total of 13m 2 of exposed floors above pilotis. The building contains student flats, circulation corridors, communal lounges/kitchens, as well as some office/administration use areas. The total area of windows & doors is ~374m 2, representing ~13% of the total area of the building s elevations. There are 14 types of openings, 10 of these are timber-frame windows & doors (satisfactory thermal performance but poor air tightness) and 4 are metal-frame doors (poor thermal performance and air tightness).

18 All internal spaces are heated, except for the boiler room. All areas are served by the same heating system, using an oil boiler located in the ground floor boiler room. The boiler capacity is 320,000kcal/h and the burner is in good condition. The boiler is well insulated, however the of the distribution pipework appears insufficient, due to non-continuous along certain sections of it, damaged etc. DHW is generated through the same oil boiler as for space heating. DHW is stored in 2 storage tanks of 1,500lt capacity, and distributed throughout the building via distribution pipework with recirculation. The pipework is insufficiently insulated. There is already installed pipework within the plantroom, for future retrofit of a solar hot water system. There are two local split units serving office/administration rooms at ground floor, and no other cooling system in the building. Internal lighting for the rooms is of a total installed power of ~35.5kW whereas for the communal areas and circulation the total installed power is ~41kW.

19 5.0 DIAGNOSIS OF ENERGY PERFORMANCE OF PILOT BUILDINGS 5.1 INTRODUCTION On the basis of the information collected and summarised in the previous section, the initial indications concerning the pilot buildings energy performance are: There is a thermally inefficient building envelope, with significant thermal losses in winter There is insufficient control of the space heating system, not accounting for the different heating loads per space/orientation -consuming lighting (incandescent lamps) are used in all student rooms Conventional oil boilers are used to provide Domestic Hot Water, even though the installed systems and pipework could support the retrofit of a solar hot water system To assess the energy performance of each pilot building, detailed energy analysis has been undertaken, the process for which is described in the following sections. 5.2 ENERGY ANALYSIS METHODOLOGY The methodology that was used for the energy analysis is in line with the Greek -Efficiency Building Regulations (KENAK), and the provisions of the corresponding KENAK Technical Guidelines 1, 2, 3, and 4 (TOTEE 20701/2010). The software used for the analysis was TEE-KENAK, which is the approved National simulation in Greece for energy assessments and energy certification, in line with the KENAK Building Regulations. The methodology takes into account a number of parameters so as to predict the building s overall energy performance: Location climatic characteristics Building geometry Building envelope constructions and thermal properties Building services systems and their efficiencies (heating, cooling, ventilation, lighting) serving the different building areas Type of controls for the systems operation 5.3 INPUTS The tables below summarise the main inputs that were used in the energy performance analysis of each pilot building. Where information was unknown or insufficient on actual installed building elements or systems, parameters have been calculated using the methodology described within the KENAK Technical Guidelines or taken from relevant recommended tables.

20 Inputs for energy analysis Building S1 Geometry Building S2 Building S3 Building S4 Building S5 Total floor area (m 2 ) 3,055 3,559 1,464 2,759 2,226 Number of student flats 144 (114 one-person, 30 twopersons) 155 (115 one-person, 40 twopersons) 78 (oneperson) 138 (oneperson) 115 (oneperson) Number of occupants Heated area (m 2 ) 2,990 3,307 1,437 2,694 2,156 Non-heated area (plant rooms) (m 2 ) Total external walls area (excl.windows & doors) (m 2 ) 2,916 2,950 1,522 2,852 2,464 Total windows & doors area (m 2 ) Ground floor area (m 2 ) 1,052 1, Exposed floor area (above pilotis) (m 2 ) External walls (frame + masonry) average U-value (W/m 2 K) Thermal properties Pitched roofs U-value (W/m 2 K) Ground floors U-value (W/m 2 K) Ground floors (suspended) U-value (W/m 2 K) Exposed floors (above pilotis) U-value (W/m 2 K) Windows & doors U-value (varying, depending on % frame, type of frame and glazing) (W/m 2 K) Heating + DHW system (oil boiler) capacity (kcal/h) Building services systems 400, , , , ,000 Heating system efficiency 89% 90% 90% 76% 89% Heating system controls DHW system efficiency 89% (winter) 69% (summer) Controls category D: Central control by timer, no zones or terminal units controls 90% (winter) 68% (summer) 90% (winter) 68% (summer) 76% (winter) 57% (summer) 89% (winter) 67% (summer) DHW annual demand (m 3 ) 2,767 3,100 1,240 2,194 1,823 DHW storage cylinders (lt) 2x1,500 2x1,500 2x1,000 2x1,500 2x1,500 Heating + DHW distribution pipework Rooms total installed lighting power (kw) Communal areas total installed lighting power (kw) Insufficiently insulated

21 5.4 RESULTS After all inputs have been entered into the software, representing the building construction and systems, the simulation is run and results produced on the building s predicted energy performance. The outputs that can be extracted from the software include: The primary energy consumption (kwh/m 2 ) The resulting CO 2 emissions (kgco 2 /m 2 ) The estimated energy running cost (Euros) The building s Rating (energy classes in accordance with the Greek -Efficiency Building Regulations range from A+ to H, equivalent to the A+ to G scale) The table that follows summarises the results of the energy analysis for each of the 5 pilot buildings, in their existing condition prior to energy refurbishment. BEFORE refurbishment Flats No Flat type: 1-bed Flat type: 2-bed Beds No Floor area (m 2 ) Primary energy consumption (kwh/m 2 ) Rating CO 2 emissions (kgco 2 /m 2 ) Running Cost (Euros) Building S D Building S E Building S E Building S E Building S E TOTALS

22 6.0 ENERGY ANALYSIS OF REFURBISHMENT SCENARIOS 6.1 REFURBISHMENT SCENARIOS Using the same energy analysis methodology as described in par.5.2, and after taking into consideration the outcomes of the diagnosis of energy performance of the existing pilot buildings, analysis was undertaken of a number of refurbishment scenarios. Each scenario combined a number of energy saving interventions, considered appropriate for the particular buildings. The seven different scenarios that were assessed are summarised in the table below: Scenario Pilotis Insulation External Walls Insulation Roof Insulation Rooms Incandescent light bulbs replacement Solar Hot Water Collectors Space Heating Controls INPUTS For the energy interventions assessed within each of the above 7 scenarios, the following input parameters have been used, improving the energy performance over the base-case existing buildings performance. All other parameters not included below have remained the same as in the base-case energy analysis (par.5.3). -saving interventions Pilotis External Walls Roof Insulation Rooms incandescent light bulbs replacement Solar Hot Water Collectors Space Heating Controls Performance criterion Exposed floors (above pilotis) U-value (W/m 2 K) External walls (frame + masonry) average U- value (W/m 2 K) Pitched roofs U-value (W/m 2 K) Rooms installed lighting power (W) Type of system Controls category / description Existing (base-case) performance Improved performance [3 x 75W incand. lamps + 2 linear fluorescent 36W lamps] per room No solar collectors D (central control by timer, no zones or terminal units control) [3 x 15W CFL lamps + 2 linear fluorescent 36W lamps] per room Roof-mounted selective plate collectors (15 o tilt, East facing in S2-S5, South facing in S1) C (central control by timer, controls at room level through thermostats and radiator valves)

23 6.3 RESULTS The tables below summarise the results of the energy analysis undertaken for each of the pilot buildings, assessing the different scenarios. For each scenario, the improvement in energy performance has been assessed through assessing the two criteria set by the ELIH-MED project: - the % saving in primary energy - the difference in energy before and after the proposed interventions The proposed interventions in the various scenarios have been developed on a stepby-step basis, on the basis of achieving the project energy saving targets, with the most cost-effective solutions, within the overall available budget for the pilot works. Flats No Flat type: 1-bed BEFORE REFURBISHMENT Flat type: 2-bed Beds No Floor area (m 2 ) Primary energy kwh/m Rating D heating controls external incadescent solar hot pylotis roof % primary walls lighting water room building heating energy replacement collectors controls (N o central heat (units) meter saving of rooms) ,5 D ,3 D ,3 C ,2 B ,3 B ,1 C 1 Scenario No BUILDING S1 SCENARIOS FOR ENERGY UPGRADES difference Flats No 155 Flat type: 1-bed BEFORE REFURBISHMENT Flat type: 2-bed Beds No Floor area (m 2 ) Primary energy kwh/m 2 Rating E heating controls external incadescent solar hot pylotis roof % primary walls lighting water room building heating energy replacement collectors controls (N o central heat (units) meter saving of rooms) ,4 D ,9 D ,7 C ,4 C ,2 C ,3 C ,2 C 2 Scenario No BUILDING S2 SCENARIOS FOR ENERGY UPGRADES difference Flats No Flat type: 1-bed BEFORE REFURBISHMENT Flat type: 2-bed Beds No Floor area (m 2 ) Primary energy kwh/m 2 Rating E heating controls external incadescent solar hot pylotis roof % primary walls lighting water room building heating energy replacement collectors controls (N o central heat (units) meter saving of rooms) ,2 D ,9 D ,0 C ,9 C ,9 C ,0 C ,5 C 2 Scenario No BUILDING S3 SCENARIOS FOR ENERGY UPGRADES difference Flats No Flat type: 1-bed BEFORE REFURBISHMENT Flat type: 2-bed Beds No Floor area (m 2 ) Primary energy kwh/m 2 Rating E heating controls external incadescent solar hot pylotis roof % primary walls lighting water room building heating energy replacement collectors controls (N o central heat (units) meter saving of rooms) ,0 D ,4 D ,5 C ,2 C ,2 C ,5 C ,5 C 2 Scenario No BUILDING S4 SCENARIOS FOR ENERGY UPGRADES difference Flats No Flat type: 1-bed BEFORE REFURBISHMENT Flat type: 2-bed Beds No Floor area (m 2 ) Primary energy kwh/m 2 Rating E heating controls external incadescent solar hot pylotis roof % primary walls lighting water room building heating energy replacement collectors controls (N o central heat (units) meter saving of rooms) ,6 D ,9 D ,8 C ,2 C ,0 C ,0 C ,2 C 2 Scenario No BUILDING S5 SCENARIOS FOR ENERGY UPGRADES difference

24 7.0 TECHNICAL AND FINANCIAL ACTION PLANS Through the energy analysis of the assessed scenarios, the preferred scenario (combination of energy saving interventions) has been identified for each pilot building, so that the project energy targets are achieved per building, within the overall available budget for the pilot project as a whole. This section summarises the planned interventions and their expected results, in technically and financially. The final preferred scenario identified for each of the pilot buildings is: Building S1: Preferred scenario: 6 Buildings S2, S3, S4, S5: Preferred scenario: 7 The identified set of energy-saving measures to be applied are: External to buildings facades (all buildings) External on exposed floor slabs above pilotis (all buildings) Roof-mounted Solar Thermal system for DHW (all buildings) Incandescent lamps replacement in student rooms (all buildings) Space heating controls (thermostats and radiator valves per room) (building S1 only). Due to budget limitations this measure has not been included in all buildings but only in building S1. In addition to the above main interventions, the following will be included: Central boiler heat flow meters (all buildings) Replacement of limited number of broken glazing within existing window frames (all buildings) The table below summarises the proposed interventions (quantities) for each of the buildings and the totals for the project, referring to the final preferred scenario for each building. Planned Conservation Measures pylotis (m 2 ) external walls (m 2 ) incadescent lighting replacement (units) solar hot water collectors (m 2 ) heating co ntro ls room heating controls (N o of rooms) building central heat meter Building S1 48 2, Building S2 57 2, Building S3 21 1, Building S , Building S5 13 2, TOTALS ,728 1,

25 The following table demonstrates the energy performance of the buildings after the proposed interventions, and the cost assessment of the proposed interventions, for each building and overall for the project. Primary energy consumption (kwh/m 2 ) CO 2 emissions (kgco 2 /m 2 ) AFTER refurbishment % primary energy saving difference % CO 2 emissions saving Investment Cost (Euros) Running Cost (Euros) Payback Period (years) Building S1 403 C ,2 Building S2 464 C ,4 Building S3 490 C ,1 Building S4 446 C ,3 Building S5 492 C ,8 TOTALS ,5 In summary, the improvement in energy performance expected to be achieved through the proposed refurbishment, are shown below, in relation to the ELIH-MED energy targets. It can be seen that all buildings achieve as a minimum one of the two project criteria. BEFORE refurbishment AFTER refurbishment Rating % primary energy saving Building S1 D C 43 1 Building S2 E C 34 2 Building S3 E C 36 2 Building S4 E C 39 2 Building S5 E C 36 2 TECHNICAL AND FINANCIAL ACTION PLAN Planned Conservation Measures AFTER refurbishment pylotis (m 2 ) external walls (m 2 ) incadescent lighting replacement (units) solar hot water collectors (m 2 ) heating controls room heating controls (N o of rooms) building central heat meter Primary energy consumption (kwh/m 2 ) CO 2 emissions (kgco 2/m 2 ) % primary energy saving difference % CO 2 emissions saving Investment Cost (Euros) Running Cost (Euros) Building S C ,2 Building S C ,4 Building S C ,1 Building S C ,3 Building S C ,8 TOTALS ,5 Payback Period (years)

26 The following table shows a different breakdown of the overall cost of energy refurbishment, providing an indication of the total cost per energy conservation measure. Costs related to the public tendering process in Greece are included as a separate cost line. In addition to the cost of the actual energy saving interventions, the overall cost of monitoring/metering equipment provided under WP6 has been included (procured through a separate Call for Tender to the main refurbishment works). More details regarding these provisions are included as part of the WP6 deliverables. Planned Pilot Project Measures Investment cost ( ) Conservation Measures Exposed floors above pilotis External walls Space heating controls Solar Thermal System (roof-mounted collectors) Replacement of room's incandescent lamps with CFL (+ Replacement of limited area of broken window glazing) Total Other costs (in line with Greek laws for public tenders) e.g. contractor's profit etc VAT (23%) Total DUTH budget additional WP6 costs [Central electricity metering system for each building + electricity meters for 6 rooms + internal/external temperature data loggers] CRES budget Total Cost

27 8.0 IMPLEMENTATION OF THE ACTION PLANS After finalising the technical and financial action plan for each building and the overall plan for the pilot project, the necessary process has been established and a timetable prepared in order to ensure the plans implementation. The timetable is being monitored by the project partners and regularly updated with the progress of activities. Currently the timetable stands as follows: Tender Documents preparation: Based on the proposed technical and financial plans, the detailed technical specifications have been prepared for the planned energy refurbishment interventions, the bills of quantities for materials and equipment, and the detailed budget for the overall pilot works finalised in April 2013 Refurbishment works permit: The proposals for the refurbishment works (design reports and drawings) were submitted to Komotini s Municipal Planning Authority, for obtaining refurbishment works permit submission in April 2013, works permit awarded in June 2013 Administrative procedures for Tender approval: The finalised Tender Documents were submitted to the DUTH Technical Board for approval (as the Contracting Authority), including the amended ELIH-MED subsidy contract and the co-financing agreement obtained by the Greek National Authority. he proposals for the refurbishment works (design reports and drawings) were submitted to Komotini s Municipal Planning Authority, for obtaining refurbishment works permit Tender approved by DUTH Technical board in May 2013 Launch of Call for Tender: Tender Call launched by DUTH on 02/07/2013. Closing date for tender submissions 16/07/2013 Selection of provider expected by end of August 2013 Start of refurbishment works: expected by September 2013