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Energy Saving Projects in Municipal Buildings
Published on 14 November 2018
Greece
Kentriki Makedonia
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About this good practice
The City Hall (CH) and the Cultural Center (CC) have been selected both for energy consumption reasons and because of the high-circulation of people in them. The interventions that have been implemented are:
•Replacement of old glazing and window frames (CH-CC) by new opening-type ones (406m2), with reclining features, having a coefficient U=-2.5 W/(m K²). The new glass panels have a double thermal insulation, blocking out the noise, are reflective, with low-emissivity (low-e), and presenting a U=1.4 W/(m K²) versus 3.4 W/(m K²) of the old ones. Windows are now electrically opened, while a sun-protection system has been placed (shading), with adjustable aluminum shades, through the electrical mechanism. In the Office area of the CC internal insulation was placed.
•Both buildings are now heated using weather compensation sensors and independent indoor temperature control (CH-CC) through a central heating system, of a gas boiler and steel radiators (III 905) at each room.
•Replacement of lighting fixtures (CH) by new with electronic ballast, reflector and sensor.
•Installation of a Green Roof-extensive type (CH), while the system features layers of materials are:
-New waterproofing membrane, of modified polyolefin bags certified for root-growth protection.
-Special protective membrane sheet of high strength.
-Drainage/water storage system
-Special geo-textile separator
-Special soil substrate
-Plants
-A drip irrigation system
•Replacement of old glazing and window frames (CH-CC) by new opening-type ones (406m2), with reclining features, having a coefficient U=-2.5 W/(m K²). The new glass panels have a double thermal insulation, blocking out the noise, are reflective, with low-emissivity (low-e), and presenting a U=1.4 W/(m K²) versus 3.4 W/(m K²) of the old ones. Windows are now electrically opened, while a sun-protection system has been placed (shading), with adjustable aluminum shades, through the electrical mechanism. In the Office area of the CC internal insulation was placed.
•Both buildings are now heated using weather compensation sensors and independent indoor temperature control (CH-CC) through a central heating system, of a gas boiler and steel radiators (III 905) at each room.
•Replacement of lighting fixtures (CH) by new with electronic ballast, reflector and sensor.
•Installation of a Green Roof-extensive type (CH), while the system features layers of materials are:
-New waterproofing membrane, of modified polyolefin bags certified for root-growth protection.
-Special protective membrane sheet of high strength.
-Drainage/water storage system
-Special geo-textile separator
-Special soil substrate
-Plants
-A drip irrigation system
Resources needed
Project’s budget: 411.472,14 € funded by the Municipal Energy Savings Program “Exoikonomo” (=Save).
Evidence of success
Annual energy saving:
-Replacement of luminaries in CH: 38.458 kWh/year
-Installation of green roof in CH: 5,302 l oil or 53,075 kWh. The coefficient of thermal permeability of the un-insulated roof before planting is estimated at 3.2 W/m2K and after planting at 1.2 W/m2K
-Replacement of old glazing and window frames of the CH: 3,791 l oil or 37,950 kWh
-Replacement of old glazing and window frames of the CC: 2,405 l oil or 24,076 kWh
-Replacement of luminaries in CH: 38.458 kWh/year
-Installation of green roof in CH: 5,302 l oil or 53,075 kWh. The coefficient of thermal permeability of the un-insulated roof before planting is estimated at 3.2 W/m2K and after planting at 1.2 W/m2K
-Replacement of old glazing and window frames of the CH: 3,791 l oil or 37,950 kWh
-Replacement of old glazing and window frames of the CC: 2,405 l oil or 24,076 kWh
Potential for learning or transfer
• Improved energy-efficiency education as the building of the City Hall is open to visitors and to interested schools (Visit from a school of Spain)
• Increase in the percentage of greenery of the City of Edessa
• Improvement of knowledge about the behavior of endemic plants on roofs and properties of the climatic conditions of Edessa
• Increased sense of pride of employees and executives due to the fact that they work in a building with nice green roof (not many public buildings in Greece have planted roof terraces)
• Increase in the percentage of greenery of the City of Edessa
• Improvement of knowledge about the behavior of endemic plants on roofs and properties of the climatic conditions of Edessa
• Increased sense of pride of employees and executives due to the fact that they work in a building with nice green roof (not many public buildings in Greece have planted roof terraces)
Good practice owner
You can contact the good practice owner below for more detailed information.
Organisation
Municipality of Edessa
Greece
Kentriki Makedonia
Contact
PostDoc Researcher