Solar buildings in GÃ¥rdsten - GÃ¥rdstensbostÃ¤der

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Result:Major savingsThe follow-up through to 2004 has shown that operatingcosts have been cut by reducing the buildings’heating, ventilation and hot water requirements by45%, from 5,000 to just over 2,700 MWh/year.The graph on the next page shows the resultsfrom the follow-up of heat supply, use of electricityand water use:· district heating requirements (corrected fortemperature variation) have been reduced fromjust over 270 to approximately 145 kWh/year/m 2· electricity use is reduced from approximately50 to 35 kWh/year/m 2· water use is reduced from 2.36 to 1.63cubic metres/year/m 2The collective metering of electricity, water andheating has been changed to individual metering, whichmeans that each tenant can influence the cost ofelectricity, water and heating, which has also contributedto reducing operating costs.EACH APARTMENT HAS JUST OVER SEK5,000 LOWER OPERATING COSTS PERYEARThe additional cost for the operating and energysavingmeasures that have been made amount toapproximately SEK 20 million, of which just under30% is covered by a contribution from the EU andthe Swedish Energy Agency.Since the tenants moved in savings have increasedeach year due to the tenants’ actions, as it has provedadvantageous to be thrifty. However, the cost of purchasingdistrict heating, electricity and water increasedduring the same period.In 2001, the saving was approximately SEK 1.0million and in 2004 approximately SEK 1.6 million.During the period 2001–2004 the total saving wasapproximately SEK 5.3 million, which is just over SEK5,000 per apartment per year.MEASUREMENT OF HEATING, WATERAND ELECTRICITYSpace heating, or rather the thermal comfort, ismetered by means of room temperature measuredin the living room and bedroom. The temperature
measurements are transmitted from this sensor to amemory in the stairwell. The information from thismemory is then passed on to a receiving station,where all the measurements are processed.The finalresult shows how warm it is in the apartment andwhat the tenant will pay.The tenant decides on thetemperature in the apartment with the aid of thermostatson the radiators. The basic rent is basedon a temperature of 21 degrees. If the tenant wantsit warmer it will cost extra and if the tenant wantsit cooler there will be a rebate.Similarly, the measurement of cold water and hotwater takes place using flow meters and an electricitymeter.All information is transmitted automatically to areceiving station for compilation.The rent is adjusteddepending on whether the tenant uses more or lessthan what is included in the basic rent.Radiator thermostatTemperature sensor5,000“Savings” Water cost Electricity cost District heating cost4,0003,0002,0001,0000Before 2001 2002 2003 2004
Page 1 and 2: SOLHUSEN IGÅRDSTENolar buildings i
Page 4 and 5: SolhusenRenewal andresidentialinflu
Page 6 and 7: From grey concreteBeforeThe first S
Page 8: …to open, bright “Solar buildin
Page 11: In addition, the buildings were giv
Page 16 and 17: WORKING GROUPS’ PROPOSALSThe work
Page 18 and 19: Awards forSolar buildingsThe projec
Page 20: SFacts aboutGårdstenNumber of resi

Solar buildings in GÃ¥rdsten - GÃ¥rdstensbostÃ¤der

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