P and a al Store lPaosrtts1mO oyuetahrsCaitny Council in the UK has been upgrading its housing stock over the d has installed over 6000 new heating systems. Most of these have used individual gas-fired combination boilers, but when the council came to tshuestCaihnaarbleles sDoiclukteionns. housing estate, an opportunity arose to deliver a more The estaıe , named after the famous author, who was born nearby, consists of 515 dwellings in eight medium- and high-rise blocks. An existing district heating system supplied two blocks with 176 dwellings; other blocks had a mix of gas fires, electric fan heaters and underfloor off-peak electric heating. Local schools for small children and pre-teenage children were close by and a new arts and sports centre was also being planned in the area. Rather than remove the old district heating system it was decided to investigate upgrading and expanding it to a modern system supplied by CHP. PB Power, part of !he Parsons Brinckerhoff consultancy, carried out the inve stigation. Their study was financed with a grant from the Government-funded a C n ommunity Energy Programme (CEP), administered jointly by the Carbon Trust d the Energy Savings Trust. The study concluded !hat a viable scheme could be developed to supply both the housing, the schools and !he new arts and leisure building by redeveloping the existing boiler house as a new energy centre, including a gas-fired CHP unit and a thermal store. There was potential in the future to connect further blocks to the Odinstcreictthheeastcinogpesoysf ttehme .project was defined and the economic case proven, the scheme was submitted to the CEP and was successful in obtaining a capital grant of US$766,000, about 12% of the total cost. This enabled the project to proceed into the delailed design and construction phase. Heat Exchangers for hydraulic separation One of the tirsi issues to resolve was the hydraulic design of the system. The tower blocks of housing, some up to 18 storeys high, created high pressure on the healing circuit. There was concern that any leak or damage to the radiator circuits in the flats could lead to virtually unlimited flooding. So !he decision was made to hydraulically separate the radiator circuit in each flat from the main p lo rimary circuit. The radiator circuit could !hen be installed using conventional w-pressure radiators very similar to the approach used for individual heating systems. The hydraulic separation was achieved by using a prefabricated �=====-- ♦"AB'ye Giriş Sürecinde Türkiye'de Kojenerasyon-Yeni Gelişmeler"
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