Objetivo To construct a total energy system for a low energy building project consisting of 92 houses, using a new type of roof integrated flat plate solar collectors for DHW and 1025 m2 stand-mounted solar collectors together with a 3,000 m3 seasonal storage. Total annual energy savings of 1,000.00 kWh are estimated, equal to a 80% saving of normal gas consumption. This is 175 kWh per m2 of houisng area for a normal building project, but only 35 kWh per m2 housing area here.The heating system within the houses will allow for low temperature operation District heating will be made as a low temperature (60/40 deg. C) system. This will only be used for heat distribution to the houses from September to May. From May to September, decentralised solar domestic hot water systems with a simple, room heating possibility, will be used.An electric heater is placed at the top of the solar storage tank, as a supplement during the summer, when the distric heating system will be stopped.The roof integrated collector has an effective collector area of 4 m2/house. Another 10.5 m2 solar collector area/house is located close to the seasonal storage and the district heating plant.Other system components are :- solar collectors (stand mounted): 1025 m2 of selective solar collectors with Teflon foil; flow is 0.31/m2/min.- seasonal storage: 3,000 m3 insulated seasonal underground storage, close to the heating central, and with 20-50 cm of insulation; heated from 10 deg. C to 80 deg. C.- local solar systems: 10-12 houses use a 2,500 litre storage tank; and 45 m2 solar collectors connected with the storage in "low flow operation"; Distribution to the DHW systems, and heating system in each house; a 15 kW supplementary electric heater in the 2,500 l storage tank.- low temperature heating system: floor, air and radiators.- ventilation system: estimated house ventilation rate is 0.11/h to which can be added 0.45/h to meet the BR - 82 demand. Heat recovery of 60% of this is expected. One system for 6 houses use only 200 W electricity.- district heating system: 60/40 deg.C preinsulated district heating piping is used. Is closed during summer month.- heating plant boiler: this is gas fueled, with an estimated annual efficiency of 85%: 2x150 kW boilers are used.- design concepts for 92 solar low energy houses: the houses are designed with an annual energy demand which is +/- 70% of the 1982 Danish Building Regulation, in which the following concepts are used:- improved insulation- heat recovery on ventilation air- airtight house construction- extra glazing in windows, low heat loss factor- night set-back- south facing orientation- mass added- attached sunspaces with pebble bed storage in the floorNormal heat demand is 1,250,000 kWh, and this will be met by 375,000 kWh passive/low energy solutions; 480,000 kWh active solar system; 130,000 kWh by reduced district heating losses/low temperature operation (60/40), closed during summer; DHW electricity 15,000 kWh and 250,000 kWh (gas boiler).The 3,000 m3 insulated seasonal storage is charged during summer by the near-by, stand-mounted solar collectors. Programa(s) ENG-ENALT 2C - Programme (EEC) of demonstration projects relating to the exploitation of alternative energy sources and to energy saving and the substitution of hydrocarbons, 1983-1985 Tema(s) 6.2 - THERMAL Convocatoria de propuestas Data not available Régimen de financiación DEM - Demonstration contracts Coordinador KOEBENHAVNS ALMINDELIGE BOLIGSELSKAB (KAB) Aportación de la UE Sin datos Dirección VESTER VOLDGADE 17 1459 Koebenhavin Dinamarca Ver en el mapa Coste total Sin datos
