Objetivo AN AREA WHERE HEAT STORAGE MAY BE ATTRACTIVE, IS DAILY HEAT STORAGE AT 80 DEGREES C IN COMBINATION WITH AN ELECTRICAL HEAT PUMP, IN COUNTRIES WHERE THE ELECTRICITY COST IS LOW DURING NIGHT. IN ADDITION SUCH A STORAGE SYSTEM WOULD ALLOW THE HEAT PUMP TO RUN CONTINUOUSLY, THUS AVOIDING ON/OFF LOSSES WHICH OCCUR DURING NORMAL OPERATION WITH A THERMOSTAT. THESE ON/OFF LOSSES CAN BE AS HIGH AS 10-15 %. IN THIS PROJECT A STORAGE SYSTEM WITH PARAFFIN HAS BEEN STUDIED. A SYSTEM CONSISTING OF A 0.9 M3 CONTAINER WITH PARAFFIN IN WHICH A HEAT EXCHANGER WAS EMERGED, WAS FOUND TO OPERATE SATISFACTORY. TESTS IN COMBINATION WITH AN ELECTRICAL HEAT PUMP FOR DIFFERENT WEATHER CONDITIONS (CLIMATIC CHAMBER) WERE CARRIED OUT AND THE ECONOMY OF SUCH A SYSTEM WAS CALCULATED. THE INVESTMENT COST FOR SUCH A STORAGE SYSTEM (ASSUMING LARGE SCALE PRODUCTION) IS AROUND 12,000 FF. WITH ELECTRICITY PRICES OF 0.38 FF/KWH (DAY) AND 0.22 FF/KWH (NIGHT), HEAT STORAGE WITH AN ELECTRICAL HEAT PUMP WAS ECONOMICALLY NOT ATTRACTIVE (PAYBACK TIME : 20 YEARS). IN OTHER COUNTRIES WITH HIGHER ELECTRICITY PRICES THE SYSTEM MAY BECOME INTERESTING IN PARTICULAR AS IT SEEMS TO BE POSSIBLE TO DECREASE THE INVESTMENT COST. THE PROBLEM OF DETERIORATION OF PARAFFIN, WHICH HAS BEEN REPORTED ELSEWHERE, WAS NOT NOTICED. THIS WAS POSSIBLY DUE TO THE LIMITED NUMBER OF CYCLES. Programa(s) PRE-ENNONUC 2C - Energy research and development programme (EEC), 1979-1983 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador Compagnie Générale d'Electricité (CGE) Aportación de la UE Sin datos Dirección Route de Nozay 91460 Marcoussis Francia Ver en el mapa Coste total Sin datos
