An installation consisting of an electric heat pump coupled to an underground thermal storage system and a combined heat and power unit has made spectacular energy savings possible for a secondary school complex. The storage system is recharged by 306 m2 of selective, unglazed solar collector. Financial balance would be attained if the fuel (natural gas) were to cost 46 cents per KWh, which is slightly higher than current prices. This article describes the system and evaluates the technical and financial results after 2 years of operation.
IEA Heat Pump Centre Newsletter
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