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The application of solar collectors for space heating and preheating of domestic hot water is investigated in a group of houses connected to a central seasonal heat store. Surplus energy collected during the summer is stored in the upper layer of soil until needed for heating in the winter. Because of heat loss by conduction to the surrounding soil, it is essential to have a large heat store and a considerable number of houses connnected to it. The system used Philips evacuated tube collectors, of total area 2358 m2. In the second year solar energy supplied by the system amounted to 49% of total demand, or 584 MWh. The total electricity consumption of the system was 112 MWh, making it economically unfeasible at current energy prices. Much useful practical experience was gained which will lead to considerable simplification and cost reduction in future projects.

Additional information

Authors: PAUL A, Bredero Energy Systems, Bunnink (NL)
Bibliographic Reference: EUR 12158 EN/NL (1989) FS, 100 pp., ECU 8.75
Availability: (2)
ISBN: ISBN 92-825-9796-2;CD-NA-
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