HEATING OF A LABORATORY HALL BY MEANS OF A SOIL HEAT PUMP COMBINED WITH UNSHIELDED SOLAR ABSORBERS
A laboratory hall was heated by three heat pumps each of them using a horizontal ground heat exchanger as the only heat source during a first heating season. The installation performances were in good accordance with the results predicted by a simulation programme. Two of the existing soil heat exchangers were combined with energy absorbers during the two next heating seasons. No clear improvement of the yearly global COP followed from such a combination. A short start-stop cycle time reduces the H.P. COP, the insertion of buffer tanks did not improve the yearly global COP. The stand-by consumption of the H.P. when the compressor is turned off is not negligible when the H.P. is running only a few hours a week. The matching between H.P. without power control and energy absorbers is unfavourable because the H.P. are dimensioned for covering the nominal heat losses. Assistance of the soil heat exchanger by energy absorbers does not seem to be attractive but can bring a solution when the available soil surface is too small. A promising alternative for energy absorbers is their use as the only heat source of a bivalent H.P. system but cost reduction is a must.
Bibliographic Reference: EUR 9117 EN (1984) MF, 28 P., BFR 120, BLOW-UP COPY BFR 150, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989122090300 / Last updated on: 1987-01-01
Available languages: en