Actions for TECH House I horizontal coil ground coupled heat pump : 1983 cooling season performance

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TECH House I horizontal coil ground coupled heat pump : 1983 cooling season performance

Author
Johnson, S.
Published
United States : [publisher not identified], 1984
Springfield, Va.: National Technical Information Service, [approximately 1984]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Baugh, R. N., Conlin, F., McGraw, B. A., and Wix, S.

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Summary
Performance of the ground-coupled heat pump system in TECH House I at the Tennessee Energy Conservation in Housing Facility is reported for the summer of 1983. The overall seasonal performance factor (SPF) was 1.11 with the system located within the conditioned space. If the system had been outside the conditioned space, an SPF of 1.31 would have been realized. This low performance level, below that of a conventional air-to-air heat pump, is primarily due to poor performance of the ground heat exchanger. Degraded soil heat transfer characteristics due to drying and the occurrence of voids around the pipe in the trench backfill were primary reasons for poor performance. In addition, it appears that the underground coil length needs to be increased in order to match the peak cooling loads of the house. The sensible load on the house was met by the system only for ambient temperature below 98/sup 0/F. The latent load was often not met because the inside coil temperature was not sufficiently below the dew point temperature of the inside air.
Report Numbers
DE84012042; ORNL/Sub-81-7685/2and92
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC05-84OR21400
OSTI Identifier 6924794
Research organization: Tennessee Univ., Knoxville (USA). Energy, Environment and Resources Center.
View MARC record | catkey: 47341424