Actions for Performance of a drain-back solar heating and hot water system with auxiliary heat pump. Final report

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Performance of a drain-back solar heating and hot water system with auxiliary heat pump. Final report

Author
Karaki, S.
Published
United States : [publisher not identified], 1984
Springfield, Va.: National Technical Information Service, [approximately 1984]
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
The principal objective of the project was to test and evaluate the BNL collectors in a space heating system. When the BNL collectors delaminated under stagnation conditions, they were replaced with the Chamberlain collectors which were previously used on solar house III, and tests were continued to evaluate performance of a drain-back system. Results leading to the following conclusions are discussed. (1) The Chamberlain collectors have deteriorated in performance compared to previous seasons. Where daily efficiency of 41% were attained in 1978 to 1979 and 1979 to 1980, efficiency was 37%. System efficiency of 29% compares to 30% in prior years. (2) Solar contribution to DHW heating is low, and is probably the result of the artificially imposed load profile and the low recovery rate of the double-wall heat exchanger. (3) System efficiency can be improved by reducing thermal losses from storage.
Report Numbers
DE84010824; DOE/CS/30569-33
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC03-81CS30569
OSTI Identifier 6927527
Research organization: Colorado State Univ., Fort Collins (USA). Solar Energy Applications Lab.
View MARC record | catkey: 47340748