Report
Double-exposure collector system. Technical progress report, October 1-December 31, 1978
30 Jan 1979
Abstract
A retrofit solar water-heating system has been installed in a three-story apartment building at Drexel University. The system employs two conventional collector banks (10 PPG collectors) mounted at the latitude angle for Philadelphia of 40 deg from the horizontal and two double-exposure collector (DEC's) mounted vertically in mirrored enclosures. Although the DEC units are being used for year-round domestic water-heating for the building, they are designed to provide maximum output in the winter and are therefore well-suited to solar space heating applications. Instrumentation for testing the collectors has been available in the apartment building. The system was operated on two nights to determine collector total loss coefficients and heat capacities. Loss coefficients of 5.0 and 7.2 W/m/sup 2/C and heat capacities of 14,400 and 10,800 J/m/sup 2/C were obtained for the PPG and DEC collectors respectively. A theoretical study of optimal mirror placements for conventional collectors was also completed during the quarter. This study is important because many systems presently operating employ non-optimal mirror-panel configurations and the results of the study could be used to significantly improve the performance of these systems.
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Details
- Title
- Double-exposure collector system. Technical progress report, October 1-December 31, 1978
- Creators
- D. C LarsonC. W Savery
- Publisher
- Drexel University
- Resource Type
- Report
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991021877479604721