Evacuated tube collectors are not flat plates

Conference · Tue Jan 01 04:00:00 EST 1980 · Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States)

OSTI ID:6547930

Schultz, W E ^[1]; Banks, M E; Wiesenmaier, B

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1. Wyle Labs., Huntsville, AL

Explicit test results are provided which hopefully will lead to additional test procedures to make ASHRAE 93-77 and NBSIR 1305A acceptable for testing evacuated tube collectors and to promote a standard procedure for utilizing ASHRAE 93-77 test results to assist solar system designers in making proper application of the data. The appropriate choice of collectors and collector array size is generally based on the thermal performance of collectors which have been tested to the current baseline testing standard, ASHRAE 93-77. Unfortunately, the standard does not specify proper utilization of the test results, and quite often the incident angle modifier is ignored in sizing collector array arrangements, resulting in undersized arrays for flat plates and possible oversized arrays with evacuated tubes.

• OSTI ID: 6547930
• Report Number(s): CONF-800604-P2
• Conference Information: Journal Name: Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States) Journal Volume: 3.1
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
EFFICIENCY
EQUIPMENT
EVACUATED COLLECTORS
EVACUATED TUBE COLLECTORS
INCIDENCE ANGLE
PERFORMANCE TESTING
SIZE
SOLAR COLLECTORS
SOLAR EQUIPMENT
STANDARDS
TESTING
THERMAL EFFICIENCY