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Title: Evaluation of all-day-efficiency for selected flat plate and evacuated tube collectors

An evaluation of all day efficiency for selected flat plate and evacuated tube collectors is presented. Computations are based on a modified version of the NBSIR 78-1305A procedure for all day efficiency. The ASHMET and NOAA data bases for solar insolation are discussed. Details of the algorithm used to convert total (global) horizontal radiation to the collector tilt plane of the selected sites are given along with tables and graphs which show the results of the tests performed during this evaluation.
Publication Date:
OSTI Identifier:
5350270
Report Number(s):
NASA-CR-161866
Resource Type:
Technical Report
Research Org:
Wyle Labs., Huntsville, AL (USA)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; EVACUATED TUBE COLLECTORS; EFFICIENCY; PERFORMANCE TESTING; FLAT PLATE COLLECTORS; ALGORITHMS; INCLINATION; INSOLATION; EQUIPMENT; EVACUATED COLLECTORS; MATHEMATICAL LOGIC; SOLAR COLLECTORS; SOLAR EQUIPMENT; TESTING 141000* -- Solar Collectors & Concentrators