Collector efficiency factor F'for absorbers with rectangular fluid ducts contacting the entire surface (Record no. 48493)

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fixed length control field 01689nam a2200181Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field MX-MdCICY
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control field 20250625153939.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-14299
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250602s9999 xx |||||s2 |||| ||und|d
245 10 - TITLE STATEMENT
Title Collector efficiency factor F'for absorbers with rectangular fluid ducts contacting the entire surface
490 0# - SERIES STATEMENT
Volume/sequential designation Solar Energy, 60, p.199-207, 1997
520 3# - SUMMARY, ETC.
Summary, etc. most commonly used absorbers in flat-plate collectors are manufactured as finned tubes. In this article, an alternative design is investigated: the absorber consists of a rectangular, narrow duct, in which the fluid contacts the entire surface. Under the conditions of fully developed laminar flow and negligible heat resistance of the absorber plate material, relations are developed to calculate the temperature distribution within the fluid. These results are used to derive a formula for the collector efficiency factor F' of narrow-duct absorbers, which is then evaluated for water and a commonly used glycol antifreeze liquid as the collector fluid. Finally, the optimisation of narrow-duct absorbers is investigated with consideration of the thermal heat gained by the collector and primary energy consumed by the pump of the solar system due to the pressure drop in the absorber. It is concluded that duct heights in the range of 3-6 mm should be chosen. Collector efficiency factors F' around 0.98 may be expected. 0 1997 Elsevier Science Ltd.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Rommel, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Moock, W.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1Wpq1fguBc7xWwxonKU9VWvABiXqarLjK/view?usp=drivesdk">https://drive.google.com/file/d/1Wpq1fguBc7xWwxonKU9VWvABiXqarLjK/view?usp=drivesdk</a>
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