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太阳能玻璃真空集热管热性能评价方法

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Indexed by:期刊论文

Date of Publication:2011-06-05

Journal:建筑热能通风空调

Volume:30

Issue:3

Page Number:22-26

ISSN No.:1003-0344

Key Words:玻璃真空管;热性能;评价

Abstract:为准确地评价玻璃真空管内的传热性能,减小其它未知参数的影响,本文提出了单根真空集热管的热性能评价方法.首先分析了集热管效率与集热器效率的差别;其次从传热效率和(火用)效率的角度对U型管式真空管进行了热性能分析;最后通过试验研究了单根玻璃真空管与集热器的热性能.结果表明:采用单根玻璃真空管进行热性能评价能更好地反映真空管的传热性能,与采用相同集热管的集热器相比,其集热效率提高了8%.

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