Comparison between open and closed solar thermal systems

An equation has been derived to determine the difference in the output hot water temperatures of open and closed solar systems. This temperature difference is mainly made up of two factors, the collector parameter and a heat exchanger parameter. Means of minimising this temperature penalty are discu...

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Bibliographic Details
Published inApplied energy Vol. 18; no. 2; pp. 83 - 88
Main Author Ibrahim, Said M.A
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1984
Elsevier Science
Elsevier
SeriesApplied Energy
Subjects
Applied sciences
Energy
Exact sciences and technology
Natural energy
Solar energy
Open circuit
Temperature difference
Installation
Mathematical analysis
Use
Egypt
Solar energy
Equation
Closed circuit
Hot water
Comparative study
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Summary:An equation has been derived to determine the difference in the output hot water temperatures of open and closed solar systems. This temperature difference is mainly made up of two factors, the collector parameter and a heat exchanger parameter. Means of minimising this temperature penalty are discussed and analysed. The present results are important in the design of solar thermal systems when heat exchangers are used.
ISSN:0306-2619
1872-9118
DOI:10.1016/0306-2619(84)90046-1