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Conference papers
Performance comparison of round tubes finned heat exchangers and macro micro-channel heat exchangers in a low capacity heat pump
Abstract : Micro-channel heat exchangers (MCHE) are used in automobile applications due to their low weight and high compactness. Those MCHE are just gaining interest in stationary application and they have a great potential for low heating capacity heat pumps to be installed in " passive houses " where the heating demand is 3 to 5 times lower than in the current new individual houses built in European countries. In this paper, a low capacity integrated air to air heat pump prototype is used to perform an experimental comparison of both a round finned tube and a MCHE used as an evaporator. The MCHE is a prototype one using flat fins. The comparison is based on a constant face surface criterion and an equivalent cooling capacity for different inlet temperature and air flow rate conditions. R-134a is the refrigerant used in the heat pump. First both evaporators' performances are compared experimentally and the results show a clear advantage for the MCHE. In a second step, the behavior of the MCHE evaporator is studied under frosting conditions. The frosting kinetics and the defrosting behavior are analyzed. The results show a behavior similar to round tube finned heat exchangers with frosting cycle higher than 45mn and a defrosting using ventilation exhaust air in less than 10mn.
Cited literature [23 references]
https://hal-mines-paristech.archives-ouvertes.fr/hal-01299946
Contributor : Joelle Andrianarijaona Connect in order to contact the contributor
Submitted on : Friday, April 8, 2016 - 3:24:23 PM
Last modification on : Wednesday, November 17, 2021 - 12:32:17 PM
Long-term archiving on: : Tuesday, November 15, 2016 - 12:09:31 AM
Contributor : Joelle Andrianarijaona Connect in order to contact the contributor
Submitted on : Friday, April 8, 2016 - 3:24:23 PM
Last modification on : Wednesday, November 17, 2021 - 12:32:17 PM
Long-term archiving on: : Tuesday, November 15, 2016 - 12:09:31 AM
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014.C.005.pdf
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