Air-side heat transfer and pressure drop characteristics of flat-type, U-and V-shaped microchannel condensers for refrigerator applications
International Journal of Heat and Mass Transfer, ISSN: 0017-9310, Vol: 176, Page: 121460
2021
- 13Citations
- 12Captures
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Article Description
In this study, the air-side heat transfer characteristics of microchannel heat exchangers (MCHXs), with enhanced shapes as condensers in refrigerators, are investigated. The heat transfer performances of flat-type, U- and V-shaped MCHXs, and conventional spiral fin-tube heat exchangers were measured and compared at various air flow rates and inlet temperatures. Furthermore, the Colburn j -factor and friction factor of the MCHXs were analyzed as a function of the Reynolds number. The second-type volume and area goodness factors were also analyzed to compare the heat transfer performances of the MCHXs considering various design parameters. Additionally, the empirical correlations of the Colburn j -factor and friction factor for U- and V-shaped MCHXs were developed using dimensionless parameters that reflect geometric and operating conditions. Hence, a U-shaped MCHX with a longer tube length was recommended to obtain a high absolute heat transfer rate, while a flat-type MCHX was recommended to realize high compactness and heat transfer efficiency.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0017931021005639; http://dx.doi.org/10.1016/j.ijheatmasstransfer.2021.121460; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85106366772&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0017931021005639; https://dx.doi.org/10.1016/j.ijheatmasstransfer.2021.121460
Elsevier BV
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