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Energies 2012, 5(9), 3479-3491; doi:10.3390/en5093479

Experimental Study on Frost Height of Round Plate Fin-Tube Heat Exchangers for Mobile Heat Pumps

1 Department of Mechanical Engineering, Dong-A University, 37 Nakdong-Daero 550 beon-gil saha-gu, Busan, Korea 2 Department of Mechanical Engineering, Korea University, Anam-Dong, Sungbuk-Ku, Seoul 136-713, Korea 3 School of Mechanical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 712-749, Korea
* Author to whom correspondence should be addressed.
Received: 23 May 2012 / Revised: 4 June 2012 / Accepted: 9 July 2012 / Published: 10 September 2012
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The objective of this study was to provide experimental data that could be used to predict frost growth and frost performance of a round plate fin-tube heat exchanger for low temperature heat pumps used in zero emission vehicles under cold weather conditions. In this study, round plate fin-tube heat exchangers were tested with variation of the fin space, air flow rate, relative humidity, and inlet air temperature. Frost height was measured and considered with the boundary layer interruption between fins. Frost height for 8.0 mm of fin space was increased by approximately 91.9% with an increase of relative humidity from 50.0% to 80.0%. The growth rate of frost height at 1.2 m3/min was observed to be 13.0% greater than that at 0.8 m3/min. Finally, the variation of the blockage ratio with fin space would be an important reference for designing advanced heat exchangers that operate under cold weather conditions.
Keywords: frost; heat exchanger; heat pump; height; round plate fin frost; heat exchanger; heat pump; height; round plate fin
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lee, M.-Y.; Kim, Y.; Lee, D.-Y. Experimental Study on Frost Height of Round Plate Fin-Tube Heat Exchangers for Mobile Heat Pumps. Energies 2012, 5, 3479-3491.

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