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

Energies

Moo-Yeon Lee¹  Yongchan Kim² 

[1]Department of Mechanical Engineering, Dong-A University, 37 Nakdong-Daero 550 beon-gil saha-gu, Busan, Korea

[2] E-Mail:

[3]Department of Mechanical Engineering, Korea University, Anam-Dong, Sungbuk-Ku, Seoul 136-713, Korea

[4] E-Mail:

关键词: frost;    heat exchanger;    heat pump;    height;    round plate fin;   

DOI  :  10.3390/en5093479

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.