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Effect of Local Frost Characteristics on Thermal Performance of Fin Tube Heat Exchanger Under Frosting Condition

[+] Author Affiliations
Jeongkeun Kim, Jieun Hwang, Keumnam Cho

Sungkyunkwan University, Suwon, Korea

Paper No. HT2013-17750, pp. V004T12A005; 6 pages
doi:10.1115/HT2013-17750
From:
  • ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology
  • Volume 4: Heat and Mass Transfer Under Extreme Conditions; Environmental Heat Transfer; Computational Heat Transfer; Visualization of Heat Transfer; Heat Transfer Education and Future Directions in Heat Transfer; Nuclear Energy
  • Minneapolis, Minnesota, USA, July 14–19, 2013
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-5550-8
  • Copyright © 2013 by ASME

abstract

The present study aimed to measure and predict frost characteristics and heat transfer rate of fin-tube specimen, and predicted them of fin-tube heat exchanger. Test conditions were air temperature from 0.5 to 7 °C, absolute humidity from 3.18 to 4.01 g/kgDA, air velocity from 0.5 to 2.5m/s, and coolant temperature from −15 to −5 °C. The coolant was ethylene-glycol aqueous solution with concentration of 50%. Correlation equations for the average frost thickness and frost surface temperature were proposed. The proposed correlation equation for the average frost thickness and average frost surface temperature agreed with the measured data within the maximum deviation of 20% and 15%. The average frost thickness in front and front mass were predicted and compared with the measured data. They agreed within ±14 and ±23%, respectively. The heat transfer rate was predicted and compared with the measured data. They agreed within ±13% when the total heat transfer rate was over 70W.

Copyright © 2013 by ASME
Topics: Heat exchangers

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