Browse > Article
http://dx.doi.org/10.6110/KJACR.2012.24.10.724

Analysis Study of Performance of CO2 Microchannel Evaporator According to Frost Growth  

Shin, Eun-Sung (Graduate School of Mechanical Engineering, Chosun University)
Cho, Hong-Hyun (Department of Mechanical Engineering, Chosun University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.24, no.10, 2012 , pp. 724-732 More about this Journal
Abstract
The microchannel evaporator with louver fin using carbon dioxide are analyzed according to the frost growth. To predict the performance of microchannel evaporator with the frost growth under low temperature, the simulation condition of previous studies was applied. As a result, the frost thickness increases and its increasing rate is reduced when the operating time increases. Frost thickness increases gradually below the quality of 0.74, and then it decreases rapidly. In addition, the frost growth of present model under same surface temperature is very similar trends with Moallem's test results. In case of low temperature application, the dimensionless frost thickness increases dramatically and it is about 0.86 after 10 minutes.
Keywords
Frost; Evaporator; Heat transfer; Louver fin;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Lee, K. S., Kim, W. S., and Lee, T. H., 1997, A one-dimensional model for frost formation on a cold flat surface, International Journal of Heat Mass Transfer, Vol. 40, No. 18, pp. 4359- 4365.   DOI   ScienceOn
2 Xia, Y., Zhong, Y., Hrnjak, P. S., and Jacobi, A. M., 2006, Frost, defrost, and refrost and its impact on the air-side thermal-hydraulic performance of louvered-fin, flat-tube heat exchanger, International Journal of Refrigeration, Vol. 29, pp. 1066-1079.   DOI   ScienceOn
3 Hermes, C. J. L., Piucco, R. O., Barbosa Jr, J. R., and Melo C., 2009, A study of frost growth and densification on flat surfaces, Experimental Thermal and Fluid Science, Vol. 33, pp. 371-379   DOI
4 Xia, Y. and Jacobi, A. M., 2010, A model for predicting the thermal-hydraulic performance of louver-fin, flat-tube heat exchangers under frosting conditions, International Journal of Refrigeration, Vol. 33, pp. 321-333.   DOI
5 Hayashi, Y., Aoki, A., and Adachi, S., 1977, Study of frost properties correlating with frost formation types, Journal of Heat Transfer, Vol. 99, pp. 239-245.   DOI
6 Cheng, L., Ribatski, G., Wojtan, L., and Thome, J. R., 2006, New flow boiling heat transfer model and flow pattern map for carbon dioxide evaporating inside horizontal tubes, International Journal of Heat and Mass Transfer, Vol. 49, pp. 4082-4094.   DOI
7 Cheng, L., Ribatski, G., and Thome, J. R., 2008, New prediction methods for $CO_{2}$ evaporation inside tubes：Part II-An updated general flow boiling heat transfer model based on flow patterns, International Journal of Heat and Mass Transfer, Vol. 51, pp. 125-135.   DOI
8 Cheng, L., Ribatski, G., Quiben, J. M., and Thome, J. R., 2008, New prediction methods for $CO_{2}$ evaporation inside tubes：Part I-A two-stage flow pattern map and a flow pattern based phenomenological model for twophase flow frictional pressure drops, International Journal of Heat and Mass Transfer, Vol. 51, pp. 111-124.   DOI
9 Moallem, E., Padhmanabhan, S., Cremaschi, L., and Fisher, D. E., 2012, Experimental investigation of the surface temperature and water retention effects on the frosting performance of a compact microchannel heat exchanger for heat pump systems, International Journal of Refrigeration, Vol. 35, pp. 171-186.   DOI
10 Domanski, P. A., 1989, EVSIM-An evaporator simulation monel accounting for refrigerant and one dimensional air, NISTIR-89-4133, NIST, Washington, DC.
11 Mahlia, T. M. I. and Saidur, R., 2010, A review on test procedure, energy efficiency standards and energy labels for room air conditioners and refrigerator-freezers, Renewable and Sustainable Energy Reviews, Vol. 14, pp. 1888-1900.   DOI