Browse > Article
http://dx.doi.org/10.6110/KJACR.2013.25.9.499

Performance Simulation of a R744 Refrigeration System in a Refrigerator Truck under a Frost Condition  

Kim, Sang Hun (Graduate School of Mechanical Engineering, Chosun University)
Myoung, Chi Wook (Graduate School of Mechanical Engineering, Chosun University)
Cho, Hong Hyun (Department Mechanical Engineering, Chosun University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.25, no.9, 2013 , pp. 499-505 More about this Journal
Abstract
R744 has been appropriated for substitute refrigerant, because of its high stability, and environment-friendly nature as a natural refrigerant. To analyze the cooling performance of a refrigeration system in a refrigerator truck using R744 according to the blocking ratio, an analytical model of the refrigeration system was developed under frost conditions, using EES. The performance of the refrigeration system was predicted with the indoor and outdoor air temperature, outdoor air velocity, and compressor speed. As a result, the system performance decreased, with the increase of frost growth. When the blocking ratio was 40.4% in the basic condition, the refrigeration capacity was decreased by 27.1%, compared to the non-frost condition.
Keywords
R744; COP; Blocking ratio; Frost; Fin-tube;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Yang, D. K., Lee, K. S., and Song, S., 2006, Modeling for predicting frosting behavior of a fin tube heat exchanger, International Journal of Heat and Mass Transfer, Vol. 49, pp. 1472-1479.   DOI   ScienceOn
2 Getu, H. M. and Bansal, P. K., 2011, New frost property correlations for a flat finned tube heat exchanger, International Journal of Thermal Sciences, Vol. 50, pp. 544-557.   DOI   ScienceOn
3 Moon, J. C., 2010, Development of high efficient refrigerated vehicle using thermal storage, SAREK, Vol. 39, No. 12, pp. 36-42.   과학기술학회마을
4 ISO 15502, 2005, Household refrigerating appliances characteristics and test methods, International Organization for Standardization, Geneva, Switzerland.
5 EES : Engineering Equation Solver, 2006, F-Chart Software Inc.
6 Yoon, S. H., Cho, E. S., Hwang, Y. W., Kim, M. S., Min, K. D., and Kim, Y. C., 2004, Characteristics of evaporative heat transfer and pressure drop of carbon dioxide and correlation development, International Journal of Refrigeration, Vol. 27, pp. 111-119.   DOI   ScienceOn
7 Wang, C. C., Lee, W. S., and Sheu, W. J., 2001, A comparative study of compact enhanced fin and tube heat exchangers, International Journal of Heat and Mass Transfer, Vol. 44, pp. 3565-3573.   DOI   ScienceOn
8 Aoki, K., Hattori, M., and Akita, K., 1990, A study of extended surface heat exchanger with frosting; 2nd Report, Heat Transfer and Pressure Drop for Each Row, JSME, Vol. 97, pp. 793-802.
9 Sanders, C. T., 1974, The influence of frost formation and defrosting on the performance of air coolers, Ph.D. thesis, Technische Hoge-school, Delft, Netherlands.
10 Hwang, Y. W. and Kim, O. J, 2007, Experimental study on the CO2 flow through electronic expansion valves, Proceedings of the SAREK'07 Summer Annual Conference, pp. 1237-1241.
11 Hayashi, Y., Aoki, A., Adachi, S., and Hori, K., 1977, Study of frost properties correlating with frost formation types, ASME J. Heat Transfer, Vol. 99, pp. 239-245.   DOI
12 Sanchez, D., Torrella, E., Cabello, R., and Liopis, R., 2010, Influence of the superheat associated to a semihermetic compressor of a transcritical $CO_{2}$ refrigeration plant, Applied Thermal Engineering, Vol. 30, pp. 302-309.   DOI   ScienceOn