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Heat Transfer Characteristics During Slush Formation in the Evaporator of a Small Slush Maker  

Choi, Yong-Min (Graduate School, University of Incheon)
Kim, Do-Young (Graduate School, University of Incheon)
Kim, Nae-Hyun (Department of Mechanical Engineering, University of Incheon)
Lee, Eul-Jong (Graduate School, University of Incheon)
Kim, Soo-Hwan (Graduate School, University of Incheon)
Byun, Ho-Won (Graduate School, University of Incheon)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.21, no.11, 2009 , pp. 643-648 More about this Journal
Abstract
Tests were conducted to obtain heat transfer coefficients during slush formation from 10% sucrose solution. The slush was made by scraping the ice formed on the cylinder. Cold brine was supplied inside of the evaporator cylinder to cool the outer surface. Below a certain brine temperature, which was $-5^{\circ}C$ in this study, the solution was supercooled, and suddenly turned into ice crystals. During slush formation, the heat transfer coefficient oscillated significantly, due to periodic removal of ice chunk form the surface. The average heat transfer coefficient during slush formation was 40~70% higher than that obtained during single phase cooling. The heat transfer coefficient was also affected by the brine temperature with increasing heat transfer coefficient at higher brine temperature.
Keywords
Slush; Heat transfer characterstic; Subcooling;
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  • Reference
1 Se-A E&C, Slush Machine Model SSM180, www.icemaker.co.kr
2 Ehylene Glycol Product Guide, www.meglobal.biz
3 Handbook of Heat Transfer, 1973, edited by W. M. Rohsenow and J. P. Harnett, Chapter 7, pp. 150-151
4 Shah, R. K. and London, A. L., 1978, Laminar flow forced convection in ducts, Advances in Heat Transfer, Eds., T. F. Irvine and J. P. Hartnett, Supplement 1, Academic Press
5 Lakhdar, M. B., Cerecero, R., Alvarez, G., Guilpart, J., Flick, D. and Lallemand, A., 2005, Heat transfer with freezing in a scraped surface heat exchanger, Applied Thermal Engineering, Vol. 25, pp. 45-60   DOI   ScienceOn
6 Qun, F., Chen, X. D., Ramachandra, S. and Free, K., 2006, Heat transfer and power consumption in a scraped surface heat exchanger while freezing aqueous solution, Separation and Purification Technology, Vol. 48, pp. 150-158   DOI   ScienceOn
7 Kline, S. J. and McClintock, F. A., 1953, The description of uncertainties in single sample experiments, Mechanical Engineering, Vol. 75, pp. 3-9