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http://dx.doi.org/10.5307/JBE.2007.32.2.102

Drying and Low Temperature Storage System of Agricultural Products using the Air to Air Heat Pump (II) - Performance of Low Temperature Storage for Apples -  

Kang, Y.K. (National Institute of Agricultural Engineering (NIAE))
Han, C.S. (Dept. of Bio System Engineering, Chungbuk National University)
Keum, D.H. (Dept. of Bio-Mechatronic Engineering, SungKyunKwan University)
Publication Information
Journal of Biosystems Engineering / v.32, no.2, 2007 , pp. 102-108 More about this Journal
Abstract
Heat pump systems are recognized to be heating and cooing systems. In this study, to check the practical application possibility of heat pump systems as low temperature storage systems and get basic data, apples of a long term storage items were stored and performance of low temperature storage and quality changes of apples were evaluated. Cooling coefficient of performance of the system was from 1.1 to 1.3. Although ambient air temperature varied widely from $-13^{\circ}C$ to $29.6^{\circ}C$ during low temperature storage period from January to June, the average temperature of low temperature storage chamber was $1.1^{\circ}C$ at setting temperature of $1.5^{\circ}C$. Sucrose of apples stored by the heat pump decreased from initial sucrose of 15.4% (Brix number) to final sucrose of 14.3%. Weight loss ratio of apples was 9.7% and internal and external view of apples after low temperature storage were very satisfactory with the naked eye.
Keywords
Heat pump; Low temperature storage; COP; Apple; Heating and cooling;
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Times Cited By KSCI : 6  (Citation Analysis)
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