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http://dx.doi.org/10.5762/KAIS.2016.17.8.728

Optimization of the Refrigerant Charge and the Expansion Valve Opening for the Soft Ice Cream Machine Using R-404A  

Kim, Nae-Hyun (Department of Mechanical Engineering, Incheon National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.8, 2016 , pp. 728-734 More about this Journal
Abstract
The improvements of living and lifestyle have led to the increased sales of frozen milk products, such as soft ice cream or slush. These frozen milk products are commonly made in small refrigeration machines. R-502, which has long been used as the refrigerant in soft ice cream machines, is being replaced with R-404A due to the ozone layer depletion issue. In this study, an optimization and performance evaluation were conducted on a soft ice cream machine with a freezer volume of 2.8 liters. The optimization focused on the appropriate refrigerant charge and expansion valve opening. Under the optimized conditions, ice cream was produced in 10 minutes and 5 seconds, and the COP was 0.57. The performance tests included ice cream sales with no interval, ice cream sales with 30 second intervals and under extreme outdoor conditions. The results showed that 20 sales were possible with no interval, and infinite sales could be made with 30 seconds intervals. Ice cream sales were also possible under summer or winter outdoor conditions. The present results may be used for the design of food refrigeration machines as well as to optimize other refrigeration cycles.
Keywords
Soft ice cream; R-404A; Optimization; Refrigeration cycle; Performance evaluation;
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Times Cited By KSCI : 1  (Citation Analysis)
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