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http://dx.doi.org/10.5762/KAIS.2017.18.2.719

A Study on the Performance Characteristics of the Soft Ice Cream Machine Run by Refrigerant Mixture (R-290/R-32)  

Kim, Nea-Hyun (Department of Mechanical Engineering, Incheon National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.2, 2017 , pp. 719-725 More about this Journal
Abstract
Frozen milk products are commonly made in small refrigeration machines. R-502 has long been used as a refrigerant for soft ice cream machines, but it is being replaced with R-404A due to the issue of ozone layer depletion. However, R-404A has high global warming potential, so it also needs to be replaced. In this study, a mixture of R-290 and R-32 was considered as a new refrigerant. An optimization and performance evaluation of the mixture were conducted for a freezer volume of 2.8 liters. The focus of the optimization was the appropriate refrigerant charge and the opening of the expansion valve. At the optimized conditions, ice cream was produced in 6 minutes and 24 seconds with the mixture, and the COP was 0.83. For R-404A, the ice cream production time was 6 minutes and 22 seconds, and the COP was 0.90. The results may be used for the design of food refrigeration machines and to optimize other refrigeration cycles.
Keywords
Soft ice cream; R-290/R-32; R-404A; Optimization; Refrigeration cycle; Refrigerant mixture;
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Times Cited By KSCI : 2  (Citation Analysis)
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