Experimental study on cold storage phase‐change materials and quick‐freezing plate in household refrigerators
2019
Liu, Zhongbao | Lou, Fengfei | Qi, Xin | Wang, Qinghua | Zhao, Banghua | Yan, Jiawen | Shen, Yiyao
In this study, a quick‐freezing plate filled with low‐temperature phase‐change material (PCM) with a mass fraction of 15% was applied in household refrigerator. A single smooth quick‐freezing plate significantly reduced the amount of time required for food to pass through the maximum ice crystal generation zone, and this amount of time was 1/6 or 3/5 of that for the refrigerator in natural convection or air blast freezing. The rate of water loss using air blast freezing was 4.26% compared with that of the a single smooth quick‐freezing plate at only 1.60%. For various thicknesses of the experimental pork, the quick‐freezing effect of the double‐layer surface plate was better than those of the other conditions. For pork thickness of less than 6 mm, the quick‐freezing effect of the single smooth surface plate was better than that of air blast freezing. PRACTICAL APPLICATIONS: In this study, a new quick‐freezing plate with a phase‐change material (PCM) was developed specifically for a domestic refrigerator. The quick‐freezing effect can be equivalent to that of air blast freezing if food thickness does not exceed the specified range. The plate in this study consisted of an aluminum lid, a plastic shell, a cold‐storage agent, and a cold‐storage bag.
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