International Journal of Refrigeration ( IF 3.9 ) Pub Date : 2020-09-09 , DOI: 10.1016/j.ijrefrig.2020.09.006 Deniz Yilmaz , Ebru Mancuhan , Barış Yılmaz
In this study, the influence of phase change material (PCM) location in a closed display cabinet cooled by a transcritical CO2 refrigeration system was examined experimentally. Two configurations have been investigated where PCM panels are placed on the backside and the shelves of the cabinet. The effect of PCM locations on the cabinet air temperature and compressor power consumption is evaluated and compared during periods of 24 and 8 h of operation. The variation of in the cabinet air temperatures and power consumption with time is measured during charging, running, and power failure periods. It is found that installing PCMs on the shelves of the cabinet is more advantageous and promising in terms of both maintaining cabinet air temperature homogeneous and keeping it at certain average temperature levels. For PCM on the shelves case, energy saving is found 4.4% less than without PCM case. On the other hand, PCM on the backside case results in 8% more energy consumption. Moreover, the running time is found 15.8 less for PCM on the shelves case. Therefore, PCM on shelves case is concluded to be the best option for PCM utilization in the present study.
中文翻译:
经跨临界CO 2系统冷却的商用展示柜中PCM位置的实验研究
在这项研究中,相变材料(PCM)位置在由跨临界CO 2冷却的密闭展示柜中的影响对制冷系统进行了实验检查。已经研究了两种配置,其中PCM面板放置在机柜的背面和架子上。在运行24小时和8小时的过程中,将评估并比较PCM位置对机柜空气温度和压缩机功耗的影响。在充电,运行和电源故障期间,测量机柜空气温度和功耗随时间的变化。发现在将机柜的空气温度保持均匀并且将其保持在一定的平均温度水平方面,将PCM安装在机柜的架子上是更加有利和有前途的。对于货架上的PCM,与不使用PCM的情况相比,节能量减少了4.4%。另一方面,背面外壳的PCM可使能耗增加8%。此外,货架上的PCM的运行时间减少了15.8倍。因此,在本研究中,结论是PCM搁架案例是PCM利用的最佳选择。