微通道冷凝器在展示柜上的应用研究

Application of Microchannel Condenser on Performance Improvement of Display Cabinet

针对卧式冷藏展示柜能耗较高,在环境温度升高时制冷效果下降等问题,提出采用传热系数较高的微通道换热器作为冷藏展示柜的冷凝器。实验对比结果表明:新改进的展示柜解决了高温工况下制冷效果下降和压缩机不停机等问题,展示柜的能耗也显著降低。在环境温度为16、25、32℃工况下空柜测试,与管外面积相差在3%以内丝管式冷凝器相比,微通道冷凝器分别节能11. 67%、24. 85%、45. 64%,开停比分别下降7. 20%、14. 90%、31. 70%。

Given the high-energy consumption of a display cabinet and the serious decrease of refrigeration capacity in cases of high ambient temperature,a refrigeration display cabinet with microchannel condenser was developed. The performance of the developed display cabinet was tested and compared with the one with traditional wire-tube condenser. It shows that display cabinet with microchannel condenser solves the problems resulting from the poor refrigeration effect of display cabinets under high-temperature conditions and the shutdown of the compressor because of the high heat transfer coefficient as the condenser. Furthermore,it significantly reduces the energy consumption of display cabinet. At ambient temperatures of 16 ℃,25 ℃,and 32 ℃,the energy can be saved by 11.67%,24.85%,and 45.64% respectively. Moreover,the on/off ratio is decreased by 7.20%,14.90%,and 31.70%,respectively.