摘要
为了提高刮削法制冰系统的制冷系数和㶲效率,本文基于热力学定律对刮削法制冰系统进行热力学分析,研究了制冷剂种类、冷凝温度、环境温度以及蒸发温度等因素对刮削法制冰系统的影响。通过单因素实验设计计算系统的㶲损系数和㶲效率,可以通过降低冷凝温度、提高蒸发温度以及更换高效制冷剂NCUR01来提高系统的效率,来达到优化系统的目的。同时设计四因素三水平的正交实验进行极差分析,得到这四个因素对实验结果影响的主次顺序为:制冷剂种类、冷凝温度、蒸发温度、环境温度,制冷剂种类对目标值有最为显著的影响。在制冷剂工质为NCUR01,冷凝温度为10℃,环境温度为12℃,蒸发温度为−5℃时,系统的制冷系数ε = 4.97和㶲效率h = 47.1%达到最优值,制冷剂种类对目标值有最为显著的影响。通过本研究,可以得到各因素对系统影响的规律,选择合理的实验方案,为系统的优化设计提供指导。
Inorder to improve the coefficient of refrigeration and exergy efficiency of thescraping ice-making system, this paper conducts a thermodynamic analysisof the scraping ice-making system based on the law of thermodynamics, andstudies the influences of type of refrigerant, condensation temperature,ambient temperature, and evaporating temperature on the ice scraping system.The exergy loss coefficient and exergy efficiency of the system are calculatedthrough single-factor experimental design. The efficiency of the system can beimproved by reducing the condensation temperature, increasing the evaporationtemperature and replacing the high-efficiency refrigerantNCUR01 to achieve the purpose of optimizing the system. At the same time, afour-factor and three-level orthogonal experiment was designed for rangeanalysis, and the order of the four factors’ influence on the experimentalresults was as follows: refrigerant type, condensation temperature, evaporatingtemperature, ambient temperature;and the type of refrigerant has the mostsignificant effect on the target value. When the refrigerant is NCUR01, thecondensation temperature is 10℃, the ambienttemperature is 12℃, and the evaporation temperature is −5℃, the system’srefrigeration coefficient ε = 4.97and efficiency η = 47.1%, which reachthe optimal value. The type of refrigerant has the most significant effect onthe target value. Through this research, we can get the law of the influence ofvarious factors on the system, choose a reasonable experimental plan, andprovide guidance for the optimal design of the system.
出处
《传感器技术与应用》
2021年第3期141-152,共12页
Journal of Sensor Technology and Application
