基于爱因斯坦制冷循环的单压系统改进的研究

Redesign Analysis of Single Pressure Absorption System on Einstein Refrigeration Cycle

综述了爱因斯坦单压吸收式制冷循环装置的发展历程和研究现状,针对其中的不足提出一种改进型单压吸收式制冷装置,通过对该系统建立热力学模型,应用P-T方程和P-R混合规则模拟出系统中正丁烷-氨、氨-水工质组的相平衡参数曲线,和各状态点的状态点的初始参数,探究了蒸发温度、冷凝温度、发生温度等因素对系统性能的影响。模拟结果表明:系统COP及制冷量随蒸发温度的升高而增加,随着冷凝温度升高而降低,系统COP呈下降趋势,冷凝温度上限为48℃;当发生温度在100~120℃范围变化时,系统COP随发生温度升高而增加。相对而言,系统COP对发生温度的变化最敏感,发生温度次之,再次是冷凝温度。模拟结果为后续试验台搭建提供了理论参考。

The single pressure absorption refrigeration equipment developed was analyzed. In view of the deficiency in the design,a modified single pressure absorption refrigeration device was proposed,which was discussed through establishing the thermodynamic model based on the engineering thermal physics basis theory and empirical analysis method. The P-T state equation and P-R mixing rule was used to calculate the phase equilibrium parameters of the working medium group of butane-ammonia and ammonia-water in the single pressure of absorption refrigeration improvement system,whose the initial operation parameters of the improved system was confirmed. The simulation results show that the system's COP and cooling capacity increases with the increasing of evaporation temperature increases,decreases with the increase of the condensation temperature,the COP of the system showed a downward trend,condensing temperature limit for 48℃; when the temperature change in the range of 100 to 120℃,the COP of the system with temperature rise increased. In contrast,the system COP is the most sensitive to the temperature change,the temperature is the second,and the condensation temperature is again. In order to build the experiment platform lately and the system process scheme of operation steps selection and relevant operation method was creatively put forward.