Absorption Refrigerating Machine, Heat Pump and Dehumidifier Using Water+Ethylene Glycol+Lithium Chloride System and Water+Lithium Chloride System

本研究旨在探讨水+乙二醇+氯化锂系统（氯化锂：乙二醇=4.9:1.0质量）是否适用于吸收式制冷机和热泵。在不同温度和吸收剂浓度下，测量了氯化锂+乙二醇水溶液的物理性质（密度、粘度、表面张力、溶解度和蒸气压）和热性质（热容量和混合热）。根据实验数据，得到了这些三元体系的密度、粘度、表面张力、溶解度和热容的经验公式。蒸汽压数据以antoine型方程相关。混合数据以Redlich-Kister型方程相关。通过对性能系数的理论分析，考察了水+乙二醇+氯化锂体系的性能特点。利用吸收式制冷机和吸收式热变压器在不同温度、压力和吸收剂浓度下的焓值计算了吸收式制冷机和吸收式热变压器的性能系数。采用两种吸收式制冷机、两种吸收式热变压器、两种混合循环和一种双循环进行仿真。并与水+溴化锂体系、水+氯化锂体系、水+溴化锂+乙二醇体系和水+溴化锂+二乙二醇体系的性能特性进行了比较。此外，通过改变氯化锂水溶液的流速，对该除湿机进出口的细菌数量进行了检测。除湿机启动运行90分钟后未检出细菌。在使用氯化锂水溶液的除湿机中，证明有足够的杀菌力。研究了几种表面活性剂作为细菌灭菌剂对氯化锂水溶液的最小抑制浓度。少

This investigation was undertaken to examine whether the water + ethylene glycol + lithium chloride system (lithium chloride: ethylene glycol=4.9 : 1.0 mass) are suited for absorption refrigerating machines and heat pumps. Measurements of the physical properties (density, viscosity, surface tension, solubility and vapor pressure) and the thermal properties (heat capacity and heat of mixing) of lithium chloride+ethylene glycol aqueous solutions were carried out at various temperatures and absorbent concentrations. Empirical formulae of the density, viscosity, surface tension, solubility and heat capacity of these ternary systems were obtained from experimental data. The vapor pressure data were correlated as an Antoine-type equation. The hear of mixing data were correlated as a Redlich-Kister type equation. A theoretical analysis of the coefficient of performance was undertaken to examine the performance characteristics of the water + ethylene glycol + lithium chloride system. The coeff … More icient of performance for absorption refrigerating machines and absorption heat transformers was calculated using the enthalpies at various temperatures, pressures and absorbent concentrations. Two types of absorption refrigerating machines, two types of absorption heat transformers, two types of hybrid cycles, and a dual cycle were adopted for simulation. The performance characteristics of these systems were compared with those of the water + lithium bromide system, the water + lithium chloride system, the water + lithium bromide + ethylene glycol system and the water + lithium bromide + diethylene glycol system. Furthermore, by changing flow rate of lithium chloride aqueous solution, the number of bacteria in entrance and exit of this dehumidifier was examined. Bacteria were not detected from after dehumidifier starting operation 90 minutes. In the dehumidifier using lithium chloride aqueous solution, it was proven that there was sufficient sterilizing power. Minimum inhibition concentration (MIC) of some kinds of surface active agents as additive of lithium chloride aqueous solution using bacteria sterilizer were examined. Less