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

采用水乙二醇氯化锂系统和水氯化锂系统的吸收式制冷机、热泵和除湿机

基本信息

批准号：
13650239
负责人：
UEMURA Tadashi
金额：
$ 1.86万
依托单位：
Kansai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

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

本次调查的目的是检验水+乙二醇+氯化锂系统（氯化锂：乙二醇=4.9：1.0质量）是否适合吸收式制冷机和热泵的物理性质（密度、粘度、表面张力）的测量。在不同温度下对氯化锂+乙二醇水溶液的热性能（热容和混合热）进行了测试这些三元系统的密度、粘度、表面张力、溶解度和热容的经验公式由实验数据获得，蒸汽压数据被关联为安托万型方程。对性能系数进行了理论分析，以检验水+乙二醇+氯化锂系统的吸收性能系数。采用不同温度、压力和吸收剂浓度下的焓来计算制冷机和吸收式换热器，采用两种类型的吸收式制冷机、两种类型的吸收式换热器、两种类型的混合循环和双循环进行模拟。将这些体系的性能特征与水+溴化锂体系、水+氯化锂体系、水+溴化锂+乙二醇体系和水+锂体系进行了比较。此外，通过改变氯化锂水溶液的流量，检查该除湿器的入口和出口处的细菌数量，在使用氯化锂的除湿器中，在除湿器开始运行90分钟后没有检测到细菌。水溶液中，证明了某些表面活性剂作为锂添加剂有足够的杀菌能力。氯化物水溶液用细菌灭菌器进行了检查。