离子液体＋水作为吸收式制冷工质对具有诸多优点，其热力学性质是衡量工质对优劣及热力学计算的重要基础数据．本文研究两种水溶性离子液体EMIMAC和HMIMCl及其水溶液的热力学性质，主要对这两种离子液体及其水溶液的密度和比热进行测定．密度测试采用比重天平，比热测试采用耐驰DSC204HP低温高压差热仪，测试精度较高且测试系统稳定可靠．密度实验测试的温度范围为298．15～393．15K，比热实验测试温度范围为283．15-413．15K，测试的离子液体摩尔浓度分别为1，0．8，0．6，0．4，0．2，0．研究结果为这两种离子液体的吸收式制冷应用提供了可靠的热物性数据．
Ionic liquid ＋ water as absorption refrigeration working pairs have been found many advantages and their thermal properties are key bases for evaluation of the operational characteristics in thermodynamic systems. In this study, two kinds of water-soluble ionic liquids, EMIMAC and HMIMCl, as well as their aqueous solutions were tested for density and specific heat data. The density data were measured with a weight-balance liquid density tester in range of 298. 15~393. 15K and the heat capacity were measured with a NETZSCH DSC204HP test system in range of 283.15-413. 15K. The molar fractions of the ionic liquids in the tested aqueous solutions were 1.0, 0. 8, 0. 6, 0. 4, 0. 2, respectively. The results have provided a reliable thermal property data base for the ionic liquid- water absorption refrigeration applications.
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