Thermodynamic properties and corrosivity of a new absorption heat pump working pair: Lithium nitrate+1-butyl-3-methylimidazolium bromide plus water
Thermodynamic properties and corrosivity of a new absorption heat pump working pair: Lithium nitrate+1-butyl-3-methylimidazolium bromide plus water
复制标题
新型吸收式热泵工作对的热力学性质和腐蚀性：硝酸锂1-丁基-3-甲基溴化咪唑加水
DOI：
10.1016/j.fluid.2017.07.024
复制
发表时间：
2017-11-15
影响因子：
2.6
通讯作者：
Su, Qingquan
中科院分区：
文献类型：
--
作者：
Luo, Chunhuan;Li, Yiqun;Su, Qingquan
针对LiNO_3/H_2O吸收工质对结晶温度高和[BMIM]Br/H_2O吸收工质对粘度大的缺点，提出了LiNO_3-IBMIMIBr/H_2O三元吸收工质对。测定了LiNO 3与[BMIM]Br质量比为2：1的三元体系的结晶温度、蒸气压、密度、粘度、比热容和溶解焓。基于测量的比热容和溶解焓计算比焓。通过最小二乘法得到了这些热力学性质的回归方程。结果表明，LiNO 3-[BMIM]Br/H2O与LiNO 3/H2O相比，在质量浓度降低10%的情况下，具有几乎相同的蒸气压。同时，在相同的吸附能力下，LiNO 3-[BMIM]Br/H2O的结晶温度远低于LiNO 3/H2O，粘度远低于IBMIMIBr/H2O。在587.75 K以下，LiNO 3-[BMIM]Br/H2O具有可靠的热稳定性。LiNO 3-[BMIM]Br/H2O对碳钢和铜的腐蚀性大于LiNO 3/H2O，但明显小于LiBr/H2O。LiNO_3-[BMIM]Br/H_2O作为一种替代工质，在吸收式热泵中具有很大的应用潜力，特别是在高温下。(C)2017由Elsevier B. V.出版
LiNO3-IBMIMIBr/H2O ternary system has been proposed as a new absorption working pair to improve the shortcomings of high crystallization temperature for LiNO3/H2O and high viscosity for [BMIM]Br/H2O working pairs. The crystallization temperature, vapor pressure, density, viscosity, specific heat capacity, and dissolution enthalpy of this ternary system at a mass ratio of 2:1 (LiNO3 to [BMIM]Br) were measured. The specific enthalpy was calculated based on the measured specific heat capacity and dissolution enthalpy. Regression equations for these thermodynamic properties were obtained by a least squares method. Results showed that LiNO3-[BMIM]Br/H2O had nearly identical vapor pressure with that for LiNO3/H2O at a 10% lower mass concentration. Meanwhile, under the same absorption ability, LiNO3-[BMIM]Br/H2O had much lower crystallization temperature than LiNO3/H2O, and much lower viscosity than IBMIMIBr/H2O. At the temperature below 587.75 K, LiNO3-[BMIM]Br/H2O has a reliable thermal stability. The corrosivity of LiNO3-[BMIM]Br/H2O to carbon steel and copper was larger than that of LiNO3/H2O, while obviously less than that of LiBr/H2O. As an alternative working pair, LiNO3-[BMIM]Br/H2O shows a great potential in absorption heat pump, especially at high temperature. (C) 2017 Published by Elsevier B.V.