Experimental researches on characteristics of vapor–liquid equilibrium of NH3–H2O–LiBr system
Experimental researches on characteristics of vapor–liquid equilibrium of NH3–H2O–LiBr system
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DOI：
10.1016/j.ijrefrig.2005.03.009
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发表时间：
2006-03
期刊：
影响因子：
--
通讯作者：
Yuyuan Wu;Yan Chen;Tiehui Wu
中科院分区：
文献类型：
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作者：
Yuyuan Wu;Yan Chen;Tiehui Wu
针对NH3-H2O吸收式制冷系统的不足，提出了一种改进的NH3-H2O-LiBr吸收式制冷系统。在NH_3-H_2 O-LiBr体系中加入LiBr，可以降低体系中水的含量。用平衡池测定了NH_3-H_2 O-LiBr三元混合物的热性质。在15-85°C之间的10个温度点和高达2 MPa的压力下测量了它们的汽液平衡（VLE）数据的压力-温度数据。溶液的LiBr浓度选择在LiBr在纯水中的质量比的5-60%的范围内。静态测定了NH_3-H_2 O-LiBr三元溶液的汽液平衡。实验结果表明，在T=70°C时，平衡压力降低了30- 50%，气相中水的含量大大降低到2.5%。实验结果表明，新三元体系的性能比NH_3-H_2O体系好得多。
An improved system of NH3–H2O–LiBr was proposed for overcoming the drawback of NH3–H2O absorption refrigeration system. The LiBr was added to NH3–H2O system anticipating a decrease in the content of water in the NH3–H2O–LiBr system. An equilibrium cell was used to measure thermal property of the ternary NH3–H2O–LiBr mixtures. The pressure–temperature data for their vapor–liquid equilibrium (VLE) data were measured at ten temperature points between 15–85°C, and pressures up to 2MPa. The LiBr concentration of the solution was chosen in the range of 5–60% of mass ratio of LiBr in pure water. The VLE for the NH3–H2O–LiBr ternary solution was measured statically. The experimental results show that the equilibrium pressures reduced by 30–50%, and the amount of component of water in the gas phase reduced greatly to 2.5% at T=70°C. The experimental results predicted much better characteristics of the new ternary system than the NH3–H2O system for the applications.