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首页> 外文期刊>International journal of air-conditioning and refrigeration >Effect of Ejector Location in Absorption Refrigeration Cycles Using Different Binary Working Fluids
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Effect of Ejector Location in Absorption Refrigeration Cycles Using Different Binary Working Fluids

机译：喷射器位置在使用不同二元工作流体的吸收式制冷循环中的影响

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摘要

In this study, three novel modifications of ejector-absorption refrigeration cycles (E-ARC) are investigated to evaluate the effect of ejector location on cycle performances. In the first modification (triple pressure level absorption refrigeration cycle TPL-ARC), the ejector is located at the evaporator inlet. In the second modification (double ejector absorption refrigeration cycle DE-ARC), two ejectors are used; one is located at the evaporator inlet and the other at the absorber inlet, which are coupled to each other. In the third modification (low pressure condenser absorption refrigeration cycle LPC-ARC), the steam ejector is installed at the downstream of the vapor generator discharging line. An additional flow splitter is integrated to the steam ejector outlet and part of the vapor is extracted and returned to the absorber at a pressure equal to the diffuser pressure. Effect of ejector location on thermodynamic performances are evaluated considering three different working fluids, namely ammonia-water solution (NH_3-H_2O), lithium bromide-water solution (H_2O-LiBr), and lithium chloride-water solution (H_20-LiCl). Even though all three configurations enhance the conventional absorption refrigeration cycle (C-ARC) performances, the LPC-ARCs work at high temperature and improve the cycle performance. The TPL-ARC proves to improve the COP and exergy efficiency up to 9.14% and 7.61%, respectively, presenting the highest thermodynamic performance enhancement and lowest operating temperature.
机译：在这项研究中，对喷射器吸收式制冷循环（E-ARC）进行了三种新颖的改进，以评估喷射器位置对循环性能的影响。在第一变型中（三重压力水平吸收式制冷循环TPL-ARC），喷射器位于蒸发器入口。在第二变型中（双喷射器吸收式制冷循环DE-ARC），使用了两个喷射器。一个位于蒸发器入口，另一个位于吸收器入口，它们彼此耦合。在第三变型中（低压冷凝器吸收式制冷循环LPC-ARC），蒸汽喷射器安装在蒸汽发生器排放管线的下游。附加的分流器集成到蒸汽喷射器出口，一部分蒸汽被抽出并以等于扩散器压力的压力返回吸收器。考虑三种不同的工作流体，即氨水溶液（NH_3-H_2O），溴化锂水溶液（H_2O-LiBr）和氯化锂水溶液（H_20-LiCl），评估了喷射器位置对热力学性能的影响。即使这三种配置都增强了常规吸收式制冷循环（C-ARC）的性能，LPC-ARC仍可在高温下工作并改善循环性能。 TPL-ARC证明分别提高了COP和火用效率，分别高达9.14％和7.61％，具有最高的热力学性能增强和最低的工作温度。

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