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首页> 外文期刊>Energy Conversion & Management >Exergetic and energetic comparison of LiCl-H2O and LiBr-H2O working pairs in a solar absorption cooling system
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Exergetic and energetic comparison of LiCl-H2O and LiBr-H2O working pairs in a solar absorption cooling system

机译：太阳能吸收式冷却系统中的LiCl-H2O和LiBr-H2O工作对的能量和能量比较

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摘要

The objective of this study is to investigate the use of an alternative working pair in a solar absorption cooling system. LiCl-H2O is the new examined pair and it is compared energetically and exegetically with the conventional pair LiBr-H2O, which is the most usual in air-conditioning applications. The simplest solar cooling system is analyzed in order to focus in the comparison between these working fluids. Specifically, flat plate collectors, coupled with a storage tank, feed the single effect absorption chiller which produces 250 kW cooling at 10 degrees C. The two pairs are examined parametrically for various heat source temperature levels and for three ambient temperature levels (25 degrees C, 30 degrees C and 35 degrees C). The minimization of the collecting area, which means maximum exergetic efficiency, is the optimization goal in every case. The final results show that LiCl-H2O pair performs better in all cases by giving greater exergetic efficiency. More specifically, about 8% lower collecting area is required to cover the demanded cooling load with this working pair. Another interesting result is that the optimum heat source temperature for the LiCl-H2O is roughly lower than the respective for the LiBr-H2O. The system is analyzed in steady state with the commercial software Engineering Equator Solver (EES). (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是研究在太阳能吸收式冷却系统中使用替代工作对的方法。 LiCl-H2O是新检查过的对，它与传统的LiBr-H2O对进行了能量和能量上的比较，后者在空调应用中是最常见的。分析了最简单的太阳能冷却系统，以专注于这些工作流体之间的比较。具体而言，平板式集热器与储罐一起为单效吸收式制冷机供料，该制冷机在10摄氏度下产生250 kW的制冷量。对这两组制冷机进行参数检查，以了解各种热源温度水平和三个环境温度水平（25摄氏度，30摄氏度和35摄氏度）。每种情况下的优化目标都是最大限度地减少收集面积，这就是最大的运动效率。最终结果表明，LiCl-H2O对在所有情况下均能发挥更大的能量效率，从而表现更好。更具体地说，此工作对需要减少大约8％的收集面积来满足所需的冷却负荷。另一个有趣的结果是，LiCl-H2O的最佳热源温度大致低于LiBr-H2O的最佳热源温度。使用商业软件Engineering Equator Solver（EES）对系统进行稳态分析。 （C）2016 Elsevier Ltd.保留所有权利。

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