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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Equivalent Carnot cycle concept applied to a thermochemical solid/gas resorption system
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Equivalent Carnot cycle concept applied to a thermochemical solid/gas resorption system

机译：等效卡诺循环概念应用于热化学固体/气体吸收系统

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摘要

Recent work on second law analysis performed on sorption systems has led to the equivalent Carnot cycle concept. Such a tool is very powerful in obtaining rapid and clear analysis of the energy degradation occurring in solid/gas refrigerators. It explains and quantifies the difference between Carnot's coefficient of performance (COP) associated with the three heat reservoir temperatures and the actual COP in terms of entropy productions. It also points out that the equivalent Carnot cycle for the sorption process is not a classical three-temperature Carnot cycle. In fact, the energy exchanged between the absorption/desorption process and the evaporation/condensation process is not mechanical work but takes the form of ΔH-TΔS. This analysis is performed here for the solid/gas resorption system, involving two reactors, one driving the cycle, the other devoted to cold production. Such a development is depicted through combined first and second law analysis and illustrated on (T, Q/T) diagrams built previously for solid/gas equilibrium. The equivalent Carnot cycle shows that, in this case, avoiding gas exchange between the two sub-systems allows exchange of mechanical work, leading to higher values of COP.
机译：在吸附系统上进行的第二定律分析的最新工作导致了等效的卡诺循环概念。这样的工具在快速，清晰地分析固体/气体制冷机中发生的能量退化方面非常强大。它以熵产的方式解释和量化了与三个储热器温度相关的卡诺性能系数（COP）与实际COP之间的差异。它还指出，吸附过程的等效卡诺循环不是经典的三温卡诺循环。实际上，吸收/解吸过程与蒸发/冷凝过程之间交换的能量不是机械功，而是采用ΔH-TΔS的形式。在此对固体/气体吸收系统进行此分析，该系统涉及两个反应器，一个反应器驱动循环，另一个反应器用于冷气生产。通过组合的第一定律和第二定律分析来描述这种发展，并在先前为固/气平衡建立的（T，Q / T）图中进行说明。等效的卡诺循环表明，在这种情况下，避免两个子系统之间的气体交换可以交换机械功，从而导致更高的COP值。

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