Performance implications of chemical absorption for the carbon-dioxide-cofluid refrigeration cycle
Performance implications of chemical absorption for the carbon-dioxide-cofluid refrigeration cycle
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DOI：
10.1016/j.ijrefrig.2014.06.014
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
G. Mozurkewich;Luke D. Simoni;M. Stadtherr;W. Schneider
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文献类型：
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作者：
G. Mozurkewich;Luke D. Simoni;M. Stadtherr;W. Schneider
在二氧化碳-共流体制冷循环中，二氧化碳的冷凝和蒸发被非挥发性液体(“共流体”)的吸收所取代。本文研究了这种循环的制冷性能是否可以通过使用对二氧化碳表现出化学亲和力的辅助流体在理论上得到改善。用类朗缪尔模型描述CO2吸收的热力学，通过求解一组物理方程来计算稳态性能指标。具有足够强的CO2亲和力的化学吸收共流体预计将比物理共流体具有更高的比冷量和性能系数(COP)，也比跨临界CO2具有更高的COP。化学吸收强度的有效范围受到实际考虑的限制，如理想的操作压力。
In a CO2-cofluid refrigeration cycle, CO2condensation and evaporation are replaced by absorption into and out of a non-volatile liquid (“cofluid”). This paper investigates whether the refrigeration performance of such a cycle can be improved in theory by using a cofluid that exhibits chemical affinity for CO2. A Langmuir-like model is used to represent the thermodynamics of CO2absorption, and steady-state performance metrics are computed by solving a set of physically based equations. Chemically absorbing cofluids having sufficiently strong affinity for CO2are predicted to have higher specific cooling capacity and higher coefficient of performance (COP) than physical cofluids and also higher COP than transcritical CO2. The useful range of chemical absorption strength is limited by practical considerations like desirable operating pressures.