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首页> 外文期刊>Energy Conversion & Management >Thermodynamic analysis of a novel air-cooled non-adiabatic absorption refrigeration cycle driven by low grade energy
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Thermodynamic analysis of a novel air-cooled non-adiabatic absorption refrigeration cycle driven by low grade energy

机译：低品位能源驱动的新型风冷非绝热吸收式制冷循环的热力学分析

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摘要

An air-cooled type absorption refrigeration cycle using ammonia-lithium nitrate and ammonia-sodium thiocyanate solutions as working fluids are thermodynamically studied in this paper. In the case of many occasions especially small cooling capacity occasion where water cooling is restricted or inconvenient, application of conventional adiabatic absorbers in air-cooled type absorption refrigeration system has been studied by many investigators. Comparing to the adiabatic absorber, a novel air-cooled nonadiabatic absorber is applied to the absorption refrigeration system in this study to improve system performance. It is shown that, system performance has a significant improvement when temperatures of rich ammonia solution at the outlet of absorber decrease under the effect of the heat dissipation capacity of the non-adiabatic absorber. Another advantage is that heat load of the system heat exchangers including generator, solution heat exchanger and air-cooler, decreases with the solution temperature decrease at the outlet of the absorber under the same system cooling capacity condition, which brings benefits to the system cost reduction. Variation of system performance and other system operation parameters with generator temperature, absorption temperature and absorption efficiency has been carried out. Effects of the self-circulation flow rate of the absorber have been studied. A datasheet of system operation parameters has been proposed.
机译：本文以热力学研究了以氨水硝酸锂和氨水硫氰酸钠溶液为工作液的空冷式吸收式制冷循环。在很多情况下，特别是在冷却能力有限或水冷却受限或不方便的情况下，许多研究者已经研究了传统的绝热吸收器在风冷式吸收式制冷系统中的应用。与绝热吸收器相比，本研究将新型风冷非绝热吸收器应用于吸收式制冷系统，以提高系统性能。结果表明，在非绝热吸收塔的散热能力的影响下，当吸收塔出口的浓氨水温度降低时，系统性能有了显着提高。另一个优点是，在相同的系统制冷量条件下，包括发生器，溶液热交换器和空气冷却器在内的系统热交换器的热负荷会随着吸收器出口处溶液温度的降低而降低，这有利于降低系统成本。系统性能和其他系统运行参数随发电机温度，吸收温度和吸收效率的变化而变化。已经研究了吸收器的自循环流速的影响。已经提出了系统操作参数的数据表。

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