Computational fluid dynamic analysis of an adsorption-based cogeneration osmotic heat engines with stepwise porosity distribution

被引：3
作者：
Zhao, Yanan [1 ]
Li, Mingliang [1 ]
Long, Rui [1 ]
Liu, Zhichun [1 ]
Liu, Wei [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China
来源：
CHEMICAL ENGINEERING SCIENCE | 2023年 / 282卷
基金：
中国国家自然科学基金;
关键词：
Osmotic heat engine; Adsorption; Computational fluid dynamic model; Stepwise porosity; Cogeneration; MASS-TRANSFER; ADSORBENT BED; GENERATION SYSTEM; POWER-GENERATION; THERMODYNAMICS; ELECTROLYTES; ELECTRICITY; MODEL;
D O I：
10.1016/j.ces.2023.119347
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Adsorption-based osmotic heat engines offer an alternative way for converting ultra-low temperature waste heat into electricity. Here, considering the heat and mass transfer characteristics in the adsorbent bed, a computational fluid dynamic model is developed to describe the adsorption-based osmotic heat engine for power and refrigeration cogeneration. Impacts of the porosity distribution, adsorption time, switching time, fin number and working solution-adsorbent pairs on system performance are comprehensively analyzed under different porosity distribution configurations. Results reveal that Configuration I leads to higher coefficient of performance (COP), exergy efficiency. However, Configuration II renders higher electrical efficiency. Compared with the uniform porosity configuration, COP and exergy efficiency are respectively elevated by 1.96% and 1.19% under the stepwise porosity configuration of 0.3-0.5. The electrical efficiency is increased by 15.5% with porosity configuration of 0.7-0.2. LiCl and AQSOA-Z02 under the stepwise porosity configuration of 0.7-0.2 can lead to the highest exergy efficiency of 7.76%.
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页数：13
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