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Internally cooled membrane-based absorber for dehumidification and water heating: Validated model and simulation study
Energy Conversion and Management ( IF 8.208 ) Pub Date : 2021-01-12 , DOI: 10.1016/j.enconman.2020.113787
Zhiming Gao; Navin Kumar; Zhiyao Yang; Kyle Gluesenkamp; Ahmad Abuheiba; Saeed Moghaddam; Van D. Baxter

This paper presents a comprehensive model for advanced membrane-based absorber components accounting for three separate fluid streams, one of them providing internal cooling, with complex flow patterns. The model was implemented with various liquid desiccants and their properties (including LiCl, CaCl2, and [emim][OMS] ionic liquid [IL]). The model has been validated using data from two laboratory prototype absorbers, one with CaCl2 as the working fluid and one with an IL as the working fluid. Entropy analysis was further carried out to verify the model and understand effect of internal cooling on the entropy variation of three fluid streams. The developed model and codes are expected to enable detailed configuration optimization and provide in-depth understanding of three-fluid heat and mass exchanger (HMX) performance. The paper also describes parametric studies of the HMX components in utilizing the latent heat removed in space cooling to heat water and numerically explores the unique benefit of its application in a semi-open absorption heat pump water heater. The results show that a single three-fluid HMX has the potential to achieve simultaneous dehumidification and water heating efficiently at cost effectiveness, particularly in hot and humid climates.



中文翻译:

用于除湿和水加热的内部冷却膜基吸收器:验证的模型和仿真研究

本文介绍了一种先进的基于膜的吸收器组件的综合模型,该模型考虑了三种独立的流体流,其中一种提供内部冷却,具有复杂的流型。该模型使用各种液体干燥剂及其性质(包括LiCl,CaCl 2和[emim] [OMS]离子液体[IL])实现。该模型已使用来自两个实验室原型吸收器的数据进行了验证,其中一个带有CaCl 2用作工作流体,使用IL作为工作流体。进一步进行熵分析以验证模型并了解内部冷却对三种流体的熵变化的影响。开发的模型和代码有望实现详细的配置优化,并提供对三流体热质交换器(HMX)性能的深入了解。本文还描述了HMX组件在空间冷却中利用潜热加热水的参数研究,并从数值上探讨了其在半开放式吸收式热泵热水器中的独特优势。结果表明,单一的三流体HMX有潜力以成本效益有效地同时进行除湿和水加热,特别是在炎热和潮湿的气候下。

更新日期:2021-01-13
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