Performance simulation and geometries optimization of microchannel membrane-based absorption heat pump working with ionic liquids

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review

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Original languageEnglish
Publication statusPublished - Dec 2020

Conference

Title12th International Conference on Applied Energy (ICAE2020)
LocationVirtual
CityBangkok
Period1 - 10 December 2020

Abstract

Membrane-based absorption heat pump (MAHP) replaces traditional falling-film absorbers/desorbers with membrane-based modules, showing its merits in size reduction and heat/mass transfer enhancement. This paper applies the microchannel technology to further improve these two merits of MAHP. Meanwhile, ionic liquids (ILs) mixtures are used as working fluids to avoid the crystallization. The performance of microchannel MAHP system using H2O/[DMIM][DMP] is simulated under various operating conditions and compared with H2O/LiBr. Results show that the applicability of H2O/LiBr is constrained by crystallization at high 𝑇, and H2O/[DMIM][DMP] is limited at high 𝑇𝑐𝑤. Besides, H2O/[DMIM][DMP] performs better in cooling COP than H2O/LiBr when 𝑇>94°C or 𝑇𝑒>7°C. Finally, by optimizing the geometrical parameters of microchannel membrane-based absorbers/desorbers in MAHP cycle working with H2O/[DMIM][DMP], a Pareto frontier is obtained to provide the balance guidance between the compactness and COP for reasonable microchannel MAHP geometry design.

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Information for this record is supplemented by the author(s) concerned.

Citation Format(s)

Performance simulation and geometries optimization of microchannel membrane-based absorption heat pump working with ionic liquids. / Zhai, Chong; Wu, Wei; Sun, Qin; Dong, Kaijun; Leung, Michael.

2020. Paper presented at 12th International Conference on Applied Energy (ICAE2020)
, Bangkok.

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review