Performance optimization of diffusive mass transfer law irreversible isothermal chemical pump

Lingen Chen, Shuangshuang Shi, Yanlin Ge and Huijun Feng

Energy, 2023, vol. 263, issue PC

Abstract: Performance optimization of generalized irreversible isothermal chemical pump (GICP) cycle with two-mass-reservoirs is performed. Three types of losses, that is, irreversible mass-transfer (IMT) between reservoir and working medium, internal dissipation (ID) inside working medium, and mass-leakage (ML) between reservoirs are included in GICP cycle. Diffusive mass transfer law (MTL) is assumed in IMT and ML processes. Performance relationship between rate of energy pumping (REP) and coefficient of performance (COP) is obtained using numerical examples, and it includes special examples with different loss items, which are derived analytically. The COP versus REP characteristic behaves a parabolic-like cure, that is, COP has maxima at an optimal REP. The COP and REP of GICP with diffusive MTL are compared with those with linear MTL. The effects of chemical potential ratio of mass-reservoirs, IMT, ML and ID on the COP versus REP characteristics are also shown. Maximum COP and the corresponding REP with diffusive MTL are smaller than those with linear one. COP increases monotonically as REP decreases when ML can be ignored. If ML is considered, COP versus REP characteristic behaves parabolic-like one whether ID is ignored or not. Optimal performances are affected by ML qualitatively and by ID quantitatively.

Keywords: Irreversible chemical pump; Diffusive mass transfer law; Internal dissipation; Mass leakage; Irreversible mass-transfer; Finite-time thermodynamics (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pc:s0360544222028420

DOI: 10.1016/j.energy.2022.125956

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