Thermodynamic modeling and performance analysis of the variable-temperature heat reservoir absorption heat pump cycle
Xiaoyong Qin,
Lingen Chen,
Yanlin Ge and
Fengrui Sun
Physica A: Statistical Mechanics and its Applications, 2015, vol. 436, issue C, 788-797
Abstract:
For practical absorption heat pump (AHP) plants, not all external heat reservoir heat capacities are infinite. External heat reservoir heat capacity should be an effect factor in modeling and performance analysis of AHP cycles. A variable-temperature heat reservoir AHP cycle is modeled, in which internal working substance is working in four temperature levels and all irreversibility factors are considered. The irreversibility includes heat transfer irreversibility, internal dissipation irreversibility and heat leakage irreversibility. The general equations among coefficient of performance (COP), heating load and some key characteristic parameters are obtained. The general and optimal characteristics are obtained by using numerical calculations. Besides, the influences of heat capacities of heat reservoirs, internal dissipation irreversibility, and heat leakage irreversibility on cycle performance are analyzed. The conclusions can offer some guidelines for design and operation of AHP plants.
Keywords: Finite-time-thermodynamics; Absorption heat pump; Variable-temperature heat reservoir; Four-temperature-level (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:436:y:2015:i:c:p:788-797
DOI: 10.1016/j.physa.2015.05.081
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