2024-03-28T15:05:53Zhttps://gredos.usal.es/oai/requestoai:gredos.usal.es:10366/1398372022-02-07T15:42:07Zcom_10366_138605com_10366_4512com_10366_3823col_10366_138606
Juncheng, Guo
Hanxin, Yang
Houcheng, Zhang
González Ayala, Julián
Mateos Roco, José Miguel
Calvo Hernández, Antonio
Medina Domínguez, Alejandro
2019-09-06T08:12:44Z
2019-09-06T08:12:44Z
2019-08
Energy Conversion and Management. https://doi.org/10.1016/j.enconman.2019.111917
http://hdl.handle.net/10366/139837
10.1016/j.enconman.2019.111917
[EN]In order to investigate the performance of a class of thermally driven refrigerators, usually driven by low-grade
thermal energy, a generic thermodynamic model of three-heat-source refrigerator without involving any specific
heat-transfer law is put forward by adopting low-dissipation assumptions. Based on the proposed model, the
analytical expressions for the coefficient of performance (COP) and cooling power of the system are derived in
terms of well-defined dissipation parameters and contact time durations between the system and heat reservoirs.
One essential parameter accounting for the size ratio of the two coupled subsystems inside the overall system is
introduced in light of the practical meaning of the reversible entropy change. With the help of the aforementioned
parameter, the optimal relation between the COP and cooling power is obtained. The optimal operation
region and optimal construction of the overall system are further determined for the first time. In addition, the
influences of the dissipation and temporal symmetries are discussed in detail, according to which the upper and
lower bounds of the COP at maximum cooling power are firstly obtained under two extreme situations.
Experimental and simulated data from previous reported works are collected to illustrate the validity and
practical significance of the proposed model and associated results. A limit case is presented to highlight the
generality of the model.
National Natural Science Foundation of China ; Junta de Castilla y León of Spain ; University of Salamanca contract 2017/X005/1.
application/pdf
eng
Elsevier Science Publishers (Amsterdam, Países Bajos)
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Thermally driven refrigerator
Low-dissipation assumption
Three-heat-source refrigerator model
Bound of performance coefficient
Comparison with experimental data
2213 Termodinámica
Thermally driven refrigerators: Equivalent low-dissipation three-heat-source model and comparison with experimental and simulated results
info:eu-repo/semantics/article
SA017P17