Efficient ecological function optimization for endoreversible Carnot heat pumps

IF 4.3 3区工程技术 Q1 MECHANICS Journal of Non-Equilibrium Thermodynamics Pub Date : 2025-01-03 DOI:10.1515/jnet-2024-0061

Yiwen Su, Lingen Chen, Yanlin Ge, Huijun Feng

{"title":"Efficient ecological function optimization for endoreversible Carnot heat pumps","authors":"Yiwen Su, Lingen Chen, Yanlin Ge, Huijun Feng","doi":"10.1515/jnet-2024-0061","DOIUrl":null,"url":null,"abstract":"According to the definition of exergy-based efficient ecological-function (EBEEF) which is proposed as product of exergy-based ecological-function (EF) and coefficient of performance (COP) in previous literature, this paper applies the EBEEF to analyze and optimize performance of endoreversible Carnot heat-pumps (ECHPs). Via the ECHP cycle model established in previous literature, EBEEF expression for ECHP cycle model is deduced, relationships among the EBEEF and heating load (HTL) and COP are researched, and performance comparison for ECHP cycle working at the maximum EBEEF and the maximum EF conditions are performed. Results show that relationships among the EBEEF and the HTL and COP are parabolic like ones and the design points of the larger COP and HTL should be selected for designing heat pumps. When the maximum EBEEF is taken as primary objective, the optimized ECHP cycle can improve its COP and reduce its entropy-generation-rate by sacrificing a small amount of its HTL. The EBEEF not only considers the trade-off between the HTL and entropy-generation-rate, but also considers the trade-off between HTL and COP.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"14 1","pages":""},"PeriodicalIF":4.3000,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Non-Equilibrium Thermodynamics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1515/jnet-2024-0061","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

According to the definition of exergy-based efficient ecological-function (EBEEF) which is proposed as product of exergy-based ecological-function (EF) and coefficient of performance (COP) in previous literature, this paper applies the EBEEF to analyze and optimize performance of endoreversible Carnot heat-pumps (ECHPs). Via the ECHP cycle model established in previous literature, EBEEF expression for ECHP cycle model is deduced, relationships among the EBEEF and heating load (HTL) and COP are researched, and performance comparison for ECHP cycle working at the maximum EBEEF and the maximum EF conditions are performed. Results show that relationships among the EBEEF and the HTL and COP are parabolic like ones and the design points of the larger COP and HTL should be selected for designing heat pumps. When the maximum EBEEF is taken as primary objective, the optimized ECHP cycle can improve its COP and reduce its entropy-generation-rate by sacrificing a small amount of its HTL. The EBEEF not only considers the trade-off between the HTL and entropy-generation-rate, but also considers the trade-off between HTL and COP.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

内可逆卡诺热泵高效生态功能优化

根据以往文献中提出的基于exergy-based efficient ecological-function （EBEEF）作为exergy-based ecological-function （EF）和performance coefficient of performance （COP）的乘积的定义，本文将EBEEF应用于内可逆卡诺热泵（ecps）的性能分析和优化。通过前人建立的ECHP循环模型，推导了ECHP循环模型的EBEEF表达式，研究了EBEEF与热负荷（HTL）和COP之间的关系，并对ECHP循环在最大EBEEF和最大EF工况下的性能进行了比较。结果表明：EBEEF与热压比和热压比呈抛物线关系，设计热泵时应选择较大热压比和热压比的设计点；当以最大EBEEF为主要目标时，优化后的ECHP循环可以通过牺牲少量的html来提高COP和降低熵产率。EBEEF不仅考虑了html和熵生成率之间的权衡，而且考虑了html和COP之间的权衡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Journal of Non-Equilibrium Thermodynamics 物理-力学

CiteScore

9.10

自引率

18.20%

发文量

审稿时长

1 months

期刊介绍： The Journal of Non-Equilibrium Thermodynamics serves as an international publication organ for new ideas, insights and results on non-equilibrium phenomena in science, engineering and related natural systems. The central aim of the journal is to provide a bridge between science and engineering and to promote scientific exchange on a) newly observed non-equilibrium phenomena, b) analytic or numeric modeling for their interpretation, c) vanguard methods to describe non-equilibrium phenomena. Contributions should – among others – present novel approaches to analyzing, modeling and optimizing processes of engineering relevance such as transport processes of mass, momentum and energy, separation of fluid phases, reproduction of living cells, or energy conversion. The journal is particularly interested in contributions which add to the basic understanding of non-equilibrium phenomena in science and engineering, with systems of interest ranging from the macro- to the nano-level. The Journal of Non-Equilibrium Thermodynamics　has recently expanded its scope to place new emphasis on theoretical and experimental investigations of non-equilibrium phenomena in thermophysical, chemical, biochemical and abstract model systems of engineering relevance. We are therefore pleased to invite submissions which present newly observed non-equilibrium phenomena, analytic or fuzzy models for their interpretation, or new methods for their description.