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Finite Time Analysis of a Tri-Generation Cycle

Lookup NU author(s): Professor Brian Agnew, Professor Sara Walker, Dr Ivan CK TamORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


A review of the literature indicates that current tri-generation cycles show low thermal performance, even when optimised for maximum useful output. This paper presents a Finite Time analysis of a tri-generation cycle that is based upon coupled power and refrigeration Carnot cycles. The analysis applies equally well to Stirling cycles or any cycle that exhibits isothermal heat transfer with the environment and is internally reversible. It is shown that it is possible to obtain a significantly higher energy utilisation factor with this type of cycle by considering the energy transferred during the isothermal compression and expansion processes as useful products thus making the energy utilisation larger than the enthalpy drop of the working fluid of the power cycle. The cycle is shown to have the highest energy utilisation factor when energy is supplied from a low temperature heat source and in this case the output is biased towards heating and cooling

Publication metadata

Author(s): Agnew B, Walker S, Ng B, Tam ICK

Publication type: Article

Publication status: Published

Journal: Energies

Year: 2015

Volume: 8

Issue: 6

Pages: 6215-6229

Online publication date: 23/06/2015

Acceptance date: 15/06/2015

Date deposited: 04/09/2015

ISSN (print): 1996-1073

ISSN (electronic): 1996-1073

Publisher: MDPI AG


DOI: 10.3390/en8066215

Notes: This article belongs to the Special Issue Tri-Generation Cycles, Combined Heat, Power and Cooling (CHPC)


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