Entropy Generation Minimization of Vapour Absorption Heat Transformer

S. Sekar, P. Chandrasekar, S. Kumar, Abraham J.S. Jospher, R. Sheeja, T. N. Valarmathi, G. M. Lionus Leo

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Vapour absorption heat transformers (VAHT) are thermally operated systems, capable of upgrading waste heat or any low-grade energy such as solar and geothermal energy into useful levels. This paper presents the entropy generation minimization analysis of vapour absorption heat transformer system with water/lithium bromide as working fluid pair. A mathematical model has been developed to predict the performance of the system along with the entropy generation at various operating conditions, such as temperatures of components. Thermodynamic properties of each point in the cycle are calculated using related equations of state. The results show that higher coefficients of performance (COP) values are obtained at higher generator temperatures and lower condenser temperatures. At higher generator temperatures, total entropy generation of the system increases. Maximum entropy generation occurs in the condenser at various operating conditions. The minimum entropy generation conditions, leading to the maximization of the COP are located.

Original languageEnglish
Title of host publicationTheoretical, Computational, and Experimental Solutions to Thermo-Fluid Systems - Select Proceedings of ICITFES 2020
EditorsMuthukumar Palanisamy, Velraj Ramalingam, Murugan Sivalingam
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages10
ISBN (Print)9789813341647
Publication statusPublished - 2021
EventInternational Conference on Innovations in Thermo-Fluid Engineering and Sciences, ICITFES 2020 - Rourkela, India
Duration: 10-02-202012-02-2020

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


ConferenceInternational Conference on Innovations in Thermo-Fluid Engineering and Sciences, ICITFES 2020

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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