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Energies 2017, 10(4), 532; doi:10.3390/en10040532

Exergoeconomic Performance Comparison and Optimization of Single-Stage Absorption Heat Transformers

1
Faculty of Mechanical Engineering, University of Tabriz, Tabriz 51368, Iran
2
Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON L1H 7K4, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Robert Lundmark
Received: 19 December 2016 / Revised: 16 March 2017 / Accepted: 7 April 2017 / Published: 14 April 2017
(This article belongs to the Special Issue Applied Energy System Modeling 2016)
View Full-Text   |   Download PDF [7684 KB, uploaded 14 April 2017]   |  

Abstract

Three single-stage absorption heat transformer (SSHT) configurations are modeled, analyzed and compared from the viewpoints of thermodynamics and economics, using the Engineering Equation Solver (EES) software. In addition, a multi-objective optimization is carried out for the three configurations to specify the optimal design point considering the second law efficiency and the product unit cost as two objective functions. The configurations differ from one another considering the number of heat exchangers used in them. The results show that the coefficient of performance (COP) and exergy coefficient of performance (ECOP) for configuration 3 are around 35% and 30% higher than the corresponding values for configuration 1, respectively. Also, configuration 2 is found to be more economic with a product unit cost of about 21% and 5% lower than those for configurations 1 and 3, respectively. Furthermore, it is observed that relatively higher absorber temperatures can be achieved by configurations 2 and 3 compared to configuration 1. It is concluded from the multi-objective optimization that the conditions at which the evaporator, condenser and absorber temperatures are 86.51 °C, 39.03 °C and 123.1 °C, respectively, represents an optimal solution. View Full-Text
Keywords: absorption heat transformer; single-stage absorption heat transformer (SSHT); thermoeconomic; heat exchanger; exergy efficiency; multi-objective optimization absorption heat transformer; single-stage absorption heat transformer (SSHT); thermoeconomic; heat exchanger; exergy efficiency; multi-objective optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

S. Mahmoudi, S.M.; Salehi, S.; Yari, M.; Rosen, M.A. Exergoeconomic Performance Comparison and Optimization of Single-Stage Absorption Heat Transformers. Energies 2017, 10, 532.

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