Title: Thermodynamic analysis of ejector-absorption refrigeration cycle using the second thermodynamic law

Authors: G.K. Alexis

Addresses: Lab of Cooling – Heating and Air-Conditioning, Department of Mechanical Engineering, Technological Education Institute of Piraeus, 250, Thivon & P. Ralli, 122 44 Athens, Greece

Abstract: The exergy analysis of an ejector-absorption refrigeration system (EARS) for cooling applications using LiBr-H2O is presented in this paper. A computer simulation programme is developed for the cycle and used to determine the coefficient of performance and the second law efficiency of the EARS. Also, the exergy destruction and heat rate in each component of the system are estimated under different operating conditions. According to the results obtained, the ejector performs the higher (37.81%) and the pump the lower (0.30%) exergy destruction of the system when the ambient temperature is 30°C, the generator temperature 150°C, the evaporator temperature 5°C and the mass entrainment ratio 0.5.

Keywords: absorption; ejector; lithium bromide; thermodynamics; refrigeration cycle; second law; exergy analysis; simulation; heat rate; exergy destruction; temperature; mass entrainment ratio.

DOI: 10.1504/IJEX.2014.060281

International Journal of Exergy, 2014 Vol.14 No.2, pp.179 - 190

Received: 24 Oct 2012
Accepted: 12 Mar 2013

Published online: 02 Mar 2015 *

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