Title: Exergy and exergoeconomic analyses of an ORC-assisted vapour compression refrigeration cycle

Authors: Nurettin Yamankaradeniz

Addresses: Department of Mechanical Engineering, Faculty of Engineering, Bursa Uludag University, 16059, Bursa, Turkey

Abstract: In this study, the thermodynamic performance of a vapour compression refrigeration cycle (VCRC) in which an organic Rankine cycle (ORC) has integrated and that generates electricity by utilising a geothermal source is investigated. The system's energy and exergy performance has evaluated by using various refrigerants used in the ORC system, depending on the evaporator (ORC) temperature (70°C-120°C), and an exergoeconomic analysis has performed to determine optimum operating conditions. As a function of the refrigerant and evaporator temperature, the coefficient of performance (COP_sys) of the integrated system has varied between 0.55 and 1.01, whereas the exergy efficiency has varied between 14.20% and 20.16%. The unit exergy cost of the cooled air has been determined as 27.22 USD/GJ under the optimum operating conditions.

Keywords: organic Rankine cycle; ORC; vapour compression refrigeration cycle; VCRC; energy performance; exergy; exergoeconomic analysis.

DOI: 10.1504/IJEX.2022.125524

International Journal of Exergy, 2022 Vol.39 No.2, pp.195 - 214

Received: 22 Dec 2021
Accepted: 09 Jan 2022
Published online: 13 Sep 2022 *

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