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


YAMANKARADENİZ N.

INTERNATIONAL JOURNAL OF EXERGY, vol.39, no.2, pp.195-214, 2022 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.1504/ijex.2022.125524
  • Journal Name: INTERNATIONAL JOURNAL OF EXERGY
  • Journal Indexes: Science Citation Index Expanded, Scopus, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.195-214
  • Keywords: organic Rankine cycle, ORC, vapour compression refrigeration cycle, VCRC, energy performance, exergy, exergoeconomic analysis, ORGANIC RANKINE-CYCLE, THERMODYNAMIC ANALYSIS, WASTE HEAT, OPTIMIZATION, ENERGY, POWER, PERFORMANCE, DRIVEN

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 degrees C-120 degrees 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 (COPsys) 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.