Thermodynamic and Thermo-economic Analysis of Integrated Organic Rankine Cycle for Waste Heat Recovery from Vapor Compression Refrigeration Cycle

Muhammad Asim, Michael K.H. Leung, Zhiqiang Shan, Yingying Li, Dennis Y.C. Leung, Meng Ni

Research output: Journal article publicationConference articleAcademic researchpeer-review

21 Citations (Scopus)


Published by Elsevier Ltd. In the present study, an integrated air-conditioning-organic Rankine cycle (i-AC-ORC) system which combines a vapour compression cycle and an organic Rankine cycle is proposed. An organic Rankine cycle system is applied to recover the waste heat rejected by the condenser of air-conditioning system. The selection of optimal fluid pairfor the air-conditioning subsystem and organic Rankine cycle subsystem is investigated. Based on thermodynamic (energy and exergy) and thermo-economic analysis, R600a-R123 is chosen as the fluid pair for this integrated air-conditioning-organic Rankine cycle system. The thermodynamic model has been programmed using Engineering Equation Solver (EES). The combined coefficient of performance (COP) of integrated system can be improved from 3.10 to 3.54 compared with that of the standalone air-conditioning subsystem. The organic Rankine cycle subsystem can yield1.41 kW of net electricity with a thermal efficiency of 3.05%. The organic Rankine cycle subsystem operates with an exergy efficiency of 39.30%. In addition, energetic and exergetic performances of the integrated system are studied with variable external conditions.
Original languageEnglish
Pages (from-to)192-198
Number of pages7
JournalEnergy Procedia
Publication statusPublished - 1 Jan 2017
Event1st Joint Conference on World Engineers Summit - Applied Energy Symposium and Forum: Low Carbon Cities and Urban Energy, WES-CUE 2017 - Singapore, Singapore
Duration: 19 Jul 201721 Jul 2017


  • Air conditioning
  • Organic Rankine cycle
  • thermo-economic analysis
  • Thermodynamic
  • Vapor compression cycle
  • Waste heat recovery
  • Working fluid

ASJC Scopus subject areas

  • Energy(all)

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