International Scientific Journal


Fossil resources are largely used for energy supply. This situation causes environ­mental pollution. In recent years, studies in the field of more environmentally friend­ly and sustainable energy conversion technologies have increased. In this context, organic Rankine cycle (ORC) technology is combined with RES. In this study, combined ORC and vapor compression cycle (VCC) were investigated. The electricity produced in the combined ORC-VCC system was used both in the compressor of the VCC system and in the plant. The main factor affecting the efficiency of the combined ORC-VCC system is the refrigerant. Therefore, it is necessary to examine the selection of the most suitable refrigerant for an ORC-VCC based system. Fifteen different refrigerants were optimized with the enginering equation solver program, and energy and exergy analyzes of the systems were made separately. According to the results, the best energy efficiency and COP values among the refrigerants was found to be R40 (ηORC = 0.1206) for the ORC system and R113 (COP = 4.405) for the VCC system. For all system components in the VCC, the most exergy destruction occurs in the evaporator, followed by the compressor, condenser, and throttle, respectively. In ORC, the most exergy destruction is in the evaporator, followed by the condenser, tube and pump, respectively. The total efficiency was found to be (β = 0.53) for the combined ORC-VCC system. The total exergetic efficiency was found to be (ψglob = 0.26) for the combined ORC-VCC system.
PAPER REVISED: 2021-11-11
PAPER ACCEPTED: 2022-04-15
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THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 4, PAGES [2855 - 2863]
  1. Ozer, et al., Effects of Liquefed Petroleum Gas use in a Turbocharged Stratified Injection Engine Using Ethanol/Gasoline as Pilot Fuel, Thermal Science, Thermal Science, 25 (2021), Special Issue 1, pp. 89-99
  2. Saha, B. K., Chakraborty, B., Utilization of Low-Grade Waste Heat-to-Energy Technologies and Policy in Indian Industrial Sector: A Review, Clean Techn. Environ Policy, 19 (2017), July, pp. 327-347
  3. Khatoon, S., et al., Thermodynamic Study of a Combined Power and Refrigeration System for Low-Grade Heat Energy Source, Energies, 14 (2021), 2, 410
  4. Toujani, N., et al., The Impact of Operating Parameters on the Performance of a New ORC-VCC Combination for Cogeneration, Thermal Engineering, 67 (2020), 9, pp. 660-672
  5. Hernandez-Fernandez, N. J., et al., Simulation of Operating Conditions and Working Fluids for Organic Rankine Cycles, Rev. Investig. Desarro. Innov., 10 (2020), 2, pp. 349-358
  6. Yousefizadeh Dibazar, S., et al., Comparison of Exergy and Advanced Exergy Analysis in Three Different Organic Rankine Cycles, Processes, 8 (2020), 5, 586
  7. Lecompte, S., et al., Exergy Analysis of Zeotropic Mixtures as Working Fluids in Organic Rankine Cycles, Energy Conversion and Management, 85 (2014), Sept., pp. 727-739
  8. Saleh, B., Parametric and Working Fluid Analysis of a Combined Organic Rankine-Vapor Compression Refrigeration System Activated by Low-Grade Thermal Energy, Journal of Advanced Research, 7 (2016), 5, pp. 651-660
  9. Liang, Y., et al., A Waste Heat-Driven Cooling System Based on Combined Organic Rankine and Vapour Compression Refrigeration Cycles, Appl. Sci., 9 (2019), 4242
  10. Jeong, J., Kang, Y. T., Analysis of a Refrigeration Cycle Driven by Refrigerant Steam Turbine, International Journal of Refrigeration, 27 (2004), 1, pp. 33-41
  11. Pektezel, O., Acar, H. İ., Еnergy and Exergy Analysis of Combined Organic Rankine Cycle-Single and Dual Evaporator Vapor Compression Refrigeration Cycle, Appl. Sci., 9 (2019), 23, 5028
  12. ***,
  13. Cengel, Y. A., Boles, M. B., Thermodinamics: An Engineering Approach, McGraw-Hill, New York, USA, 2011
  14. Dincer, I., Rosen, M. A., Exergy: Energy, Environment and Sustainable Development, Elsevier Science, New York, USA, 2012
  15. Nabati, A., Use of Solar Radiation Produce Cold Water for Hospital Air Conditionin System Using the Combined Organic Rankine-Vapor Compression Cycle, Energy Equpment and System, 9 (2001), 1, pp. 53-69
  16. Klein, S. A., Engineering Equation Solver (EES), F-CHARTSoftware, Version 10.835-3D, 2020

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