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ISSN: 2300-5599

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Research and Innovation Centre
Pro-Akademia 9/11 Innowacyjna Street
95-050 Konstantynów Łódzki Poland

 

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44_3

Thermodynamic analysis of combined ORC-VCR system with recuperator and reheater

Article history: Received 31 March 2022, Received in revised form 3 April 2022, Accepted 4 May 2022, Available online 4 May 2022

pages: 34-44


Authors

Kamal Singh Rawat, Prabhakar Bhandari, Vijay Singh Bisht


Abstract

The trend of utilization of low-grade thermal energy gain huge attention due to increase in energy demand and depletion of conventional resources of energy. Low grade energy can be used in ORC-VCR cycle for refrigeration purpose. In the present work, to improve the performance a modified ORC-VCR cycle, recuperator and reheater are integrated in the cycle. The thermodynamic analysis of the modified system has been conducted with R600a, R600, R290 and R1270 as working fluids under various operating conditions viz. evaporator temperature, condenser temperature, boiler exit temperature. Different parameters evaluated to assess the performance are overall COP, mass flow rate per kW cooling capacity, expansion ratio and compression ratio. From the analysis, butane is found as a best choice for the modified ORC–VCR cycle. It was found that for the modified ORC-VCR cycle at boiler exit temperature of 90°C and condenser temperature 40°C has system COP of 0.5542 with butane, which is 7.1% and 18% higher than that of ORC-VCR cycle with recuperator and simple ORC-VCR cycle, respectively.

DOI: https://doi.org/10.32933/ActaInnovations.44.3


Keywords

low grade energy; organic rankine cycle; refrigeration; hydrocarbons; recuperator; reheater