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Performance investigation on novel combined power generation and refrigeration system

Author

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  • G Uma Maheswari
  • N Shankar Ganesh
  • Tangellapalli Srinivas
  • Bale Viswanadha Reddy

Abstract

This article aims to examine a novel combined power and refrigeration system, using renewable and waste heat sources suitable for low-temperature applications. The present system is an integrated Kalina cycle and ejector refrigeration system to generate power and refrigeration simultaneously. To improve the vapour generation, the separator vapour fraction is used as a decision variable. Relative irreversibility and efficiency defect as two important parameters considered in this system for an investigation to identify the weaker components. The combined system generates power and refrigeration with two different mediums by the incorporation of the heat exchanger at the turbine exhaust. The novel system's energy and conventional exergy evaluation are carried out through Python Software. The optimum values of decision variables: turbine concentration, separator vapour fraction, entrainment ratio, expander ratio, split ratio and turbine concentration are identified using Python software from an opted range of variables. The maximum value of net power output, first law efficiency for power generation system, combined system, second law efficiency for power generation system, combined system, refrigeration effect and coefficient of performance are obtained as 113 kW, 8.85%, 11.83%, 93.44%, 81.29%, 38.07% and 0.118, respectively, at higher separator vapour fraction. Among the components considered in the combined power generation system, the condenser and LTRGN account for the higher exergy destruction rate of 30.41% and 25.53%. The coefficient of performance is maximized at a higher value of the refrigeration effect. The turbine pressure at the inlet is increased with increments in turbine work on choosing the higher value of the expander ratio. The higher exergetic value components are not emphasized to focus on improvement.

Suggested Citation

  • G Uma Maheswari & N Shankar Ganesh & Tangellapalli Srinivas & Bale Viswanadha Reddy, 2024. "Performance investigation on novel combined power generation and refrigeration system," Energy & Environment, , vol. 35(6), pages 2935-2958, September.
    • Handle: RePEc:sae:engenv:v:35:y:2024:i:6:p:2935-2958
    DOI: 10.1177/0958305X231159448
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    References listed on IDEAS

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