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Thermodynamic and economic analysis of a novel dual-pressure organic rankine cycle coupled two-stage vapor compression heat pump system.

Type of article: IJR article

Summary

Based on the demand for waste heat recovery and steam heating in the medicine, steel and textile fields, a novel series double-pressure organic Rankine cycle coupled two-stage vapor compression heat pump system driven by low temperature waste heat is proposed. The economic feasibility and thermodynamic superiority of the system are demonstrated by contrasting its thermodynamic and economic performance with that of the conventional single-stage organic Rankine cycle-vapor compression heat pump system. Then, a sensitivity analysis is conducted to assess the impact of temperature parameters on the system performance. Finally, the comprehensive performance of six candidate working mediums is evaluated using the grey relational analysis and entropy weight method. The findings indicate that the system coefficient of performance (COPs), exergy efficiency and net present value of the two-stage composite system are increased by 9.3 %, 5 % and 9.6 % respectively compared to the single-stage composite system, and the investment payback period is shortened by 8.3 %. Sensitivity analyses show that the thermodynamic and economic indicators exhibit contrasting trends in response to changes in temperature parameters. Under all evaluated heat source temperatures, Hydrocarbons (HCs) exhibit elevated gray relational degrees, indicating superior overall performance.

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Pages: 240-255

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Details

  • Original title: Thermodynamic and economic analysis of a novel dual-pressure organic rankine cycle coupled two-stage vapor compression heat pump system.
  • Record ID : 30033661
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 172
  • Publication date: 2025/04
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2025.01.024

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