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Exergy, environmental, and economic analyses of solar-powered dedicated mechanical subcooling refrigeration in hot climates.

Number: 2353

Author(s) : GUEDOUAR A., BAHMAN A. M., IBRAHIM O. M.

Summary

This paper investigates the integration of a solar-powered dedicated mechanical subcooling (SDMS) cycle into the basic vapor compression cycle (VCC), as proposed and energy-assessed by Barghash et al. (2021). The primary advantage lies in enhancing refrigerant by further subcooling through an internal heat exchanger (IHX), thus increasing cooling capacity and utilizing solar energy to power the secondary compressor, leading to utility energy savings. This paper aims to further analyze the modified SDMS cycle by conducting exergy, environmental, and economic (3E) analyses for a case study of hot climates such as Kuwait. When comparing the SDMS system with the baseline VCC system, exergy analysis showed an enhancement of approximately 3% in exergy efficiency during the operational summer months of May, June, July, and August. Furthermore, from the exergy destruction perspective, SDMS reduced the exergy destruction by about 8% to 11% compared to VCC during the summers months. Environmental analysis, employing the Total Equivalent Warming Impact (TEWI) methodology, showed a 5% reduction in yearly equivalent carbon emissions despite a minor increase in direct emissions. Lastly, the economic analysis estimated a break-even period to be about 9 years between the SDMS and VCC systems.

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Pages: 10 p.

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  • Original title: Exergy, environmental, and economic analyses of solar-powered dedicated mechanical subcooling refrigeration in hot climates.
  • Record ID : 30033168
  • Languages: English
  • Subject: Environment
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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