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Research on a Solar Hybrid Trigeneration System Based on Exergy and Exergoenvironmental Assessments

Author

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  • Eduardo J. C. Cavalcanti

    (Department of Mechanical Engineering, Federal University of Rio Grande do Norte (UFRN), Natal 59072-970, Brazil)

  • João Victor M. Ferreira

    (Department of Mechanical Engineering, Federal University of Rio Grande do Norte (UFRN), Natal 59072-970, Brazil)

  • Monica Carvalho

    (Department of Renewable Energy Engineering, Federal University of Paraíba (UFPB), João Pessoa 58051-900, Brazil)

Abstract

The environmental performance of a combined cooling, heating, and power system is analyzed in this study at a component-level using a SPECO-based exergoenvironmental analysis. The engine consumes natural gas and produces 168.6 kW net power. The waste heat is recovered by a LiBr-H 2 O absorption chiller and a heat exchanger, which are used for cooling and heating purposes. The energy system is assisted by a solar field. An environmental Life Cycle Assessment quantifies the environmental impacts of the system, and these data are combined with exergy evaluations. The highest total environmental impact rate, 23,740.16 mPt/h, is related to the internal combustion engine, of which pollutant formation is the primary source of environmental impact. Compared with a non-renewable energy system, the solar-assisted trigeneration system decreased the environmental impact per exergy unit of chilled water by 10.99%. Exergoenvironmental performance can be further improved by enhancing the exergy efficiency of the solution pump and high-pressure generator (HG), and by employing a treatment to remove nitrogen oxides in the reciprocating engine.

Suggested Citation

  • Eduardo J. C. Cavalcanti & João Victor M. Ferreira & Monica Carvalho, 2021. "Research on a Solar Hybrid Trigeneration System Based on Exergy and Exergoenvironmental Assessments," Energies, MDPI, vol. 14(22), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7560-:d:677668
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    References listed on IDEAS

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