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<p>The multifuel research engine is investigated with diesel, petrol and biofuel to yield the engine waste heat temperature and flow rate of the fuel. The engine’s waste heat is used to generate power, cooling and water heating. The single-component working fluid is considered for the investigation of the integrated system. Three different working fluids M-Xylene, O-Xylene and Ethyl Benzene have been considered. Integrated power, refrigeration and district water heating systems have been considered in the present investigation. The energy and exergy assessments are performed through Engineering Equation Solver (EES). The optimum value of exergy efficiency is resulted for O-xylene, M-xylene and ethylbenzene as 48.34%, 47.4% and 46.8%, respectively, for biofuel. The integrated ORC-VCR system results in lower irreversibilities among the components due to its design. As due to a reduction in irreversibility, the waste heat resulting from the engine exhaust is converted more efficiently to work, thus resulting in a higher amount of energy efficiency of the system and COP.</p>

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Second law investigation on an integrated power, cooling and district water heating system

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • D. Manivannan,
  • N. Shankar Ganesh,
  • A. R. Pradeep Kumar,
  • T. Srinivas

摘要

The multifuel research engine is investigated with diesel, petrol and biofuel to yield the engine waste heat temperature and flow rate of the fuel. The engine’s waste heat is used to generate power, cooling and water heating. The single-component working fluid is considered for the investigation of the integrated system. Three different working fluids M-Xylene, O-Xylene and Ethyl Benzene have been considered. Integrated power, refrigeration and district water heating systems have been considered in the present investigation. The energy and exergy assessments are performed through Engineering Equation Solver (EES). The optimum value of exergy efficiency is resulted for O-xylene, M-xylene and ethylbenzene as 48.34%, 47.4% and 46.8%, respectively, for biofuel. The integrated ORC-VCR system results in lower irreversibilities among the components due to its design. As due to a reduction in irreversibility, the waste heat resulting from the engine exhaust is converted more efficiently to work, thus resulting in a higher amount of energy efficiency of the system and COP.