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Research on waste heat recovery from gas engine for auxiliary heating: An emerging operation strategy to gas engine-driven heat pump.

Author(s) : ZHANG R., TIAN Z., LIU F., TIAN C., MA Z., JIA L.

Type of article: IJR article

Summary

Gas engine-driven heat pump (GEHP) is attracting increasing interest owing to the high heating efficiency and energy-saving. However, the waste heat from engine is mostly used to directly heat domestic hot water. In this study, a new type of waste heat utilization mode of GEHP was proposed: auxiliary heating. The heating capacity, gas consumption, waste heat recovery and compression ratio of water-source GEHP system with waste heat auxiliary heating mode was studied. In addition, the effects of two utilization modes of engine waste heat domestic hot water (mode Ⅰ) and auxiliary heating (mode Ⅱ) on the thermodynamic parameters were compared. The results indicated that the system efficiency was decrease with engine speed. Even in high speed operation, the primary energy efficiency (PER) of the system was more than 1.55. Under the same range of condenser water inlet temperature, the COP of mode Ⅰ was in the range of 4.71–4.95, and that of mode Ⅱ was in the range of 5.17–5.67. The energy saving and emission saving were also researched. Compared with mode Ⅰ, mode Ⅱ had higher efficiency and less pollution to the environment.

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Pages: 206-215

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Details

  • Original title: Research on waste heat recovery from gas engine for auxiliary heating: An emerging operation strategy to gas engine-driven heat pump.
  • Record ID : 30028027
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 121
  • Publication date: 2021/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.09.015

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