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A novel method for estimation of the annual energy assessment of using an external subcooler in a refrigeration machine.

Number: 0788

Author(s) : DIEM M., WICK L., STAHEL C. , TILLENKAMP F.

Summary

The additional subcooling of the refrigerant is an interesting way to improve the efficiency of the refrigerant system. On behalf of the Swiss Federal Office of Energy, the seasonal saving potential of using an external subcooler in a refrigeration machine considering application limits and plant specific conditions was investigated based on computer simulations.
The result of the investigation is presented as a guideline. With this method, a user can determine the optimum subcooling for his application with the given environmental conditions. By considering the operating limits of the refrigeration machine and the environmental conditions, the method can be used directly for the planning and adjustment of a refrigeration machine.
The results show that a refrigeration machine for air conditioning with a direct evaporator and the refrigerant R290 (propane) can significantly improve efficiency by using an external subcooler. There is an annual energy saving potential of 7% if the external subcooler is used with cold wastewater.

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Pages: 12 p.

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Details

  • Original title: A novel method for estimation of the annual energy assessment of using an external subcooler in a refrigeration machine.
  • Record ID : 30033501
  • Languages: English
  • Subject: Technology
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05

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