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Experimental study of steam-driven ejector heat pump.

Number: 0938

Author(s) : SPITZENBERGER J., MOHAMMED R. H., WANG P., MA H., ABU-HEIBA A., KOWALSKI S., NAWAZ K.

Summary

Ejector-driven systems have been shown to be promising for heating applications. Most of the research works have been devoted to cooling purposes, while little attention has been focused on heating applications. An experimental steam ejector heat pump system (EHP) was designed and constructed to assess its applicability to water heating applications. The effect of the primary nozzle exit position (NXP) on the performance of the steam ejector system was investigated for a primary nozzle throat diameters of 1.5 mm and 2.0 mm. The ejector system was run for high-temperature evaporator (HTE) temperatures of 120, 130, and 140 °C and lowtemperature evaporator (LTE) temperatures of 10, 15 and 20 °C. The target of this investigation was to attain the highest condensing temperature to be able to use the proposed system for water heating purposes. The ejector heat pump coefficient of performance (EHP COP) was used to determine the system efficiency. Larger LTE temperatures were found to result in higher EHP COPs and condensing temperatures. A maximum EHP COP of 2.02 was attained for a HTE and LTE temperatures 120 °C and 20 °C, respectively, however only resulted in a condensing temperature of 22.88 °C. Higher HTE temperatures were found to result in higher condensing temperatures, but at the cost of EHP COP. 

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Pages: 10 p.

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Details

  • Original title: Experimental study of steam-driven ejector heat pump.
  • Record ID : 30033519
  • Languages: English
  • Subject: Environment
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05

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