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Investigation of a heat pump dishwasher with Natural Refrigerant Mixture.

Number: 0926

Author(s) : STOECKEL K., MICKOLEIT E., BUSHING F., BARTA R. B., THOMAS C.

Summary

In this investigated domestic dishwasher a basic heat pump cycle functions as heating source to achieve energy saving. To ensure resource-efficient performance, the working fluid needs to have a global warming potential (GWP) below 150, be non-toxic and have a high coefficient of performance (COP) within the system. For the working fluid screening propane (R290) is chosen as a reference refrigerant. Besides pure refrigerants, zeotropic blends with adapted temperature glides are of particular relevance for energy optimization. In this investigation, the predictive screening for a low-temperature glide blend resulted in a composition of isobutane (R600a) and dimethyl ether (DME, RE170) with a molar ratio of 0.06 to 0.94 (GWP = 1.15). An energy saving of up to 24.8 % comparing propane with the adapted zeotropic blend and an increase of the COP up to 171 % compared to the pure electrical heating system could be achieved.

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Pages: 11 p.

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Details

  • Original title: Investigation of a heat pump dishwasher with Natural Refrigerant Mixture.
  • Record ID : 30031684
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0926

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