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Optimization of water cooled low charge propane integral display cabinet with dedicated variable speed compressor solution.

Number: pap. n. 1872

Author(s) : HUCHTEMANN K., WINANDY E., BERTAGNOLIO S.

Summary

Within the scope of the F-gas regulation there is a trend towards future proof technologies using hydrocarbons, CO2 or other low GWP refrigerants. In supermarket refrigeration, the integral display case architecture is one of these technologies because it allows for using the flammable hydrocarbon propane (R290). The integral display case architecture consists of refrigerant circuits for each display case which reject heat to a water or brine loop. For the application with R290 it uses multiple circuit systems with low charge each (<150 g) to comply with international product standards (IEC60335-2-89). With safety regulations allowing for larger quantities of R290 per refrigerant circuit, it will be possible to use single circuit designs and therefore benefit from the variable speed compressor technology. The paper presents an integrated solution for water cooled integral display cases that supports manufacturers in dealing with the technical challenges associated with new refrigerants such as hydrocarbons and variable speed technology. The solution includes a variable speed scroll compressor designed for the use of R290, a variable frequency drive, electronic expansion valve, safety devices and a system controller. The focus is on the optimization of the system efficiency and control as well as the design for limited refrigerant charge.

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Pages: 8

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Details

  • Original title: Optimization of water cooled low charge propane integral display cabinet with dedicated variable speed compressor solution.
  • Record ID : 30026770
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1872
  • Notes:

    Keynote


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