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  • Open Access


    Analysis of a Water-Cooled Unit under Different Loads

    Daoming Shen1,*, Jinhong Xia1, Chao Gui1, Songtao Xue2

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1863-1873, 2023, DOI:10.32604/fdmp.2023.024925

    Abstract In order to ensure the safe operation of the compressors used in water chillers, in the present study some interlock protections have been added to the related design. These include a low pressure protection, a high pressure protection, an exhaust temperature protection and a differential pressure protection. Some tests have been conducted by tuning the saturation suction and exhaust temperatures of the compressor through adjustment of the cold source outlet temperature and the ambient temperature. The results show that the ambient temperature increases with decreasing device load and increasing fan speed under the same saturated More > Graphic Abstract

    Analysis of a Water-Cooled Unit under Different Loads

  • Open Access

    Experimental Analysis of the Performances of Unit Refrigeration Systems Based on Parallel Compressors with Consideration of the Volumetric and Isentropic Efficiency

    Daoming Shen1,2,*, Chao Gui1, Jinhong Xia1, Songtao Xue2,3

    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 489-500, 2020, DOI:10.32604/fdmp.2020.08969

    Abstract The performances of a refrigeration unit relying on compressors working in parallel have been investigated considering the influence of the compressor volumetric efficiency and isentropic efficiency on the compression ratio. Moreover, the following influential factors have been taken into account: evaporation temperature, condensation temperature and compressor suction-exhaust pressure ratio for different opening conditions of the compressor. The following quantities have been selected as the unit performance measurement indicators: refrigeration capacity, energy efficiency ratio (COP), compressor power consumption, and refrigerant flow rate. The experimental results indicate that the system refrigeration capacity and COP decrease with a More >

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