Experimental study of the cooling system of a domestic refrigerator

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Abstract

Results of experimental investigation of a two-compartment household refrigerator refrigeration systems on three refrigerants, two of which were zeotropic mixtures are presented. Three different circuits n refrigeration system were studied with these refrigerants. It is shown that use of a zeotropic mixture wilt considerable temperature glide of phase transitions as a refrigerant, will make it possible to considerably reduce energy consumption of household refrigerator.

About the authors

I. M. Kalnin

Moscow State University of Environmental Engineering

Author for correspondence.
Email: info@eco-vector.com

PhD in Engineering

Russian Federation, Moscow

K. N. Fadekov

NP SC "NASTKHOL"

Email: info@eco-vector.com
Russian Federation

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2. Fig. 1. Schematic diagram of the thermotechnical bench: 1 - compressor; 2 - wattmeter; 3, 5, 13 - heaters; 4 - evaporator of the refrigerating chamber; 6 - intermediate heat exchanger; 7 - evaporator of the freezing chamber; 8 - throttling valve; 9 - regenerative heat exchanger; 10 - filter-dryer; 11 - receiver; 12 - condenser; 14 - sight-glass

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3. Fig. 2. Cooling capacity Q0 of the cooling system: 1- R12; 2 - R22/R142b; 3 - R290/R600; — -experimental indices ; ---calculated indices (without taking into account hydro-resistances in apparatuses)

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4. Fig. 3. Relative pressure losses ∆¯p in the evaporator of the freezing chamber: 1 - R12; 2 - R22/R142b; 3 - R290/R600; — -T2 ; --- -T5

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5. Fig. 4. Refrigeration coefficients of є cooling system: 1 - R12; 2 - R22/R142b; 3 - R290/R600; — -experimental indices; --- - calculated indices (without taking into account hydro-resistances in units)

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6. Fig. 5. Experimental refrigeration coefficients ε of the cooling system: when operating on R290/R600: 1 - cycle T1; 2 - cycle T2; 3 - cycle T5; 4 - εT2/εT1; 5 - εT5/εT2; 6 - εT5/εT1

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Copyright (c) 2002 Kalnin I.M., Fadekov K.N.

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