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- W2948447652 abstract "The paper presents information on the prospects for the use of nanoparticles to improve the thermotechnical characteristics of heat exchangers of the refrigerator operating on isobutane. The effect of nano additives is considered on the example of an experimental study of an evaporator. The object of research is the refrigerator’s evaporator, working as part of the calorimetric stand. The parameters to which attention was paid in the experiment were the heat transfer coefficient and the heat loss coefficient. One of the most problematic places is the use of model manometers and thermometers, which required manual data removal. The problem can be solved by replacing analog devices with digital ones with constant parameter removal and automatic recording and processing by computer. It also took a long time to establish the regime. During the study, data were obtained that when using nanofluids as a working medium, it is possible to increase the heat transfer coefficient by 21 % at a mode with a boiling point of –20 °C and a condensation temperature of 40 °C and also by 18.1 % at the mode with boiling point –15 °С. The heat loss coefficient in the evaporator can be increased to 7.5 %. This is due to the fact that the proposed method of introducing impurities of titanium oxide into the working fluid of the refrigerator leads to an increase in thermal conductivity, and hence to an improvement in heat transfer in heat exchangers. The use of nanofluids makes it possible to significantly increase the heat and mass transfer characteristics of the refrigerant, as compared with the means that require structural changes in the refrigerator circuit, to reduce temperature differences on the surfaces of the condenser and evaporator. And as a result, to reduce the ratio of boiling and condensing pressures, and, consequently, the electric power consumed by the refrigerator without adding additional elements to the apparatus. The industries of rational use of these additives are enterprises and the production of low-capacity refrigerators, including household appliances." @default.
- W2948447652 created "2019-06-14" @default.
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- W2948447652 date "2018-12-31" @default.
- W2948447652 modified "2023-10-18" @default.
- W2948447652 title "Improvement of thermotechnical properties of refrigerator’s evaporator using nanoparticles" @default.
- W2948447652 doi "https://doi.org/10.15587/2312-8372.2019.167453" @default.
- W2948447652 hasPublicationYear "2018" @default.
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