Підвищення енергетичної ефективності абсорбційних холодильних приладів.

One of the ways to increase energy efficiency in refrigeration is to intensify the processes of convective heat transfer on the outer surfaces of the heat-dissipating elements of a refrigeration machine or unit. The maximum effect of the intensification of the processes of external convective heat transfer takes place in the absorption refrigeration unit (ARU). In the absorber, the supercooling of the water-ammonia solution, increased cleaning and lowering the temperature of the vapor-gas mixture entering the ARU evaporator is carried out, and in the condenser, liquid ammonia is supercooled at the inlet to the ARU evaporator. The intensification of convective heat transfer was carried out by installing a removable casing on the rear wall of the refrigerator. The casing allows you to organize a warm air vertical column and increase the speed of the air flow in the area where the heat-dissipating elements of the ARU are located. Taking into account the complexity of mathematical modeling of natural convection processes on ARU elements, experimental studies were carried out. The object of experimental research was the absorption refrigeration device "Crystal" produced by the Vasil’kovsky Refrigerator Plant. The refrigerating appliance contains a low-temperature compartment (LTC) with a volume of 11 dm³ and a refrigerating chamber (RC) with a volume of 144 dm^{3 .} In the process of experimental studies, a decrease in the daily energy consumption of ARU was recorded by 7,6 % (casing width 150 mm) and by 21 % (casing width 170 mm). The results of the experimental studies of intensifying methods made it possible to develop new designs of a combined household appliance – an absorption refrigeration appliance with a heating chamber. The heat load was supplied from the reflux condenser to the heating chamber using a two-phase thermosyphon. Tests have shown that in the mode of compensation of heat losses of the heating chamber to the environment, the daily energy consumption of ARU for 6 hours and 12 hours of operation was 1.536 kWh and 1.564 kWh, respectively, i.e. did not exceed 1.65 kWh according to the regulatory document. [ABSTRACT FROM AUTHOR]