Improvement of design of water evaporative air coolers in tractor cabins

Abstract

For mobile objects, at the moment, foreign companies supply for Russia a wide range of air conditioning devices based in on the refrigerant refrigerant (freon) refrigerators. They are designed for use in fundamentally different from our climatic conditions, characterized by a relatively short warm period of the year, which should be taken into account when choosing the operating modes and composition of the functional parts of air conditioning units. Two variants of the design of two-stage water-evaporative air coolers made according to a separate scheme are proposed, where as a first (main) unit intended for air conditioning, a block is used that contains a successively placed water-air heat exchanger and a water-sprayed nozzle, and as a second (auxiliary) unit, intended for the preparation of cold water supplied to said water-air heat exchanger of the first unit, a cooling tower is used, containing in one variant irrigated only nozzle, and in the second variant - unit, similar to the air conditioning unit. Comparison of the IKPV and IRKV with the pilot KPO and RKV (T02), as well as with the coolant conditioner, shows that they are almost as cool as the experimental ones, having a significantly lower mass at acceptable overall dimensions of the roof unit and have the possibility of additional “wer” cleaning it from fine dust and gaseous impurities; basing the design of the proposed coolers on the units used in the normalization of the microclimate makes it possible to create, if necessary, the modification of IKPV and IRKV of various capacities; in the climatic conditions of Russia, which do not require dehumidification of conditioned air, innovative coolers are comparable by the condition of providing in the tractor cabs normalized parameters of the microclimate with refrigerant air conditioning devices, significantly exceeding them in terms of energy saving. Their introduction in areas with dry hot climate can make an alternative to cold-air conditioners, which they significantly exceed in terms of energy saving.