To estimation of elements cooling efficiency in a hydraulic drive with an irrigation device
The construction of a heat exchanger consisting of upper and lower collectors, interconnected by heat exchange tubes, and a fan operating in an automatic mode, is proposed. For more efficient heat dissipation the device is equipped with an additional system of external water irrigation. To assess the effect of the structural parameters of the heat exchanger on the cooling fluid cooling intensity, a mathematical model is formed. The structure of the mathematical model takes into account the heat transfer on the inner surface of the tube, the heat transfer from the working fluid to the wall, the heat transfer from bundles of finned tubes during blowing, and heat transfer on the outer surface of the finned tube due to irrigation. Hydraulic drive parameters are considered to be concentrated, and numerical characteristics of the parameters - as averaged over spatial coordinates. It is shown that when the heat exchange surface is irrigated with water, the temperature of the cooled liquid at the outlet from the heat exchanger is reduced by 10-20 °C in comparison with the "dry" method.