Abstract
The values of the optimal height of the ribs and the optimum pitch arrangement of ribs on the surface of the radiator were detected. Criterial dependences for calculation of heat transfer at the surface that is at an angle of 90 degrees to the horizon in the presence of rectangular bars with free air convection were obtained. In my research, an attempt is made to determine the values of the optimal height of the ribs and the optimal spacing of the ribs on the surface of the radiator, as well as to obtain empirical relations in a dimensionless form to calculate the local coefficient of convective heat transfer on the surface at an angle of 90 degrees to the horizon, under free air convection. It was possible to determine that the installation of rectangular rods with a step of 8.2 mm on the surface at an angle of 90 degrees to the horizon, leads to an increase in the local coefficient of convective heat transfer to 200% compared to the surface on which there are no rods. experimental work area , free- convection flow, heat transfer coefficient, radiator, heat carrier
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