METHOD FOR REDUCING FROST FORMATION IN A RECUPERATIVE HEAT EXCHANGER

摘要

The invention is related to the field of heat exchange, in particular, to utilization of heat of ventilation emissions in heat-exchange systems using a hot humid gaseous heat-carrier and a cold heat-carrier having a temperature lower than 0°C. A method for reducing frost formation in a recuperative heat exchanger is disclosed, in accordance with which, for decreasing intensity of convective heat exchange between the cold heat-carrier and the heat-exchange surface and reducing formation of a laminar boundary layer on the initial section of length x, the heat-exchange partitions disposed in the initial section at a distance x from the inlet of the cold heat-carrier flow are put out of the heat-exchange process, and outlet of the hot heat-carrier from the heat-exchange zone is provided upstream of the initial section, the initial section length x being limited by reduction of the mean convective heat-exchange coefficient in the direction of the cold heat-carrier flow to a value 1.5-2 times higher than the mean convective heat-exchange coefficient in the remaining part of the length of the heat-exchange plates.