Influence of radiator fin temperature

According to the theory of convection heat transfer, the temperature of the external environment has an important influence on the heat dissipation of the fins of the LED radiator. For the same heating body, the higher the external temperature, the weaker the convection exchange and the more difficult it is to dissipate heat; The lower the outside temperature, the better the convection exchange and the easier the heat dissipation.

In addition, according to the heat dissipation path of the LED radiator, the heat generated by the Shandong vacuum pump LED during the use process is eventually dissipated into the air by the radiator in natural convection. The air between the radiator fins is affected by this heat, and the temperature will be Has increased. Therefore, it is necessary to study the more reasonable and accurate treatment of the boundary conditions of environmental temperature changes.

For a natural convection radiator, the cooling effect of Changzhou vacuum pump depends not only on the thermal conductivity of the radiator (to ensure that the heat from the heat source is quickly transferred out), but also on the heat exchange between the radiator and the surrounding air (otherwise Heat sink).

During the operation of the radiator, the temperature of the air between the fins changes due to the convection heat exchange between the fins and the air. From the initial average ambient temperature to a certain temperature, the dynamic equilibrium is finally reached.

For natural convection heat transfer, the temperature of the air between the fins is greater than the average of the initial ambient temperature after the temperature change of the radiator reaches the dynamic equilibrium, and its distribution is spatially variable. Obviously, the conventional heat transfer calculation model does not consider the change in air temperature between the fins during heat dissipation, so the calculation result is relatively low compared to the actual situation.

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