"24V DC Cooling Fan" by the second law of thermodynamics shows that, as long as the temperature difference exists, the heat will pass spontaneously from a hot object to a cold objects, heat exchange. There are three modes of heat exchange: conduction, convection, radiation. Most of the power on the issue in terms of heat conduction and convection are the main cooling mode. But in fact in any thermal analysis problem, the three models exist to varying degrees, following analysis of these three modes of heat exchange.
1. "24V DC Cooling Fan" refers to the heat conduction through direct contact with body mass from high end to low end. It is the most effective way junction to case and the housing to the radiator power semiconductor devices. In pure conduction, heat and temperature relationship for
2. "24V DC Cooling Fan" convection hot air convection is due to the heat generation density is lower than its surrounding vicinity of cold air density, and therefore naturally form convection between the hot and cold air. Convective flow essentially is the use of gas or liquid flowing through the heat conductive surfaces remove heat. Newton thermal convection in line theorem.