"Tiny Cooling Fan" system cooling mode selection should take full account of the many factors that system heat power, temperature / volume / weight requirements, protection, cooling equipment operability, price, and ultimately select the most suitable products, effective heat dissipation. Cooling can be divided into: natural cooling, forced air cooling. Liquid cooling. Now widely used in cooling mode is still cooling. The following table reflects the relationship between heat flux and temperature at different "Tiny Cooling Fan" Cooling status. Natural Cooling: air natural convection heat to the surrounding space. This cooling method can not use the heating power, weight, temperature and other demanding applications. Advantages: simple structure, no noise, low prices. "Tiny Cooling Fan" forced air: heating power consumption devices, use forced air cooling is necessary, especially with some of the high-performance heat sink can achieve the desired effect. Forced air-cooled heat exchanger high efficiency, typically several times the natural heat dissipation. Advantages: High thermal efficiency, product weight can be significantly reduced.