Natural Convection Cooling

Natural Convection is a type of heat transfer which occurs only due to density differences in the fluid due to temperature gradients. In natural convection, fluid surrounding a heat source receives heat, becomes less dense and rises up. The surrounding, fluid then moves to replace it. This cooler fluid is then heated and the process continues, forming convection current. Since there is no external fan to accelerate the heat transfer, the design of the heat sink should be thermally efficient to dissipate maximum amount of heat.

This type of cooling is employed when forced convection cannot be used in the system because of space constraints, power limitations, noise etc. 

CPV Heat Sink Assembly

Thermal Analysis results of CPV HEat Sink Assembly

Street Lighting Cooling System

Fluid Flow in Natural Convection