Case Studies

Natural Convection Cooling

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.

High Power Density Heat Sink Assemblies

Noren pioneers in providing solutions for efficient high power heat dissipation, high heat flux, heat spreading and other high heat management problems.

IGBT modules are one of the applications where Noren’s heat sink assemblies are designed for high power and lower overall thermal resistance.

Forced Convection Cooling

Design Analysis Forced convection is a type of heat transfer in which an external source (like a fan etc) is used to generate fluid motion and increase the heat transfer.

The most common perception is that higher the flow, higher the forced convection, therefore higher the cooling. This is not true because there many of other parameters which determine the amount of forced convection other than the CFM of the fan. One important parameter is the pressure drop across the heat sink. The greater the pressure drop across the heat sink, the lower the flow rate for the same fan, therefore the lower the forced convection. Therefore, the design of a heat sink is not as straight-forward as it appears to be.

At Noren we help you design the most efficient heat sink for your application to maximize the heat dissipated for the same.