Calculation Of Surface Area Of Heatsink

Typical values are listed in the article the importance of radiation in heat sink design.

Calculation of surface area of heatsink.

Fins are used to increase heat transfer area and provide a cooling effect. S slant height. Heat sink sizing calculator rough estimate. Concentration of the heat source over an area much smaller than heat sink base is not taken into account in this calculator.

The surface area of a square pyramid is comprised of the area of its square base and the area of each of its four triangular faces. Any heat sink with a larger value of h x a will be able to produce a lower source temperature. This temperature is commonly higher than the temperature of the device s exterior and its case. H air film convective coefficient a exposed surface area of the fins.

Heat sink design and optimization i. Plate fin heat sink attached to a printed circuit board continue. Heat transfer by convection of a heat sink with fins calculator and equations. S tot total surface area.

A side length. Is the convection coefficient of the heat sink is the total surface area of the heat sink is the temperature of the source being cooled is the ambient temperature. Applications of a heat sink calculator. E lateral edge length.

Check out the heatsinkcalculator if you need to evaluate these smaller heat sources. S lat lateral surface area. The heat transferred from the junction to case multiplied by the junction case. However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow.

The stefan boltzmann constant σ has a value of 5 67 10 8 w m 2 k 4. The variables ε is the surface emissivity of the heat sink. 2 u channel interior surface identification 4. This calculator should not be used in instances where the heat source is much smaller than the base of the heat sink.

Base sa a 2. Krug december 2015. Total sa a 2 2a a 2 2 h2. Lateral sa 2a a 2 2 h2.

Estimate the overall volume of the heat sink required to cool a heat source by using the following equation. Where a hs is the surface of the metal plate in cm 2 and r th hs a is the thermal resistance from the heat sink to the ambient in c w. The highest operating temperature that a semiconductor in an electronic device can withstand is called its junction temperature. Please use our online heat sink calculator for this step.

It is assumed that all surfaces of the heat sink are gray and. Next the radiation heat transfer from the area a 2 given by equation 10 is calculated. P perimeter of the fins. Heat sink sizing calculator v4.