Calculation Of Surface Area Of Heatsink

Please use our online heat sink calculator for this step.

Calculation of surface area of heatsink.

Heat sink design and optimization i. Heat sink sizing calculator rough estimate. Base sa a 2. Lateral sa 2a a 2 2 h2.

S lat lateral surface area. However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow. 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 metal surface is supposed to be untreated shiny metal colour and the thickness should exceed 1 5 mm.

2 u channel interior surface identification 4. It is assumed that all surfaces of the heat sink are gray and. The highest operating temperature that a semiconductor in an electronic device can withstand is called its junction temperature. Estimate the overall volume of the heat sink required to cool a heat source by using the following equation.

Concentration of the heat source over an area much smaller than heat sink base is not taken into account in this calculator. Given height h and edge length a the surface area can be calculated using the following equations. Applications of a heat sink calculator. Fins are used to increase heat transfer area and provide a cooling effect.

Check out the heatsinkcalculator if you need to evaluate these smaller heat sources. The heat transferred from the junction to case multiplied by the junction case. This temperature is commonly higher than the temperature of the device s exterior and its case. This calculator should not be used in instances where the heat source is much smaller than the base of the heat sink.

Plate fin heat sink attached to a printed circuit board continue. Total sa a 2 2a a 2 2 h2. E lateral edge length. The stefan boltzmann constant σ has a value of 5 67 10 8 w m 2 k 4.

A side length. 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. S slant height. 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.

Next the radiation heat transfer from the area a 2 given by equation 10 is calculated. Any heat sink with a larger value of h x a will be able to produce a lower source temperature. Krug december 2015. The variables ε is the surface emissivity of the heat sink.

Heat sink sizing calculator v4. H air film convective coefficient a exposed surface area of the fins. Heat transfer by convection of a heat sink with fins calculator and equations. S tot total surface area.