Calculation Of Surface Area Of Heatsink

S lat lateral surface area.

Calculation of surface area of heatsink.

Fins are used to increase heat transfer area and provide a cooling effect. The variables ε is the surface emissivity of the heat sink. Typical values are listed in the article the importance of radiation in heat sink design. 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.

Lateral sa 2a a 2 2 h2. Next the radiation heat transfer from the area a 2 given by equation 10 is calculated. Please use our online heat sink calculator for this step. Applications of a heat sink calculator.

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. P perimeter of the fins. The p rocedure for calculating the radiative heat transfer coefficient for the u channels is outlined in the book by ellison ref. Concentration of the heat source over an area much smaller than heat sink base is not taken into account in this calculator.

The heat transferred from the junction to case multiplied by the junction case. Base sa a 2. Given height h and edge length a the surface area can be calculated using the following equations. This temperature is commonly higher than the temperature of the device s exterior and its case.

Total sa a 2 2a a 2 2 h2. The stefan boltzmann constant σ has a value of 5 67 10 8 w m 2 k 4. Heat sink sizing calculator rough estimate. A side length.

Heat sink sizing calculator v4. This calculator should not be used in instances where the heat source is much smaller than the base of the heat sink. The highest operating temperature that a semiconductor in an electronic device can withstand is called its junction temperature. 2 u channel interior surface identification 4.

Krug december 2015. Estimate the overall volume of the heat sink required to cool a heat source by using the following equation. 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. However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow.

Check out the heatsinkcalculator if you need to evaluate these smaller heat sources. Any heat sink with a larger value of h x a will be able to produce a lower source temperature. Heat sink design and optimization i. E lateral edge length.

The metal surface is supposed to be untreated shiny metal colour and the thickness should exceed 1 5 mm. Heat transfer by convection of a heat sink with fins calculator and equations. H air film convective coefficient a exposed surface area of the fins. S slant height.