Calculation Of Surface Area Of Heatsink

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.

Calculation of surface area of heatsink. S tot total surface area. However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow. Total sa a 2 2a a 2 2 h2. Given height h and edge length a the surface area can be calculated using the following equations.

Check out the heatsinkcalculator if you need to evaluate these smaller heat sources. Typical values are listed in the article the importance of radiation in heat sink design. Lateral sa 2a a 2 2 h2. This calculator should not be used in instances where the heat source is much smaller than the base of the heat sink.

S slant height. Base sa a 2. Any heat sink with a larger value of h x a will be able to produce a lower source temperature. The variables ε is the surface emissivity of the heat sink.

Heat transfer by convection of a heat sink with fins calculator and equations. Concentration of the heat source over an area much smaller than heat sink base is not taken into account in this calculator. S lat lateral surface area. 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.

2 u channel interior surface identification 4. It is assumed that all surfaces of the heat sink are gray and. The stefan boltzmann constant σ has a value of 5 67 10 8 w m 2 k 4. Krug december 2015.

The heat transferred from the junction to case multiplied by the junction case. Please use our online heat sink calculator for this step. Fins are used to increase heat transfer area and provide a cooling effect. Applications of a heat sink calculator.

Heat sink sizing calculator v4. 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. The highest operating temperature that a semiconductor in an electronic device can withstand is called its junction temperature. E lateral edge length.

Plate fin heat sink attached to a printed circuit board continue. The metal surface is supposed to be untreated shiny metal colour and the thickness should exceed 1 5 mm. Heat sink design and optimization i. The p rocedure for calculating the radiative heat transfer coefficient for the u channels is outlined in the book by ellison ref.

H air film convective coefficient a exposed surface area of the fins. A side length. Estimate the overall volume of the heat sink required to cool a heat source by using the following equation. Heat sink sizing calculator rough estimate.