Heat Sink Calculator Excel

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Heat sink calculator excel.

The flow between the fins of the heat sink will the modeled as internal fully developed flow. A fin n ed heat sink temperature distribution can be determined given heat sources. The heat sink size calculator first calculates the optimum spacing between the fins to achieve maximum convection cooling. The heat sink size calculator is based on a well established equation for estimating heat sink volume during the early stages of heat sink design.

The convection heat dissipation q c1 from area a 1 the external side surfaces of the heat sink shown figure 2 is first. Heat sink sizing calculations in order to calculate the heat transfer characteristics of the heat sink the convection coefficient h must be calculated. The maximum ambient temperature the device s junction to package thermal resistance the thermal resistance of the heat sink and the power applied. Heat transfer by convection of a heat sink with fins calculator and equations.

Heat sink convection with fins calculator. The heat source is assumed to cover the entire base of the heat sink. How does the heat sink calculator work. It has the following features.

This tool is designed to calculate junction temperature of an electronic device typically power devices given four parameters. Heat transfer design and engineering. The heat sink calculator is easy to use enter the parameters except the one you want to calculate and then press calculate see example below.

The heat sink calculator is very useful when you are choosing power transistors heat sink etc. The the width w of the heat sink spacing between the fins s and number of fins n will then be calculated for the selected values of l and h. In our experience it generally estimates the overall heat sink volume within 15 of a final design. Calculate the thermal resistance and pressure drop of a plate fin heat sink and study how individual parameters affect the heat sink performance.

However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow. Fin spacing height and thickness. Fins are used to increase heat transfer area and provide a cooling effect. The width of the heat sink is then calculated based on the number of fins required to dissipate the heat from the heat sink.

A reference link has been placed below the calculator for further reading. Values for l and h are first chosen based on your heat sink design constraints.