Heat transfer using heat sinks

[george varkey]

I need help regarding a small project on thermoelectric refrigerator. I need to cool a 5.4 ltr capacity refrigerating space to maintain it at 10-12 degrees. I have the cooling module in place.I needed to dissipate 98 W of power from one module via a heat sink.

I have a heat sink that is of pin type measuring 96*96 mm with 98 pins of rectangular cross section.I need to find:

a) The thermal resistance of this heat sink when coupled with a cooling fan of 12.5W

b)how to choose a heat sink so that the temperature rise can be restricted to 20 degrees from the ambient temperature.

anyone having any idea in this topic please reply!

 

[Navin A S]

For question a), the thermal resistance of this heat sink when coupled with a cooling fan of 12.5W depends on several factors such as the size and type of fan, the material properties of the heat sink, the air flow rate, and the ambient temperature. To calculate the thermal resistance, you would need to use a thermal analysis tool such as COMSOL or ANSYS to simulate the system. For question b), you would need to use a thermal analysis tool to determine the required size and type of heat sink to restrict the temperature rise to 20 degrees from the ambient temperature. You would need to define the geometry of the heat sink, the material properties of the heat sink, the air flow rate, and the ambient temperature. You can then vary the parameters such as the size of the heat sink and the type of fan to find the optimal combination that meets your requirements.