What affects Heat Transfer

      There are three basic ways of heat transfer: thermal conduction, thermal convection, and thermal radiation. According to the characteristics of the heat transfer medium, the process of heat transfer can be further divided into heat conduction, convective heat transfer, and radiative heat transfer.

Surface Texture (Rough) & Flatness (2 points) affects tolerance.

Manufacturing Process - Casting vs Extrusion / Stamping.

*Larger surface area magnifies the out of tolerance.

TIM Thickness mitigates the tolerance problem.

Application Environment: Vibration requires thicker material.

Electrical safety typically requires thicker material.

Compression Modulus – Softer material improves compliance and surface wetting, reducing Contact Resistance.

    In addition to the above factors, the heat transfer conditions also include the heat transfer method and time. The heat transfer methods include convective heat transfer, radiation heat transfer, and thermal conduction heat transfer. Different heat transfer methods also have different effects on heat transfer. Heat transfer time refers to the time required to transfer heat, and the longer the heat transfer time, the slower the heat transfer rate.
   In short, heat transfer conditions are an important factor affecting heat transfer efficiency, and efficient heat transfer can only be achieved under appropriate heat transfer conditions. Therefore, when designing heat transfer equipment, full consideration should be given to heat transfer conditions to improve heat transfer efficiency.