Example: Temperature Change Material Variation

A heat exchanger device (A) cools the liquid refrigerant in a cold plate (B). The cold plates controls the temperature within an electronics module. We use Temperature Change because the cold plate maintains a known temperature drop within the working fluid.

System settings:

1. Flow Variation method = Constant. Flow rate = 0.1 gal/min.
2. Heat Transfer Variation method = Temperature Change
3. Temperature Change = -1°C (A negative value means the heat exchanger cools the working fluid.)

The value of Temperature Change came from the manufacturer-supplied thermal characteristics of the cold plate:

• The area of the cold plate surface is 18 in².
• The electronics module dissipates 15 W.
• At a flow rate of 0.1 gal/min, the thermal resistance of the specific cold plate model is approximately 1.24 °C in² / W.
• The heat exchanger device must deliver a temperature change of 1 °C to simulate the effect of the cold plate.