Experimental study of a radial micro-channel cooling plate

The thermal behavior of a micro-channel cooling device has been investigated by using two different, complementary measurement methods. The measured sample was a square nickel plate micro-cooler holding 128 micro-channels in radial arrangement. In our previous studies we used only thermal transient measurements and the structure functions method to identify the partial thermal resistance corresponding to the cooler. In the current study the measurement setup was completed by a heat-flux sensor array placed under the micro-cooler. This way we could compare the heat-transfer coefficient values obtained: (1) from the identified thermal resistance value; and (2) calculated directly from the measured heat-flux values. Good matching of the values obtained the different methods was found