1. The thermoelectric cooler assembly was attached to the various sizes of the aluminum in turn using the heat sink paste.
  2. The current was then fixed at 1.0 A and passed through the thermoelectric cooler assembly.
  3. The temperature of the cold surface of the thermoelectric cooler assembly was then measured three minutes after the current had been switched on for all the sizes of the aluminum.
  4. The heat sink and thermoelectric cooler assembly were at room temperature before the current was switched on.