Heat-leakage of Peltier current lead (PCL) with natural and water-cooling modes at its room-temperature terminals was simulated by finite element method (FEM). A twodimensional model of PCL with conduction cooling was established to obtain optimized parameters for natural air cooling (NAC) and water cooling (WC) at room-temperature terminals. Simulated results show that the minimum heat leakage is available at low current if the room-temperature termination is cooled by NAC and the minimum heat leakage easily obtains at high current if it is cooled by water.
Experimental study on Peltier current leads (PCLs) with natural air cooling (NAC) applied to hot ends of Bi 2 Te 3 at 77 K is presented in this paper. Samples of PCLs with NAC were designed and fabricated, and the temperature profiles and heat leakage are measured. The results show that NAC is available for minimum heat leakage at low current, and experimental results at 120 A match well with the simulation, which verifies that auxiliary cooling is necessary for high current.
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