Investigation of thermal contact effect on thermoelectric coolers

Abstract The effect of the thermal and contact resistances of ceramic plates plays a vital role in thermoelectric (TE) coolers with relatively short thermoelements, especially in TE microcoolers. Through first introducing equivalent impedances, like equivalent thermal conductance, electrical resistance etc., general performance formulae with familiar forms are developed to take into account the thermal contact effect on TE coolers. Then, two new approaches are presented to obtain simplified formulae at maxima for temperature difference, cooling rate and coefficient of performance. Compared numerically with real maximum cooling performances of TE coolers, simplified formulae are proved to be good approximations at small thermal contact resistance and not-too-short thermoelements. In addition, some errors in previous investigators’ models are redressed.

[1]  M. Yamanashi,et al.  A new approach to optimum design in thermoelectric cooling systems , 1996 .

[2]  Chih Wu,et al.  Specific heating load of thermoelectric heat pumps , 1994 .

[3]  U. Ghoshal,et al.  Study of interface effects in thermoelectric microrefrigerators , 2000 .

[4]  Bihong Lin,et al.  Optimal design of a multi-couple thermoelectric generator , 2000 .

[5]  F. Disalvo,et al.  Thermoelectric cooling and power generation , 1999, Science.

[6]  J. Fleurial,et al.  Novel high performance thermoelectric microcoolers with diamond substrates , 1997, XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291).

[7]  U. Ghoshal,et al.  Advanced electronic microcoolers , 1999, Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407).

[8]  D. Rowe.  CRC Handbook of Thermoelectrics , 1995 .

[9]  Brian C. Sales,et al.  Thermoelectric Materials: New Approaches to an Old Problem , 1997 .

[10]  D. Rowe,et al.  Cooling performance of integrated thermoelectric microcooler , 1999 .

[11]  Richard Ewell,et al.  Thermoelectric microcoolers for thermal management applications , 1997, XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291).

[12]  Gao Min,et al.  Improved model for calculating the coefficient of performance of a Peltier module , 2000 .

[13]  Gao Min,et al.  Integrated thin film thermoelectric cooler , 1998 .