4. Conclusion
The TEC cold plate temperature inside TER was using the electric current of 3.5 A and then decreased temperature from 30 ºC to – 4.2 ºC for 1 hr and continuous to –7.4 ºC for 24 hrs. The TER was decreased from 30 ºC to 20 ºC for 1 hr and slowly decreasing temperature for 24 hrs. The maximum COP of TEC and TER were 3.0 and 0.65, respectively.