Performances of thermoelectric cooling system for cooling flowing water in a water block

Abstract

This study investigated thermoelectric cooling system performances to cool the water flowing inside a water block. The experiments employed two identical thermoelectrics model TEC2-25408 with an overall dimension of 40 mm x 40 mm x 6.4 mm. The cold side of the thermoelectric was affixed to the top surface of the water block, while the hot side of the thermoelectric was attached to the heat pipe. The mass flow rates of the water were varied, i.e. 1 g/s, 1.5 g/s, and 2 g/s. Calibrated K-type thermocouples with an uncertainty of ± 0.5°C were used for measuring the temperatures. The experiment was observed for about 5 hours. All data were recorded using the data logger DAQ MX 9714 NI that was connected to the PC with the LabView program. The results show that raising the mass stream rate increases the cooling capacity and the COP. However, the effect of the mass stream rate on the water temperature at the outlet is unclear. In general, the thermoelectric has less advantage for cooling flowing water.