Experimental working conditions (atmospheric: 13 C and
1 bar) are essentially constant for each of the thermocouple sizes
and every exposed wire length. During the experiments and due to the temperature difference between peltier surface and
(4 Ce35 C) and the environment heat will be conducted along the
thermocouple wires. Fig. 2(a and b) shows the error in temperature
measurement by the thermocouple versus actual peltier temperature.
The plots in Fig. 2(a and b) should have zero slopes if there is
no temperature measurement error; however this is clearly not the
case. It can also be seen that the 200 mmthermocouple has a higher
conduction error than 80 mm for different stripped lengths as
shown in Fig. 2(a) and (b). The reason for this is that the larger
diameter provides a larger heat transfer area and consequently the
heat flux to or from the thermocouple is higher.