In this lab you will measure the characteristics of a Peltier effect thermoelectric cooler.
FIRST, measure the ambient temperature of the heatsink and the resistor. Refer back to your notes from lab #1 since the heatsink and the resistor are the same type and so emissivity will be the same. Mount the heatsink flat against an insulating surface (in the same manner as lab #1) so the thermal resistance will be known.
SECOND, power the TEC with a current of 2A. Allow the temperature of the resistor and heatsink to both stabilize then measure each as well as the exact current and voltage of the TEC. With no current through the load resistor this temperature increase will be due solely to the dissipation of power created by the TEC itself.
THIRD, with the TEC still operating drive the resistor to a current of 0.447A so that a load power of 10W is created. Allow the temperature to stabilize again and measure both the resistor and heatsink temperature.
FOURTH, turn the resistor off but leave the TEC powered. Add a fan (in the same manner as lab #1) to decrease the thermal resistance.
FIFTH, when the temperature has stabilized measure both again.
SIXTH, power the resistor to dissipate 10W again and measure the temperatures again once they have stabilized.
For this experiment, an abbreviated lab report is required (word processed, never hand-written) with the same format as PHTN1300. Answer each question in the form "4a., 4b., 4c. ..." with each new question (#4, #5, etc) beginning on a new page. Do NOT answer an entire question (e.g. question 4) as a single paragraph without identification of sub-parts ('a', 'b', etc). Submit the lab report in a bound folder NOT simply a pile of loose, stapled papers nor a thick binder!
Each student must submit a unique lab report - no portion other than the results must be shared between lab group members. For all calculations show the formula used and all substituted values (i.e. show your work, not just the final value). If a value is used from a previous lab, state this.