PASCO TD-8564 THERMAL EFFICIENCY APPARATUS - Manual (Page 21)

012-05443A Thermal Efficiency Apparatus
17
Experiment 3: Heat Pump Coefficient of Performance
EQUIPMENT NEEDED:
— Thermal Efficiency Apparatus — 1 DC power supplies capable of 2.5 A at 12 V
— patch cords — ohmmeter
— ammeter (up to 3 A) — voltmeter
— 3 kg — (7 lbs) ice and a bucket for the
ice-water bath
➤ NOTE: Before doing this experiment, it is necessary to perform the HEAT ENGINE
EFFICIENCY experiment to get the data necessary to determine the internal resistance of
the Peltier device.
To complete the measurements for this experiment, use the following instructions to run the
apparatus as a heat pump (pumping heat from the cold side to the hot side):
Setup
➀
Prepare the ice-water bath and immerse both rubber tubes from the Thermal Efficiency
Apparatus into the bath (Figure 4).
to AC supply
for driving the Peltier device
for measuring temperatures
–
+
Power
Supply
Figure 3.1 Heat Pump Mode
for measuring V
w
for measuring I
w
P
w
= V
w
I
w
to ice water
tub
Ω
A
V