PASCO ET-8782 Energy Transfer– Thermoelectric - Manual (Page 25)

Model No. ET-8782 Energy Transfer –Thermoelectric
25 ®
Experiment 3:
A Model Refrigerator
Introduction
In this activity you will use the peltier device to model a refrigerator. As you run your model
refrigerator, DataStudio will display the voltage and current supplied to the peltier, the
temperature of both blocks, and the temperature of the air flowing past the heat sink. You will use
these measurements to investigate some of the factors that affect the temperature of a refrigerator
Set-Up
1. Input Power: Set the Heat Pump/Heat Engine switch to the neutral position (straight up).
Connect the power supply using banana patch cords to the input power terminals on the
circuit board. Note the polarity.
2. Insulator: Place a foam insulator on the aluminum block on the Cold Side of the peltier.
3. Block Temperature: Connect the cables from the temperature ports on the circuit board to the
Quad Temperature Sensor. Connect the Cold Side to Channel 1 of the sensor and the Hot Side
to Channel 2.
4. Air Temperature: Set up two Fast Response Temperature Probes to measure the temperature of
the air before and after it flows through the heat sink. Use the temperature clamps to position the
probes below and above the heat sink (as shown in the picture). The probes should not touch the
Equipment Required Part Number
Thermoelectric circuit board part of ET-8782
Foam insulator part of ET-8782
Heat sink and thumbscrew part of ET-8782
Banana patch cords (qty. 4) part of ET-8782
Temperature cables (qty. 2) part of ET-8782
Fast Response Temperature Probes (qty. 2) PS-2135 (3-pack)
DC Power Supply (10 V, 1 A minimum) SE-9720A or equivalent
PASPORT Voltage/Current Sensor PS-2115
PASPORT Quad Temperature Sensor PS-2143
PASPORT interface(s) PS-2001 or equivalent
DataStudio software See PASCO catalog
“Refrigerator” configuration file for DataStudio part of ET-8782