PASCO ET-8782 Energy Transfer– Thermoelectric - Manual (Page 31)

Model No. ET-8782 Energy Transfer –Thermoelectric
31 ®
Experiment 4:
Coefficient of Performance
Introduction
Some heat pumps, such as refrigerators and air conditioners, are used for their cooling effect.
They pump heat out of a container or a building, making the interior cooler than the surrounding
environment. But a heat pump can also be used to pump heat into a building, making the interior
warmer than the surrounding environment.
An important property of a heat pump is how much energy it uses to move a certain amount of
heat. In this activity you will measure the Coefficient of Performance of a heat pump working in
both modes, and discover how a heat pump can be more efficient at heating a building than
conventional methods.
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 as shown in picture. Note the polarity.
2. Heat Sink and Insulator: Attach the heat sink to the aluminum block on the Hot Side of the
peltier. Place a foam insulator on the other block.
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
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
“Coeff of Performance” configuration file for DataStudio part of ET-8782