Pasco TD-8564 THERMAL EFFICIENCY APPARATUS Manuel d'utilisateur télécharger pdf (Page 21)

012-05443A Thermal Efficiency Apparatus

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

for measuring I

= V

to ice water

tub

Ω

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Pasco TD-8564 THERMAL EFFICIENCY APPARATUS Manuel d'utilisateur Page 21