PASCO ET-8593 Energy Transfer Solar - Manual (Page 12)

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Model No. ET-8593 Energy Transfer - Solar
11
Sample Data/Results
Experiment 1: Solar Heating
The covered box has the final higher temperature. With the covered
box, the greenhouse effect occurs. Light enters the transparent cover,
but the infrared light is not re-radiated back out. The infrared light
heats the plate. Also, the cover traps the hot air inside the box,
isolating and insulating the air.
Experiment 2: Solar Constant
= (0.085 kg) (900 joules/kg/
o
C) (0.361) = 27.6 watts Power
Q
∆
t
----- mc
∆
T
∆
t
------- = =
Intensity = 27.6 watts/0.038 m
2
= 730 watts/m
2
Note: This data
was taken late in
the afternoon.