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Old Jul 6th 2015, 08:47 PM   #1
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Join Date: Jul 2015
Posts: 3
Smile Transfer of heat.

Hey all, just need some help with a question for my homework...

The following improvements are made to a solar heater

1. The bottom and the sides of the box are lined with thick expanded polystyrene.

2. The top is covered with two layers of glass sheets and the air in between these glass sheets is removed to create a vacuum.

3. The copper pipe is painted black

I need to know if my answers are on the right track....... or if anyone can give me any good websites in relation to this topic or even offer some input, would be greatly appreciated.

1. By using polystyrene it will insulate the bottom and sides which will prevent heat loss by conduction, because polystyrene is a poor conductor.

2. The vacuum will prevent heat loss by conduction. Because the glass is vacuumed it is also a excellent insulator.

3 By painting the pipes black means that they will be better absorbers of radiant energy

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Old Jul 7th 2015, 03:11 AM   #2
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Join Date: Apr 2015
Location: Somerset, England
Posts: 684
1 Yes

2)
a) Yes
b) Do you know why even a single layer of glass would improve the solar panel?
Google 'Greenhouse effect'

3) Yes
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