Your Questions About Homemade Solar Water Heaters
Ruth asks…
I am making a solar hot water heater as the project for my Engineering Science class. My question pertains to the gas in the panel. Which gas would give the highest temperature inside the panel? And also, If i pressurize the panel chamber would it effect the temperature inside the panel?
Henry Dover answers:
Thermal mass (also called heat capacity) is the capacity of a body to store heat. There are two varieties of the heat capacity Cp and Cv where Cp is ate constant pressure and Cv is at constant volume, the higher the heat capacity the more heat the substance may retain, Hydrogen has a very high heat capacity 10.16 kJ/kg*K, though it may be a bit dangerous, the next could be Nitrogen tetroxide at 4.6 kJ/kg*K, the heat capacity is a function of temperature, and will vary as the temperature changes.
Http://www.engineeringtoolbox.com/spesific-heat-capacity-gases-d_159.html
Thomas asks…
Would you make a homemade solar hot water heater or buy a bunch of compact flourescent bulbs and donate them to help get the word out? Tell me what you would do to help save the planet for our future generations.
Henry Dover answers:
I would invest that pocket change to buy stock in oil companies. Then, when the next gas hike hits, i’ll turn around and sell the stock for a profit. The profit (worth more than a measly $100) can then be used for more than just a hand out to our future generations. Like say purchasing 100 acres of pristine wilderness to keep it from developers.
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