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Author Topic: Solar hot water heater - opinion required on design options  (Read 11893 times)

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Offline Wolvenar

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Re: Solar hot water heater - opinion required on design options
« Reply #15 on: January 03, 2013, 10:44:08 am »
Mad, I'm not sure 5 gallons is going to help you much, it's not a lot of energy storage at any reasonable temperature.

Do the math, ( equation found here)
http://www.engineeringtoolbox.com/energy-storage-water-d_1463.html

E = cp dt m             (1)

where

E = energy (kJ, Btu)

cp = specific heat capacity (kJ/kgoC, Btu/lb oF) (4.2 kJ/kgoC, 1 Btu/lbmoF for water)

dt = temperature difference between water stored and the surroundings (oC, oF))

m = mass of water (kg, lbm)

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Offline MadScientist267

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Re: Solar hot water heater - opinion required on design options
« Reply #16 on: January 04, 2013, 12:02:32 pm »
That I realize... That equation may or may not prove useful in my case, but I wouldn't even bother until I have the mega insulation done. I'll be picking up the pink foam tonight, along with some foam in a can, and see how that does.

Steve
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