Sounds good, I wasn't reading what you said at first clearly about you using it for your hot water tank as long as the heated CO2 manages to get the heated water down to the hot water tank then that sounds good. Some pumps use a minuscule amount of power though, I think there was a thread here with someone discussing using a pump for off-grid and looking at the 10-20 watt range. If 10 watts could do it and the pump ran for 8 hours a day that is only 2.5 kwh. If you ran it cycling on only peak sun and disabled it when the temperature of the tank is getting higher than it should be you'd be in the sub 2kwh range. Probably about 25 cents of electricity or the same as a 1 degree setback your heat pumps for a night. I'm not saying its a bad idea or anything but in case CO2 doesn't work as you plan.
|