Quote:
Originally Posted by schamp
I did it with my house in 2002. I have two 3 ton units with about 4000 feet of tubing in the ground on each side of the house. They do work but not a great as we were led to believe. I have added another 2 ton unit and use it just for the master bedroom and master bath. Its works great. Don't max out your system.
I was able to get three 2 ton systems (florida heat pumps, geothermal) at a really good price. I am looking to put these in my shop. I plan on running the geothermal lines down to the lake. Shop is 40 x 60 x 16, insulated, metal. I am hoping 6 tons is enough.
If you put one in, don't forget about you maintenance. When the antifreeze in the lines gets tired, ph drops, and the rust inhibitors wear out, it will absolutely rust out your pump housing. Pumps are expensive.
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Thanks for the heads up!
I'm slightly miffed regarding antifreeze in the lines. Which circuit are we talking about? Only circuit containing "antifreeze" in my case is the one that goes into 700ft drilled well. around 300L of it. It's not glycol but 50% ethanol, as leaked glycol would poison the underground water. The hot loop under floors only circulates tap water. The plumber made a nice system which allows me to easily flush/refill the floor circuit with tap water, by opening a valve(s).
This is my pump:
http://www.ivt.se/pages/product.asp?lngID=344&lngLangID=1
Theoretical COP is 4.8, which means that I could get 4.8kW of heat for every kW of electrical power that goes into the pump. But I assume it's only in the best of cases. Brine water goes down to well around 2.6 deg. C and comes back at 4.6 deg. C when pump is operating fully.
Regards,