I just got plans for a job that has geothermal heating and cooling, and it got me thinking how many of you guys work with geothermal or would consider it.
#1 - Homework. Like most of the new energy efficient systems, they will pay off only if you do the math.
Eqipment is probably the most expensive part. Plus you'll need a ton of PEX tubing (3/4" IMO).
Check with RadiantPanelAssociation.org - they may have some useful literature on the website.
Its not going to become popular thats for sure , its way to labor intensive as well as not cost effective with today's economy.
There is not enough training or Push from the industry either
Its a nice thought and will just be like the whole "solar thing"
But I do like it, but as I said, The system is flawed.
We piped 2 scools in 06 that used geothermal. There were 49 wells at each facility 200 feet deep piped in series used 1.5" fused poly looped down each well. $130,000 just to gets the holes poked with the loops grouted in.
I called a buddy of mine that does drilling and asked him for a bid. He was afraid his old rig didn't have 98 holes left in it. :laughing: He passed on it.
Drilling was done with a regular water well rig. No casing.I believe the casing would inhibit heat trasfer. The grouting slurry is a special one that transfers heat very well. I would have to look up what it was. Don't forget to pressure test those loops before grouting:yes:How is the drilling done? Do they sink a casing or just drop the loops in the hole and pour in bentonite(sp?) slurry?