Hello, I live in Corpus Christi Texas. I have read another persons experience of drilling in Houston Texas and finding the water table at around only 10 ft. below surface. I was wondering if this could be a problem with installing vertical shafts for sending and returning air for cooling a small Greenhouse(H=8' W=10' L= 20')? Or could this be a usable feature as water is good for heat transfer? The temperature here is almost always HOT year round and I've read the ground temperature is around 70 degF. I was envisioning a simple solution such as blowing air from the Greenhouse down into each hole and having a second return pipe coming from each hole to return the cooler air with the top of bore whole sealed off. Would something like this be feasible in a climate like south Texas using multiple bore holes? I want to make sure before I get someone to bore holes for me. Also, the reasons I was thinking of vertical shafts are; 1. I assume my whole yard would have to be dug up, yikes. 2. The cost of snaking horizontal pipes around might have bad return on investment for me. Thanks for any advice or experiences!
I know it's been done. If you can dig a really wide and deep hole it will work. Better to pull the air from the hole.
Per volume, water has about 3200 times the heat transfer capabilities than air has, which is why I have to see a ground source air system work well, and be cost effective. Plus your delta T would not be very high either, unless you have a really large system. In short, ......do not bother.
It surprises me how many homeowners contact us thinking that we just circulates "cold" water from deep down and pipe it through the house. One called wanting to know how deep we would have to drill to get enough steam for a steam powered generator for their house......
