Originally Posted by ericld
Good gosh, a 150 foot trench at 12 feet deep. What kind of excavator are you using. Ground water is going to be a major factor too. I would have a couple of guys and a CTL ready to start backfilling as you go. Take plenty of pictures, I got to see this. What part of Maryland are you at, I am in Hampton Roads. Might make a little road trip.
I'm aiming more for a 15 foot trench with one long piece of piping in 50% overlapped coils, with two layers. Now that the piping's arrived I can figure out how many feet of its used per trench foot. 3/4" HDPE in 3 foot coil loops with 50% overlap uses 8 feet of tubing per foot. Since this Caterpillar 325
excavator has a wider bucket than that I'll have more like a dozen feet per linear foot of trench. Somewhere around a true 15 foot length trench could handle my coils in one layer, I'll look into this. The biggest problem will be getting the coils into the trench in an orderly fashion. Manipulating them with long poles is going to be challenging.
Originally Posted by [Adz]
I have absolutely no idea what you're doing because it all the terminology went right over my head, but it seems like you're burying a computer. Awesome
Just the radiator, effectively making one humongous cooler theoretically capable of removing well over 1000w at a 1 degree Fahrenheit delta. We'll see about that though...
Getting the 1-wire system figured out and operation is going to be my biggest bottleneck. If it isn't worth strapping temperature probes to the tubes buried underground this could go a lot faster. I'm starting to convince myself the loop temperature will be so close there that it doesn't matter or the ground will throw them off. Buried in-line sensors are out of the question.
I could place only one sensor in the trench to get the loops soil temperature and only measure the HDPE pipes temperature in-line at its ends. If that's good enough, the loop could be finished in days with the sensors coming online later.
The piping coil arrived today, and the pump is in Richmond ready for delivery tomorrow. I'm fully committed to this if there are any doubts out there.
The coil markings. I have two fittings to jam into the ends but need to pick up the double clamps. At this "low" pressure they shouldn't leak. Proper fusion bonded connectors for HDPE piping is quite a bit out of the budget.
The Caterpillar 325 xtreme pc project tool.
Here's the four foot wide bucket with a cameo appear of my house in the top right. That corner is where my computers are and where the HDPE pipes will probably come up. The crawl space is several feet high on the side of the hill, so working under there will be easy.