My Geo-source heatpump used four 300' deep wells of 4" diameter but the drilling and pipe itself cost $14,000.. Bob
On Sun, Mar 21, 2021 at 12:41 PM Peri Hartman via EV <ev@lists.evdl.org> wrote: > Another thought, which might be more effective, is to drill vertically > and insert a loop of small diameter pipe. For example, you could drill > several 1.5" bores down 200 or 300 feet and insert a loop of 1/2" pex. > I'm not sure how much drilling costs, but I know people are > experimenting with this technique, particularly for use in urban areas. > > On advantage of deep bores is you'll hit water tables which will make a > better heat sync both in the sense of better contact with the tubing and > more mass for dissipation. > > Peri > > << Annoyed by leaf blowers ? https://quietcleanseattle.org/ >> > > ------ Original Message ------ > From: "Bobby Keeland via EV" <ev@lists.evdl.org> > To: "Peter VanDerWal" <e...@vanderwal.us> > Cc: "Bobby Keeland" <keela...@gmail.com>; "Electric Vehicle Discussion > List" <ev@lists.evdl.org> > Sent: 21-Mar-21 9:31:12 AM > Subject: Re: [EVDL] Projects > > >Yes Peter VanDerWal (thanks for the reply) I am aware of all that you > said. > >I was planning on using at least 4 smooth wall tubes that are buried about > >10 feet deep with a downward slope away from the house. The earth tubes > >will be about 100 feet long, and the soil here is almost pure clay > >(southern Louisiana in the Atchafalaya Basin). > > > >A little over a year ago we had a heat source mini-split installed so we > >got a jump on being more efficient. The earth tube project has not > actually > >physically started yet. It’s more of a thinking and study real life > >experiences at this point. > > > >Right now I’m more interested in working on the 1951 Chevy pickup (we > >actually use pickups as pickups rather than as a manly car). There is a > guy > >on YouTube who is showing his complete process of moving a 1952 Chevy > >pickup onto an S-10 pickup frame. Something like that plus an electric > >motor and batteries (not lead acid) is what I have in mind. > > > >Another possible project is converting a riding lawn mower and Mantis > >tiller to battery electric. I watch Jehu Garcia a lot. There is never a > >shortage of possible projects. > > > >Bobby Keeland > >Not a lot of money, but I do have time and interest. > > > > > >On Sat, Mar 20, 2021 at 11:52 PM Peter VanDerWal <e...@vanderwal.us> > wrote: > > > >> Bobby, have you done any research on Earth Tubes? Not just looking up > >> testimonials and anecdotes, but looked for actual studies? > >> > >> I was really yped about earth tubes for a while until I looked into > them > >> and found a few studies. I found a lot of people claiming that all > they > >> did was dig 2 foot deep trenchs and burried 30 feet of tube and 'Wow, > what > >> a difference' > >> But the actual studies with measurements, etc. tell a different story. > >> > >> First of all you need to go a LOT deeper than 2 feeet, 6-8 foot > minimum. > >> One study I found was done in India as I recall, they were studying > using > >> Earth Tubes to cool a green house. > >> They used 4 tubes 100 feet long, 8 foot deep spaced 6 feet apart. The > fan > >> used to drive the air through them consumed 400-450 watts and ran 24 > hours > >> a day. It was effective at the begining of summer, but by the middle > of > >> summer the output air temps had climbed to around 80 degrees, the green > >> house temps were closer to 90 degrees. > >> > >> I also read lots of feedback from individuals that were having problems > >> with mold due to condensation in the earth tubes. That is solvable, by > >> making sure the tubes angle down, away from the house and you have > some way > >> to drain the moisture from them. > >> > >> My mini-split heat pump on the other hand uses about 1/2 the energy per > >> day to cool my house and output air temp is around 50-60 degrees an the > >> temp in the house stays below 76. I could get it cooler, but it would > use > >> more energy and I'm comfortable at that temp. > >> > >> So the mini-split is more effective, for less energy and a LOT less > work > >> to install. If you have to hire someone to dig the trenches, the > >> mini-split is probably cheaper. > >> > >> Sometimes the best solution is NOT the simplest solution. > >> > >> My PGP public key: https://vanderwal.us/evdl_pgp.key > >> > >> March 19, 2021 6:05 PM, "Bobby Keeland via EV" <ev@lists.evdl.org> > wrote: > >> > >> > In a previous posting I said: > >> > <Unfortunately I’m still working on my solar > >> > <water heater, my battery backup for the solar > >> > <panels, earth tubes and many other > >> > <projects. > >> > > >> > >-------------- next part -------------- > >An HTML attachment was scrubbed... > >URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210321/8ecfa3a4/attachment.html > > > >_______________________________________________ > >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > >ARCHIVE: http://www.evdl.org/archive/ > >LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > -------------- next part -------------- An HTML attachment was scrubbed... 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