ME out there and any orther Geo installer please

GW

I'm installing a 3 ton system; the wrightsoft program is saying i should pipe the two vert bore in series. When I click the parallel option the program is saying the Reynolds number is too low. Thanks for any thoughts, I just need to decide before mr drill shows up

Gary

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[Deleted User]

Reynolds numbers don't lie...

Just make sure you can maintain the flow required with the head generated.

If you go parallel, and double the flow, the numbers may click in...

Plastic is SUCH a great insulator ;-)

ME

GW

ok

double the flow...jumbo pump?

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Rich L.

More holes?

Could you go more bores, not as deep? Once you're a couple of feet below your local frost line you start getting into stable ground temps. Then you could go shorter loops, parallel, lower head and smaller pump. May cost a little more upfront on the bores (hole set-up) but would have a greater lifecycle payback in efficiencies.

Mark Custis

Rich is right

Just get below frost line. 32*F glycol will make 125, 135*f water all day long at a 4 plus COP.

I build a radiant floor in a frost line plus a foot or two. Then pipe to the heatpump. I am waiting to use the insulated transportaion piping stuff.

Geo can be sooooo easy.

Plumdog_2

32*F Glycol

How do I mix up a batch of that 32*F Glycol?

Craig R Bergman

3 Ton Geo =

three bore holes. Vertical bores in Iowa *GENERALLY* require 150 ~ 250 ft deep bores. Piped parallel with reverse return should run like a champ.

Bergy

GW

cool

Thanks Craig,

I'm into rules of thumb just like the next guy; are you saying ignore the reynolds number? If I pipe it parallel the velocity is too slow.

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Rich L.

Too Slow?

Velocity is going to be a product of your pipe size, length and pump size.

We generally reserve using reynolds numbers for sizing loop fields for large scale projects like schools and commercial facilities, generally speaking in the hundreds of tons on up. I'm not saying you need to disregard those numbers on a three ton system, but I've never gone wrong with Craigs rule of thumb.