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Forum: Geothermal & Heat Pumps

11-29-15, 09:02 AM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 117,379

Posted By mejunkhound

I would like for it to be as efficient as...

I would like for it to be as efficient as sensibly possible.

May have missed it in a previous post, but have you looked at all the ramifications and advantages of the different changes? Versus...

Forum: Geothermal & Heat Pumps

11-27-15, 09:25 PM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 117,379

Posted By mejunkhound

easier and cheapest just to buy a 220v 3phase...

easier and cheapest just to buy a 220v 3phase comp

If you do not have a few old transformers, diodes, inductors and capacitors sitting on your parts shelves,

YES.

However, you need to...

Forum: Geothermal & Heat Pumps

11-27-15, 07:38 PM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 117,379

Posted By mejunkhound

1 phase 220v to 3 phase 575v? First thought...

1 phase 220v to 3 phase 575v?

First thought would be external autotransformer to boost voltage, external bridge rectifier and feed the VFD with dc, and add in a big inductor (1 mh or bigger) in...

Forum: Geothermal & Heat Pumps

11-20-15, 04:55 AM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 117,379

Posted By mejunkhound

Don't bother trying to coil it, simply use...

Don't bother trying to coil it, simply use straight pipes, 180 deg bend at one end.

Own house has 5T HE, 80 ft of 3/4 Cu pipe inside 1-1/4" PVC pipe. 40 ft across basement ceiling and back. ...

Forum: Geothermal & Heat Pumps

09-29-15, 12:34 PM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 117,379

Posted By mejunkhound

Have thought about using pex with bbq propane an...

Have thought about using pex with bbq propane an big filter/dryer for DX system for the barn heat, never have gotten around to trying it. Pex only on evaporator, no reversing valve so pressure...

Forum: Geothermal & Heat Pumps

09-28-15, 01:11 PM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 117,379

Posted By mejunkhound

I've only read the first few posts (up to pump...

I've only read the first few posts (up to pump and dump) and the last few.

Folks are greatly exagerating the amount of coaxial tube in tube evaporator needed for HP operation. The tube in tube...

Showing results 1 to 6 of 6

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