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Search: Posts Made By: jeff5may
Forum: Geothermal & Heat Pumps 04-04-15, 07:32 AM
Replies: 148
Views: 160,048
Posted By jeff5may
Let me take a moment to reflect on that...

Let me take a moment to reflect on that statement.

During one of the worst and coldest winters in the last 50 years, your homemade 5 ton heat pump put out 4 tons of heat transfer at -22 degrees...
Forum: Geothermal & Heat Pumps 01-12-15, 03:47 PM
Replies: 148
Views: 160,048
Posted By jeff5may
I wish your previous monster would have lived...

I wish your previous monster would have lived longer. I loved the stainless steel basket and the custom adjustable txv. It had that unique look to it.

Stay warm, sir.
Forum: Geothermal & Heat Pumps 01-09-15, 03:00 PM
Replies: 148
Views: 160,048
Posted By jeff5may
Randy, Congrats on another awesome creation! It...

Randy,
Congrats on another awesome creation! It looks marvellous. I wish I could carve out enough time and space to build something similar. Every time I start working on something, another...
Forum: Geothermal & Heat Pumps 11-22-14, 12:06 PM
Replies: 148
Views: 160,048
Posted By jeff5may
The first heat exchanger you made is referred to...

The first heat exchanger you made is referred to as a "coaxial coil" or tube-in-tube heat exchanger, which is much different than a shell and tube hx. The shell and tube as well as the brazed plate...
Forum: Geothermal & Heat Pumps 05-14-14, 06:25 PM
Replies: 148
Views: 160,048
Posted By jeff5may
Sorry to say, but this is a common problem...

Sorry to say, but this is a common problem nowadays. The NIMBY ppl had most of the steel foundries in America shut down, so now most iron pipe and fittings come from China. Even the fittings that are...
Forum: Geothermal & Heat Pumps 04-30-14, 06:31 PM
Replies: 148
Views: 160,048
Posted By jeff5may
You could run both coils in tandem off of your...

You could run both coils in tandem off of your well pump. Then both the heat pump and the pre-cool exchangers would see the same source temperature. Some fiddling might be needed to balance the...
Forum: Geothermal & Heat Pumps 04-14-14, 06:07 PM
Replies: 148
Views: 160,048
Posted By jeff5may
Here's an idea: you could pre-cool the air as...

Here's an idea: you could pre-cool the air as before, using the 12 degC loop water before it went into your condenser hx. This would extract lots of moisture at uber-high COP. Directly downwind, the...
Forum: Geothermal & Heat Pumps 02-16-13, 06:08 PM
Replies: 148
Views: 160,048
Posted By jeff5may
Randen, Man, I just can't get over that...

Randen,

Man, I just can't get over that expansion valve mod! It just looks cool... like the red button on the car the men in black drive. In an industrial setting, it would have a big yellow tag...
Forum: Geothermal & Heat Pumps 02-14-13, 05:59 PM
Replies: 148
Views: 160,048
Posted By jeff5may
The moisture exploited in condensing boilers...

The moisture exploited in condensing boilers comes from combustion. Burning propane = 3 CO2 + 4 H2O. Unless the propane is contaminated, it contains 25 ppm or less of moisture. More than this amount...
Forum: Geothermal & Heat Pumps 02-10-13, 02:18 PM
Replies: 148
Views: 160,048
Posted By jeff5may
A little clarification on pipe insulation: ...

A little clarification on pipe insulation:

The less expensive type sold at the big-box stores (frost king O/E) is polyethylene plastic foam. This stuff is ok for insulating water pipes. At higher...
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