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Search took 0.00 seconds. Search: Posts Made By: jeff5may
Forum: Geothermal & Heat Pumps 11-30-20, 03:00 AM
Replies: 220
Views: 133,800
Posted By jeff5may
Awesome to hear from you! So your rig has been...

Awesome to hear from you! So your rig has been running faithfully for 5 years now? At 20 cents a day instead of 50 or 60? With zero maintenance. Man, that's 700 bucks. WOW
Forum: Geothermal & Heat Pumps 06-17-16, 09:17 AM
Replies: 220
Views: 133,800
Posted By jeff5may
Some pics worth thousands of words: ...

Some pics worth thousands of words:

http://hitchingsdesign.com/wp-content/uploads/2015/07/MicroChannel-Evap-Hero.jpg
Shiny new a-coil
...
Forum: Geothermal & Heat Pumps 06-15-16, 09:24 AM
Replies: 220
Views: 133,800
Posted By jeff5may
The water in the spines actually helps transfer...

The water in the spines actually helps transfer heat better. Much research has been done on the subject of spiny pipe versus tubes and fins. Main ideas: spiny pipe costs the least to make, has...
Forum: Geothermal & Heat Pumps 06-14-16, 12:08 PM
Replies: 220
Views: 133,800
Posted By jeff5may
Nice! What a radical change! You can't say the...

Nice! What a radical change! You can't say the air-cooled evap is too small compared to the dx loop...

However, I suspect you will be running into the same situation other dude is with your...
Forum: Geothermal & Heat Pumps 10-29-15, 10:58 PM
Replies: 220
Views: 133,800
Posted By jeff5may
I dontt know if you are aware of this, but the...

I dontt know if you are aware of this, but the mapp/pro gas in the yellow cylinder isn't actually pure propylene. A mixture of propyne 30%, propadiene 14%, propylene 43%, propane 7%, C4H10...
Forum: Geothermal & Heat Pumps 09-11-15, 08:55 PM
Replies: 220
Views: 133,800
Posted By jeff5may
Someone needs to build a refrigerator water...

Someone needs to build a refrigerator water heater. No doubt about it. Something euro-sized, somewhat smaller than an American-market dishwasher or oven unit. Large enough for two kitchen sinks of...
Forum: Geothermal & Heat Pumps 09-10-15, 06:50 AM
Replies: 220
Views: 133,800
Posted By jeff5may
The same firm that specializes in the tiny...

The same firm that specializes in the tiny compressors also builds larger bldc units. These ones run off r600a (butane lighter fuel):
H Series Catalogue -...
Forum: Geothermal & Heat Pumps 09-02-15, 08:58 PM
Replies: 220
Views: 133,800
Posted By jeff5may
Smaller than a beer can!...

Smaller than a beer can!...
Forum: Geothermal & Heat Pumps 08-21-15, 07:44 PM
Replies: 220
Views: 133,800
Posted By jeff5may
OK, I understood what you said, but not sure how...

OK, I understood what you said, but not sure how much you can afford to pay right away. Nor how much power you will be generating eventually. I suggested a micro inverter based on your current...
Forum: Geothermal & Heat Pumps 08-21-15, 08:00 AM
Replies: 220
Views: 133,800
Posted By jeff5may
For now, rig up a micro inverter to your existing...

For now, rig up a micro inverter to your existing home power. Grab a panel or two and directly cut your power bill while the sun is shining. Let the utility grid be your battery. Later, you can...
Forum: Geothermal & Heat Pumps 08-07-15, 10:48 AM
Replies: 220
Views: 133,800
Posted By jeff5may
What? It still works? IMPOSSIBLE! That should...

What? It still works? IMPOSSIBLE! That should have exploded by now.... Grumble humbug.

Just kidding. Good to hear it held up under a heavy load, well on its way to paying for itself. Once you...
Forum: Geothermal & Heat Pumps 07-12-15, 09:25 AM
Replies: 220
Views: 133,800
Posted By jeff5may
Nononono! Don't ruin it, man. Run what you brung...

Nononono! Don't ruin it, man. Run what you brung and get some good data for posterity. This configuration is relatively easy to rig, and is predictable and highly reliable. Your numbers seem too good...
Forum: Geothermal & Heat Pumps 06-24-15, 10:50 AM
Replies: 220
Views: 133,800
Posted By jeff5may
Oh no... is this a trick question? You read...

Oh no... is this a trick question?

You read the disclaimer, right? I'm not a salesman, nor an HVAC parts guy. I am not recommending anything, just provoking the imagination. Jake is planning on a...
Forum: Geothermal & Heat Pumps 06-23-15, 10:28 PM
Replies: 220
Views: 133,800
Posted By jeff5may
Ok, here comes the disclaimer again. I am not an...

Ok, here comes the disclaimer again. I am not an HVAC guy, so I don't play by the rules as far as common practices and carbon copy responses. As experimental rigs, you can expect not to break even on...
Forum: Geothermal & Heat Pumps 06-11-15, 07:15 PM
Replies: 220
Views: 133,800
Posted By jeff5may
The short answer is definitely maybe for a few...

The short answer is definitely maybe for a few minutes. The next shorter answer is it really depends on a whole lot of factors. Things like duty cycle, intended purpose, and level of complexity come...
Forum: Geothermal & Heat Pumps 06-11-15, 08:00 AM
Replies: 220
Views: 133,800
Posted By jeff5may
Guys, it was me who made the exaggerated claims....

Guys, it was me who made the exaggerated claims. This is what the people who are not scientists do to rile up the starving masses who do the labor. When the project is done, the scientists reconile...
Forum: Geothermal & Heat Pumps 06-10-15, 09:45 PM
Replies: 220
Views: 133,800
Posted By jeff5may
Like usual, AC has nailed the math and...

Like usual, AC has nailed the math and performance analysis of this setup. His two custom charts tell the story pretty well. Memphis did his homework on this one pretty well. The borehole is sized...
Forum: Geothermal & Heat Pumps 06-10-15, 08:05 PM
Replies: 220
Views: 133,800
Posted By jeff5may
Oooh, those latest numbers look so, so good. you...

Oooh, those latest numbers look so, so good. you are now at the points where most engineers would stop optimizing the capillary tube size and move on to the charge. Your superheat and subcooling...
Forum: Geothermal & Heat Pumps 06-10-15, 12:16 PM
Replies: 220
Views: 133,800
Posted By jeff5may
The real deal with capillary tubes, as has been...

The real deal with capillary tubes, as has been stated previously, is that a small difference in diameter drives a huge change in pressure drop. As the charts depict, the mass flow at a certain delta...
Forum: Geothermal & Heat Pumps 06-10-15, 10:59 AM
Replies: 220
Views: 133,800
Posted By jeff5may
*duplicate of post below before editing*

*duplicate of post below before editing*
Forum: Geothermal & Heat Pumps 06-09-15, 08:33 PM
Replies: 220
Views: 133,800
Posted By jeff5may
If you trust your filter, then by all means use...

If you trust your filter, then by all means use it. The cap tube is a predictable metering device with no moving parts. If it clogs, you can tell pretty easily. If it does clog, just chop off a...
Forum: Geothermal & Heat Pumps 06-09-15, 09:50 AM
Replies: 220
Views: 133,800
Posted By jeff5may
This product will take care of the contamination...

This product will take care of the contamination issue if it exists.
Supco (http://www.supco.com/web/supco_live/products/SUD111.html)

Supco model no. Sud111 or sud115

Cap tube is no. Bc1,...
Forum: Geothermal & Heat Pumps 06-07-15, 10:55 PM
Replies: 220
Views: 133,800
Posted By jeff5may
The rumbling or whoosh sounds come from liquid...

The rumbling or whoosh sounds come from liquid and oil passing through. It's a good thing. When you hear nothing or hissing sounds, it means there is only gas passing through. Not good except at...
Forum: Geothermal & Heat Pumps 06-07-15, 08:59 PM
Replies: 220
Views: 133,800
Posted By jeff5may
The initial rumble is from your condenser...

The initial rumble is from your condenser reaching its critical point. At startup, as much of the liquid that will condense will be in the coldest section. This will be your borehole, or in winter,...
Forum: Geothermal & Heat Pumps 06-07-15, 06:19 PM
Replies: 220
Views: 133,800
Posted By jeff5may
In your setup, a txv is going to be trying to be...

In your setup, a txv is going to be trying to be a fixed orifice, running full bore, until something bad makes it close. This something bad is going to be excessively high liquid line pressure or a...
Showing results 1 to 25 of 42
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