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Search: Posts Made By: Mobile Master Tech
Forum: Geothermal & Heat Pumps 03-11-16, 06:07 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Graphs and images are worthwhile but sometimes...

Graphs and images are worthwhile but sometimes get lost, including some from the earliest pages of this manifesto and my "Don't Waste That Heat" thread. Text doesn't get deleted. I'm not a genius at...
Forum: Geothermal & Heat Pumps 03-05-16, 10:04 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Don, an 11kbtu R22 compressor will put out less...

Don, an 11kbtu R22 compressor will put out less and be less efficient at low source temps, high lift or both-Be careful running against minimum pressures or high pressure ratios. It will put out more...
Forum: Geothermal & Heat Pumps 03-05-16, 09:54 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Thanks for the "Thank You", Zwerius! And to...

Thanks for the "Thank You", Zwerius! And to others who will surely do the same.


AC, I have read it twice and have been an active participant since THIS PAGE...
Forum: Geothermal & Heat Pumps 03-03-16, 08:50 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
I thought those topics (what refrigerant to put...

I thought those topics (what refrigerant to put in their hacked unit and why, safety issues, understanding equipment reliability limits hackers might be bumping against without realizing it, how to...
Forum: Geothermal & Heat Pumps 03-02-16, 11:28 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
I've been doing research to understand the...

I've been doing research to understand the potential risk of flammable refrigerants for our heat pumps, such as R290 we've discussed here. The automotive industry is phasing in R1234yf which is...
Forum: Geothermal & Heat Pumps 03-02-16, 04:25 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
I'm posting here because this thread is more...

I'm posting here because this thread is more relevant concerning getting higher temps from a GSHP efficiently and Mike's comments HERE:
(http://ecorenovator.org/forum/49311-post542.html)
I...
Forum: Geothermal & Heat Pumps 02-29-16, 02:10 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Sorry AC, We have all discussed numerous...

Sorry AC,

We have all discussed numerous refrigerants and heat exchange/storage methods in great depth in this thread. I thought a one-liner on thinking outside the box in this area might have...
Forum: Geothermal & Heat Pumps 02-26-16, 05:29 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Deleted at AC's request.

Deleted at AC's request.
Forum: Geothermal & Heat Pumps 02-24-16, 04:51 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Hello All, I've updated my heat storage/GSHP...

Hello All,

I've updated my heat storage/GSHP thread with some helpful insights and am asking for a little Phase Change Material help in post #15 of this thread:
...
Forum: Geothermal & Heat Pumps 06-07-13, 09:23 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
I have tested size 1212 12vdc BLDC computer...

I have tested size 1212 12vdc BLDC computer server blowers (around $10 ea), which can produce 1.35" of water column pressure. They move 15CFM at 0.93" while taking 6 watts, and pull 9 watts wide open...
Forum: Geothermal & Heat Pumps 06-07-13, 09:01 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Right-computer fans and server blowers are ECM's...

Right-computer fans and server blowers are ECM's (Electronically Commutated Motors), also known as brushless or BLDC (BrushLess DC). Since they need a power supply to run on mains current, I...
Forum: Geothermal & Heat Pumps 06-06-13, 07:48 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Forgot about the start circuit-thanks!

Forgot about the start circuit-thanks!
Forum: Geothermal & Heat Pumps 06-05-13, 09:00 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Well put! For perspective, though, the boats have...

Well put! For perspective, though, the boats have it a lot worse, especially considering the limited cubic footage in their bilge or engine room:

Gasoline vapors have a lower flammability limit of...
Forum: Geothermal & Heat Pumps 06-05-13, 05:37 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Leave it to the Russians to find yet another...

Leave it to the Russians to find yet another wonderful use for Vodka! Use your work-related consumables for pleasure!
Forum: Geothermal & Heat Pumps 06-05-13, 02:10 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
I also found some interesting references to the...

I also found some interesting references to the human safety and maximum Coefficient of Performances (COP) of some refrigerants, apparently the Carnot efficiency limits for a single stage:

CO2-COP...
Forum: Geothermal & Heat Pumps 06-05-13, 01:40 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Your reply to me a while back mentioned vodka and...

Your reply to me a while back mentioned vodka and welding together, it didn't even register to me at the time. How do you weld with vodka?!?

Craig
Forum: Geothermal & Heat Pumps 06-05-13, 12:08 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
I'm catching up on my favorite threads, and have...

I'm catching up on my favorite threads, and have a few points and questions.

Concerning flammable refrigerant fire safety, it is a good idea to make your flammable surroundings flameproof....
Forum: Geothermal & Heat Pumps 10-29-12, 11:29 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
By the way, I bought my A/C components from...

By the way, I bought my A/C components from Surplus City Liquidators. If you buy an air handler and outdoor unit, they will give 10% off their already low prices on everything on that order-ductwork,...
Forum: Geothermal & Heat Pumps 10-29-12, 11:20 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
"1.75 tons." Originally equipped with 2.5 ton...

"1.75 tons." Originally equipped with 2.5 ton downstairs and 2 ton upstairs units. We have the downstairs unit disabled for basement renovations/relocating and operated our 5BR/3.5BA house solely...
Forum: Geothermal & Heat Pumps 10-24-12, 07:19 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Been off the forum a while-busy with funerals and...

Been off the forum a while-busy with funerals and weddings! While researching energy storage methods for surplus off-grid PV electricity, I thought of using a commercial icemaker drawing "patented...
Forum: Geothermal & Heat Pumps 07-18-12, 05:38 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Great find on that chart, RB855, and welcome! The...

Great find on that chart, RB855, and welcome! The hydrocarbon refrigerants like R290, R600, R600a and any blend that has significant hydrocarbon content show "all" in the compatible oil types column.
Forum: Geothermal & Heat Pumps 07-18-12, 04:39 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Napathenic mineral oil can be used with...

Napathenic mineral oil can be used with CFC's(like R12) , HCFC's (like R-22), hydrocarbons (like R290) and ammonia-this is what most old school systems came with.

POE (Polyol ester) oil can be...
Forum: Geothermal & Heat Pumps 07-18-12, 10:18 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
Just an FYI on refrigerant oils. A/C components...

Just an FYI on refrigerant oils. A/C components are not drastically different from each other-made from the same things to do the same jobs, just optimized for the pressures and flow for that...
Forum: Geothermal & Heat Pumps 06-01-12, 12:39 PM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
While researching refrigerants, I have found LOTS...

While researching refrigerants, I have found LOTS of useful research that has been done through Perdue University. Anyone deciding what refrigerant to run should include Perdue when searching.
...
Forum: Geothermal & Heat Pumps 05-18-12, 09:55 AM
Replies: 1,943
Views: 3,686,231
Posted By Mobile Master Tech
The old roof was 144F while the new one was 124F,...

The old roof was 144F while the new one was 124F, (not 148F). A 20F temp reduction ain't shabby!
Showing results 1 to 25 of 30

 
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