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Search: Posts Made By: Mobile Master Tech
Forum: Conservation 11-18-20, 06:39 PM
Replies: 60
Views: 37,792
Posted By Mobile Master Tech
Back on this forum after a long absence! The...

Back on this forum after a long absence! The Certainteed Landmark shingles in Silver Birch color have held up well. A minor issue: they seem to lose more granules over time than others I have seen. I...
Forum: Geothermal & Heat Pumps 11-22-16, 04:42 PM
Replies: 31
Views: 21,429
Posted By Mobile Master Tech
Yep, any "hot fill" bottles will work. After...

Yep, any "hot fill" bottles will work. After studying (with odd looks from passerby) all different kinds of bottles in grocery stores, the Ocean Spray and PowerAde bottles have the most efficient...
Forum: Geothermal & Heat Pumps 08-10-16, 01:01 PM
Replies: 31
Views: 21,429
Posted By Mobile Master Tech
THIS LINK ...

THIS LINK (http://www.energyvanguard.com/blog-building-science-HERS-BPI/bid/76941/The-Diminishing-Returns-of-Adding-More-Insulation) and also THIS ONE...
Forum: Geothermal & Heat Pumps 03-19-16, 02:44 PM
Replies: 4
Views: 2,081
Posted By Mobile Master Tech
The European Union now allows flammable...

The European Union now allows flammable refrigerants per STANDARD EN378 (http://www.fridgehub.com/uploads/main_news_images/2013/07/BRA-Guide-to-Flammable-Refrigerants-Issue-1-Oct-12.pdf).

In...
Forum: Geothermal & Heat Pumps 03-19-16, 01:23 PM
Replies: 4
Views: 2,081
Posted By Mobile Master Tech
As time permits, I will move the content of my...

As time permits, I will move the content of my posts in the Manifesto about the vapor compression components of a HP here, and just leave a reference to them in the Manifesto.

A caveat to...
Forum: Geothermal & Heat Pumps 03-15-16, 10:19 AM
Replies: 21
Views: 6,183
Posted By Mobile Master Tech
BBP, I agree with others on crushing...

BBP,

I agree with others on crushing problems. I've studied underground bunkers for prepping. Nearly all instances of using a square box (Intermodal transport containers), the container has...
Forum: Geothermal & Heat Pumps 03-11-16, 07:07 PM
Replies: 1,942
Views: 1,643,600
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: Renovations & New Construction 03-07-16, 08:46 AM
Replies: 25
Views: 6,375
Posted By Mobile Master Tech
Bill, good point! The most extreme day you are...

Bill, good point! The most extreme day you are likely to see is the one you have to size for. The further that day falls from the average for it's month, the more shortfall you have if only using...
Forum: Geothermal & Heat Pumps 03-05-16, 01:40 PM
Replies: 31
Views: 21,429
Posted By Mobile Master Tech
I tested my 64oz Ocean Spray bottles. They...

I tested my 64oz Ocean Spray bottles. They actually hold 67oz filled to the brim. I can squeeze out 7 oz of water, or 11% volume change, and have them satisfactorily hold their shape. They can...
Forum: Introductions 03-05-16, 12:51 PM
Replies: 25
Views: 8,019
Posted By Mobile Master Tech
Even if there are pumps in the box, their energy...

Even if there are pumps in the box, their energy draw is not subtracted from the COP, making those advertised numbers bigger.

From Wikipedia: "ASHRAE transitioned to ISO 13256-1 in 2001, which...
Forum: Geothermal & Heat Pumps 03-05-16, 11:04 AM
Replies: 1,942
Views: 1,643,600
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, 10:54 AM
Replies: 1,942
Views: 1,643,600
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: Introductions 03-05-16, 10:03 AM
Replies: 25
Views: 8,019
Posted By Mobile Master Tech
Jeff, those EER numbers are off a bit. 1:1...

Jeff, those EER numbers are off a bit. 1:1 COP=3.41 EER, since 1 Kw=3412 btu. A COP of 4-5 would be to 13.6-17 EER. An EER of 30 would be a COP of 8.8. Doable, but very lofty. Were they getting SEERs...
Forum: Introductions 03-05-16, 09:53 AM
Replies: 25
Views: 8,019
Posted By Mobile Master Tech
Sam, +1 on Jeff & Steve's comments. I will add...

Sam, +1 on Jeff & Steve's comments. I will add that the efficiency of an open source heat pump depends heavily on the energy needed for pumping. Your ground & groundwater temp is probably around 47F...
Forum: Introductions 03-04-16, 03:44 PM
Replies: 25
Views: 8,019
Posted By Mobile Master Tech
Yes, the inverter drive units keep up with cold...

Yes, the inverter drive units keep up with cold temps. Most are rated to work down to 0F such as THIS Gree U-Match 24kbtu UNIT (http://www.ecomfort.com/Gree-UMAT24HP230V1AD-S/p56889.html)which...
Forum: Solar Heating 03-03-16, 02:02 PM
Replies: 14
Views: 9,093
Posted By Mobile Master Tech
BBP, thanks for linking to this thread. Nice...

BBP, thanks for linking to this thread. Nice tank!

First, PEX has low thermal conductivity, especially in 3/4" or larger because of the wall thickness. For not much more, you can get 1'...
Forum: Introductions 03-03-16, 10:23 AM
Replies: 25
Views: 8,019
Posted By Mobile Master Tech
Welcome, Sam! I have made a number of posts...

Welcome, Sam!

I have made a number of posts that describe simpler, more effective ways to make the house more efficient and get what you need sustainably so you can fire your utilities. Instead...
Forum: Geothermal & Heat Pumps 03-03-16, 09:50 AM
Replies: 1,942
Views: 1,643,600
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: Solar Power 03-03-16, 12:50 AM
Replies: 26
Views: 6,255
Posted By Mobile Master Tech
A 2013 Chevy Volt, loaded, Certified Preowned...

A 2013 Chevy Volt, loaded, Certified Preowned with 50k miles can now be had for $15k. GM was very conservative with their batteries, only using about 65% of capacity and never fully charging or...
Forum: Geothermal & Heat Pumps 03-03-16, 12:28 AM
Replies: 1,942
Views: 1,643,600
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, 05:25 PM
Replies: 1,942
Views: 1,643,600
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: Renovations & New Construction 03-02-16, 04:27 PM
Replies: 588
Views: 268,996
Posted By Mobile Master Tech
Yep, those are good for 230F instead of the usual...

Yep, those are good for 230F instead of the usual LLDPE at 150F. Any pointers on how to tell one from the other on quick visual inspection?
Forum: Renovations & New Construction 03-02-16, 11:45 AM
Replies: 588
Views: 268,996
Posted By Mobile Master Tech
HERE...

HERE (http://ecorenovator.org/forum/21847-post1232.html) is a description of a lot of my system and house. The more detailed thread about annualized storage of heat for floors and DHW is HERE.
...
Forum: Conservation 03-02-16, 11:14 AM
Replies: 14
Views: 5,781
Posted By Mobile Master Tech
You should be good with your heat exchanger idea...

You should be good with your heat exchanger idea since you have separate runs for each, as long as the units are designed to use a more restrictive metal coaxial air/flue combination. You mentioned...
Forum: Renovations & New Construction 03-02-16, 10:56 AM
Replies: 588
Views: 268,996
Posted By Mobile Master Tech
I have hydronic floors and A/C too. I wanted the...

I have hydronic floors and A/C too. I wanted the floors to be the heat source for efficiency, comfort and the ability to use solar heat stored geothermally. You can't cool building surfaces for AC...
Showing results 1 to 25 of 142

 
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