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Search: Posts Made By: jeff5may
Forum: Geothermal & Heat Pumps 10-23-21, 06:20 PM
Replies: 20
Views: 7,433
Posted By jeff5may
Your mini split unit has a variable speed...

Your mini split unit has a variable speed compressor. That's the wrench in the works as far as a simple control circuit. Don't know about the refrigerant metering, it could have an electronic...
Forum: Solar Power 09-15-21, 12:28 AM
Replies: 4
Views: 728
Posted By jeff5may
The reference angle is "lean back from vertical"...

The reference angle is "lean back from vertical" where zero points the panel at the horizon. An increasing angle points the face of the panel higher in the sky. If you look around in the mentioned...
Forum: Solar Power 09-14-21, 08:43 PM
Replies: 4
Views: 728
Posted By jeff5may
Welcome to the forums! I put Jose Pedro...

Welcome to the forums!

I put Jose Pedro varela into the solar irradiance calculator and it said:

42 degrees optimum winter angle
57 degrees best overall angle
72 degrees optimum summer angle...
Forum: Geothermal & Heat Pumps 09-13-21, 05:21 AM
Replies: 4
Views: 735
Posted By jeff5may
I called mine the howler. It was a ching Chong...

I called mine the howler. It was a ching Chong brand, Royal something. 12kbtu capacity. I saved a few hundred dollars a couple of winters in a row using it to heat a two story saltbox I was renting....
Forum: EcoRenovator Blog Discussion 08-17-21, 12:05 PM
Replies: 13
Views: 4,726
Posted By jeff5may
Although the rooftop solar rigs are very "eco"...

Although the rooftop solar rigs are very "eco" and a huge win for homeowners pretty much all the way around, they share the same avoidance factor as nuclear power plants. There's a not insignificant...
Forum: Solar Heating 08-08-21, 04:56 PM
Replies: 8
Views: 2,777
Posted By jeff5may
The garage and the basement workbench are both...

The garage and the basement workbench are both wrecks from hiding everything in sight. This is the month that every distant relative from around the universe decided to come visit. All of the...
Forum: Solar Heating 08-08-21, 04:45 PM
Replies: 8
Views: 2,777
Posted By jeff5may
Finally got a weekend off and threw the little...

Finally got a weekend off and threw the little collector together. I did a worksheet on the solar electricity handbook dot com website for solar irradiance and it said 52 degrees back from vertical...
Forum: Geothermal & Heat Pumps 08-05-21, 06:46 PM
Replies: 3
Views: 1,138
Posted By jeff5may
Just got a free minute to check the forums....

Just got a free minute to check the forums. Life's been hectic for the last few months and all the side project stuff got put on hold.

It looks as if you are overestimating your compressor mass...
Forum: EcoRenovator Blog Discussion 07-31-21, 10:14 AM
Replies: 13
Views: 4,726
Posted By jeff5may
Just took another look at this thread, and I'm...

Just took another look at this thread, and I'm sort of surprised there aren't more responses.

The thing that most sours my outlook on wind and solar sources is the natural gas backup that comes...
Forum: Geothermal & Heat Pumps 07-30-21, 12:00 PM
Replies: 5
Views: 910
Posted By jeff5may
Short term, quickie cheap: 220 window AC unit off...

Short term, quickie cheap: 220 window AC unit off marketplace or craigslist

Longer term, not too much: natural gas forced air garage heater plus mentioned window unit

Long term, somewhat not...
Forum: Geothermal & Heat Pumps 07-26-21, 10:12 AM
Replies: 2
Views: 1,549
Posted By jeff5may
It depends on the system. Lots of ifs and...

It depends on the system. Lots of ifs and measurements to verify, like in the picture. The main idea is that there's little to no subcooling in the condenser side of the system when a liquid receiver...
Forum: Introductions 06-25-21, 09:37 PM
Replies: 12
Views: 1,684
Posted By jeff5may
For some case studies, check out builditsolar.com...

For some case studies, check out builditsolar.com

For current prices and lots of helpful system info, check out renvu.com

You'll have to register to see prices at renvu, but it's worth it. The...
Forum: Geothermal & Heat Pumps 06-25-21, 01:45 PM
Replies: 4
Views: 1,311
Posted By jeff5may
Dguzzi, Google ammonia absorption...

Dguzzi,

Google ammonia absorption refrigeration.
https://en.m.wikipedia.org/wiki/Absorption_refrigerator

Same basic thing as phase change refrigeration, but without the power hungry...
Forum: Geothermal & Heat Pumps 06-14-21, 12:33 AM
Replies: 4
Views: 1,311
Posted By jeff5may
You just described how a commercial ice machine...

You just described how a commercial ice machine works. Cycle starts, and a valve fills up a tank to a preset level. A pump recirculates the water over the evaporator / mold. A probe senses the ice...
Forum: Geothermal & Heat Pumps 05-29-21, 05:19 AM
Replies: 3
Views: 1,218
Posted By jeff5may
If the guts were in fact exposed to atmosphere,...

If the guts were in fact exposed to atmosphere, it is pretty easy to check for moisture in the system. The HVAC supply houses have "the stuff" to do it with. Not free, but not super expensive.
...
Forum: Solar Heating 05-23-21, 04:40 AM
Replies: 8
Views: 2,777
Posted By jeff5may
Sorry, life and my schedule got in the way. Got...

Sorry, life and my schedule got in the way. Got everything done with the smaller one except the glass. The particle board I used was a little swollen in a few places, so the glass won't fit inside...
Forum: Solar Power 05-19-21, 01:47 AM
Replies: 745
Views: 232,002
Posted By jeff5may
Mike, Enphase makes a whole microgrid...

Mike,

Enphase makes a whole microgrid setup. The batteries come in 3.4 kwh (encharge 3) and 10 kwh (encharge 10) capacities. The hub that connects the grid, the panels, the batteries and the home...
Forum: EcoRenovator Blog Discussion 04-10-21, 09:10 PM
Replies: 13
Views: 4,726
Posted By jeff5may
Solar thermal and PV is a good investment for us...

Solar thermal and PV is a good investment for us "small guys": individual and single family home dwellers. Nearly as good for retail store rooftops. Return on investment is usually pretty short...
Forum: Lawn and Garden 03-26-21, 04:08 PM
Replies: 1
Views: 1,496
Posted By jeff5may
Before you start throwing down anything, get a...

Before you start throwing down anything, get a soil test done. If you have desparately separate zones, test them separately. This is without a doubt the step most people forget or dismiss. How do you...
Forum: Solar Power 03-21-21, 10:46 PM
Replies: 9
Views: 1,842
Posted By jeff5may
Ok, don't hesitate to post it up on the other...

Ok, don't hesitate to post it up on the other thread whenever you do something with it. I'll sure offer any help I can. Most all of the inverter mini splits have muscles in them like front load...
Forum: Appliances & Gadgets 03-21-21, 04:43 PM
Replies: 18
Views: 3,468
Posted By jeff5may
I just went a couple of rounds with a...

I just went a couple of rounds with a mobo/processor/memory rig like that. I believe it was the same processor, maybe not the k version. Intel desktop board with a skull on it. The eyes light up to...
Forum: Solar Heating 03-21-21, 05:26 AM
Replies: 8
Views: 2,777
Posted By jeff5may
We finally got a clear day that wasn't windy. I...

We finally got a clear day that wasn't windy. I got the small one about whipped together today. A buddy had a bunch of wood shelving this week, and I grabbed half a truckload of it from him. So the...
Forum: Solar Power 03-21-21, 04:49 AM
Replies: 9
Views: 1,842
Posted By jeff5may
Check with a local electrician, different states...

Check with a local electrician, different states have different rules for what's gotta hookup how. Many wiring possibilities and only a few approved layouts. Plus it's high voltage utility power. I...
Forum: Solar Power 03-18-21, 02:08 PM
Replies: 56
Views: 67,936
Posted By jeff5may
I don't know why I didn't check on this thread...

I don't know why I didn't check on this thread over the years. I actually tried out a couple of experimental rigs using this principle, and they both worked.

The first setup was built in one day...
Forum: Solar Heating 03-13-21, 10:35 PM
Replies: 8
Views: 2,777
Posted By jeff5may
Nope, not trying to do a copper skeleton and roll...

Nope, not trying to do a copper skeleton and roll form or solder or both. If it was going on a roof, if it was meant to last 50 years, if I had a big budget... Maybe. Too high speed high cost for my...
Showing results 1 to 25 of 500

 
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