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Search: Posts Made By: jeff5may
Forum: Solar Heating 08-08-21, 03:56 PM
Replies: 8
Views: 2,556
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, 03:45 PM
Replies: 8
Views: 2,556
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, 05:46 PM
Replies: 3
Views: 905
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: Geothermal & Heat Pumps 07-30-21, 11:00 AM
Replies: 5
Views: 708
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, 09:12 AM
Replies: 2
Views: 1,378
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, 08:37 PM
Replies: 9
Views: 1,282
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 06-13-21, 11:33 PM
Replies: 4
Views: 1,133
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: Solar Heating 02-01-21, 05:31 AM
Replies: 25
Views: 5,783
Posted By jeff5may
IamIan, Take a gander on this discussion group....

IamIan,
Take a gander on this discussion group. Geothermal forum. Probably half a dozen build threads where members have rolled their own. My favorites are Randy and Jake (randen, memphis). Randy...
Forum: Solar Heating 01-30-21, 05:52 PM
Replies: 25
Views: 5,783
Posted By jeff5may
Better hurry up before the dollar implodes. Your...

Better hurry up before the dollar implodes. Your retirement account might need another zero on it before you can retire. Mr president is already on with the rhetoric: more stimulus, more spending,...
Forum: Geothermal & Heat Pumps 01-18-21, 03:45 PM
Replies: 14
Views: 7,777
Posted By jeff5may
Ok so I decided to post in this thread as not to...

Ok so I decided to post in this thread as not to pollute the other, newer version thread.

I've recently been tinkering with more phase change monsters and have decided to have another go at the...
Forum: Solar Heating 01-10-21, 07:26 PM
Replies: 14
Views: 2,870
Posted By jeff5may
Main idea is: if it's working, play with it until...

Main idea is: if it's working, play with it until you make it short cycle. Then dial it back until it doesn't. Pick a sweet spot and drive it like you stole it.
Forum: Solar Heating 01-06-21, 02:05 PM
Replies: 219
Views: 128,609
Posted By jeff5may
The spring loaded check valves work pretty well....

The spring loaded check valves work pretty well. The ones without a rubber seal are cheaper than the ones with the seal. Easy peasy breezy. Any orientation installation for quick and simple.
Forum: Solar Heating 12-31-20, 10:47 PM
Replies: 6
Views: 1,843
Posted By jeff5may
Just about all the systems that I've seen that...

Just about all the systems that I've seen that actually work well use the second method you describe. Small e-tube collector loop volume, exchanging heat into a larger tank, usually insulated well.
Forum: Geothermal & Heat Pumps 12-30-20, 01:55 PM
Replies: 3
Views: 1,751
Posted By jeff5may
So with an understanding of the overall heat pump...

So with an understanding of the overall heat pump refrigeration cycle, I will focus on the geothermal/ground source end of the system.

With a ground loop based system, the two main things that...
Forum: Geothermal & Heat Pumps 12-30-20, 11:24 AM
Replies: 3
Views: 1,751
Posted By jeff5may
Ok so a little background on the phase change...

Ok so a little background on the phase change heating and cooling system first.

Any air conditioning or heating system that relies on the phase change system moves heat via mass flow of...
Forum: Solar Heating 09-21-20, 12:33 PM
Replies: 13
Views: 3,603
Posted By jeff5may
Drain back is not generally recommended with...

Drain back is not generally recommended with evacuated tube collectors. Mainly two reasons:
First, stagnation temperature can literally melt down gasket and sealing materials. When the sun shines...
Forum: Renovations & New Construction 09-08-20, 03:01 PM
Replies: 8
Views: 4,614
Posted By jeff5may
My guess is Bob diy'd a solution 3 years ago.

My guess is Bob diy'd a solution 3 years ago.
Forum: Geothermal & Heat Pumps 08-16-20, 09:11 AM
Replies: 20
Views: 6,658
Posted By jeff5may
Yes, the spot with the black circle is a good...

Yes, the spot with the black circle is a good place to attach one wire of the fuse holder. Just apply the heat to the terminal until it melts, it probably has unleaded solder in the board. The...
Forum: Conservation 07-31-20, 08:10 AM
Replies: 8
Views: 3,242
Posted By jeff5may
Oh no, we're talking about refrigerators with...

Oh no, we're talking about refrigerators with compartment cams (so you can check at the grocery store if you have any cold beer left), with the ability to assemble shopping lists for you...
Forum: Geothermal & Heat Pumps 07-23-20, 01:22 AM
Replies: 20
Views: 6,658
Posted By jeff5may
For what it's worth, I have a gaggle of teensy...

For what it's worth, I have a gaggle of teensy soldering stuff for electronics. My go to is the Weller. All the super pro somewhat expert peanuts have their gadgets of the day, but guess what? Weller...
Forum: Geothermal & Heat Pumps 06-30-20, 02:05 AM
Replies: 15
Views: 4,856
Posted By jeff5may
Yes, ventilation will help carry away waste heat....

Yes, ventilation will help carry away waste heat. Not a huge amount, but yes it will be helpful.

The most effective thing you can do to increase cooling is to mist the outdoor unit heat exchanger....
Forum: Geothermal & Heat Pumps 06-24-20, 08:30 AM
Replies: 20
Views: 6,658
Posted By jeff5may
If you didn't submit registration paperwork, your...

If you didn't submit registration paperwork, your warranty is moot. It had to have been given a thumbs up by a licensed HVAC tech and submitted within 90 days. The approving tech is supposed to put a...
Forum: For Sale / Trade / Wanted / Web Finds 06-24-20, 08:08 AM
Replies: 2
Views: 2,636
Posted By jeff5may
https://sunelec.com/shop/solar-panels/used-70-watt...

https://sunelec.com/shop/solar-panels/used-70-watt-thin-film-modules/

And here's the panel specs:

https://www.enfsolar.com/pv/panel-datasheet/Thin-film/1018
Forum: Solar Heating 06-13-20, 11:16 PM
Replies: 14
Views: 4,826
Posted By jeff5may
Ok so there are a few ways you can go about...

Ok so there are a few ways you can go about refurbishing the panels. Your ultimate decision will be determined by the purpose and ease of maintenance of the system.

Choice number one: never...
Forum: Geothermal & Heat Pumps 06-07-20, 10:43 AM
Replies: 48
Views: 13,495
Posted By jeff5may
Not trying to resurrect a zombie thread here, but...

Not trying to resurrect a zombie thread here, but I happened upon a YouTuber who has built his own desiccant air conditioner. If this link dies, search for Tech ingredients solar air conditioner.
...
Showing results 1 to 25 of 500

 
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