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Search: Posts Made By: jeff5may
Forum: Tools 02-10-21, 10:16 PM
Replies: 15
Views: 540
Posted By jeff5may
Nice! You got a steal on that one.

Nice! You got a steal on that one.
Forum: Other Improvements 02-10-21, 02:36 AM
Replies: 18
Views: 728
Posted By jeff5may
Ad hominem, hahaha now I really feel old! I...

Ad hominem, hahaha now I really feel old! I apologise if I hurt you somehow trying to offer practical suggestions. See ya round, good luck in your endeavors.
Forum: Other Improvements 02-09-21, 03:49 PM
Replies: 18
Views: 728
Posted By jeff5may
Next, the pv solar. Your sunpower panels are...

Next, the pv solar. Your sunpower panels are rated at 200 watts per square meter, peak output. Going with your 4 hours of sun per day, this gives you an average figure of 33⅓ watts per square meter....
Forum: Other Improvements 02-08-21, 10:43 PM
Replies: 18
Views: 728
Posted By jeff5may
I'm not the guy who will arm wrestle you in the...

I'm not the guy who will arm wrestle you in the armchair over a keyboard. Go ahead and believe the regional sales executive on salary vs commission, and the program they wrote to keep you from being...
Forum: Conservation 02-08-21, 02:46 AM
Replies: 3
Views: 1,310
Posted By jeff5may
Redox flow batteries have been around a long...

Redox flow batteries have been around a long time. They work. Problem is that they have low energy density and low current density. You can run lead-acid batteries this way. Just change the acid.
...
Forum: Other Improvements 02-07-21, 02:41 PM
Replies: 18
Views: 728
Posted By jeff5may
So much in one post to respond to, what next? ...

So much in one post to respond to, what next? The HRV.

You need to be using a dehumidifier or refrigerator compressor for the HRV for a single family home or smaller dwelling. The figure is for...
Forum: Other Improvements 02-07-21, 02:15 PM
Replies: 18
Views: 728
Posted By jeff5may
I'm repeating common, industry standard,...

I'm repeating common, industry standard, optimistic figures for your benefit. For example, the 25 watts per sqft figure is a well researched average daily value. The sun doesn't shine at 100% when...
Forum: Other Improvements 02-02-21, 12:39 PM
Replies: 18
Views: 728
Posted By jeff5may
Chemical energy storage is somewhat less dense...

Chemical energy storage is somewhat less dense than the source. Megajoules per kilogram is the metric. As expected, burning liquified petroleum gas is pretty dense, around 50. Liion batteries come in...
Forum: Solar Heating 02-01-21, 06:31 AM
Replies: 25
Views: 2,242
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, 06:52 PM
Replies: 25
Views: 2,242
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 01-19-21, 11:44 PM
Replies: 14
Views: 4,467
Posted By jeff5may
I had to go google for a minute to figure out...

I had to go google for a minute to figure out what a esp12 was. Doh, it's the same 8266, stripped down. Does it even have a status LED? For 3 bucks shipped to my house, anything more than an...
Forum: Geothermal & Heat Pumps 01-19-21, 11:36 AM
Replies: 14
Views: 4,467
Posted By jeff5may
Tyvm! I've been looking at the original version...

Tyvm! I've been looking at the original version for awhile now, I think I have a good grip on the overall operation. Haven't dug deep inside subroutines to see exactly where the rubber hits the road,...
Forum: Geothermal & Heat Pumps 01-18-21, 04:45 PM
Replies: 14
Views: 4,467
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: Geothermal & Heat Pumps 01-17-21, 09:07 PM
Replies: 18
Views: 1,716
Posted By jeff5may
For domestic hot water heating, there are a few...

For domestic hot water heating, there are a few ways to go. You don't need a big heat pump. A few ecorenovators have made heat pump water heaters out of dehumidifiers. Randen made one out of a 5kbtu...
Forum: Geothermal & Heat Pumps 01-16-21, 01:43 PM
Replies: 4
Views: 1,836
Posted By jeff5may
I know. It was difficult for me to let go of the...

I know. It was difficult for me to let go of the idea. Keeping it simple was the hard part: everyone wanted to upgrade the basic control to tailor it to their personal site. I stuck with an Arduino...
Forum: Geothermal & Heat Pumps 01-16-21, 12:05 PM
Replies: 4
Views: 1,836
Posted By jeff5may
I've settled on the Trane American standard...

I've settled on the Trane American standard defrost model for control. Works like magic. The real one starts out with model number cnt5001 and has been revised over the years. Current model number is...
Forum: Solar Heating 01-10-21, 08:26 PM
Replies: 14
Views: 765
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 01-08-21, 08:38 PM
Replies: 93
Views: 24,329
Posted By jeff5may
Use one of the Gargantuan computer case fans. 15...

Use one of the Gargantuan computer case fans. 15 bucks for an 8 inch, moves somewhere around 100 CFM with a little back pressure. Sooper quiet, ultra low power, but they only produce a millimeter or...
Forum: Solar Heating 01-06-21, 03:05 PM
Replies: 219
Views: 113,545
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: Geothermal & Heat Pumps 01-02-21, 04:25 PM
Replies: 3
Views: 430
Posted By jeff5may
So, ignoring the residential HVAC industry's...

So, ignoring the residential HVAC industry's reluctance towards anything with "freon" outside "the magic box", a DX ground loop is no more difficult to construct than a glycol or water based ground...
Forum: Solar Heating 12-31-20, 11:47 PM
Replies: 6
Views: 589
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: Solar Heating 12-31-20, 11:22 PM
Replies: 25
Views: 2,242
Posted By jeff5may
Ok, so with your setup and goals in mind, I would...

Ok, so with your setup and goals in mind, I would recommend a smallish hot loop with glycol, non-drainback. Maybe 15 to 20 gallons max to go to and from the collector. Either a brazed plate heat...
Forum: Solar Heating 12-31-20, 12:44 AM
Replies: 13
Views: 1,373
Posted By jeff5may
Sorry, got busy living. As correctly speculated,...

Sorry, got busy living. As correctly speculated, the main concern relates to loss of power/pump events. Some e-tube collector models are designed and tested to withstand the 150 degC stagnation...
Forum: Geothermal & Heat Pumps 12-30-20, 02:55 PM
Replies: 3
Views: 430
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, 12:24 PM
Replies: 3
Views: 430
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...
Showing results 1 to 25 of 500

 
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