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Search: Posts Made By: Piwoslaw
Forum: Geothermal & Heat Pumps 07-31-24, 12:53 AM
Replies: 0
Views: 13,849
Posted By Piwoslaw
Dual source heat pump

We all know of the ups and downs of both air source, and ground source heat pumps.
Imagine you go with the investment in GSHP, and then you notice that during the heating season you have quite a few...
Forum: Solar Power 06-25-24, 08:24 AM
Replies: 1
Views: 19,276
Posted By Piwoslaw
PV Inverter wiring question

Our 2.7kW PV system has 8 panels connected in series to a 3kW single-phase SolarEdge inverter. The existing panels are registered with the inverter during set up, so I can see each panel's output in...
Forum: Energy Storage 06-07-24, 02:24 AM
Replies: 7
Views: 37,122
Posted By Piwoslaw
So I came accross this article in PV Magazine...

So I came accross this article in PV Magazine (https://www.pv-magazine.com/2021/06/21/concrete-flywheel-storage-system-for-residential-pv/), about a French start-up 'Energiestro' working on...
Forum: Energy Storage 04-09-24, 01:34 AM
Replies: 1
Views: 14,284
Posted By Piwoslaw
Yes, there is interest! Just a few months...

Yes, there is interest!

Just a few months ago I was reading about long-term heat storage in the soil under buildings.

One fellow stated that before pouring the foundations he buried some...
Forum: Appliances & Gadgets 12-12-23, 07:37 AM
Replies: 5
Views: 60,653
Posted By Piwoslaw
If I were to invest more into this idea, I would...

If I were to invest more into this idea, I would experiment with a squirrel cage fan, but with a looong fan, like this:
https://ecorenovator.org/forum/attachment.php?attachmentid=9498&d=1702387800...
Forum: Energy Storage 12-12-23, 02:39 AM
Replies: 34
Views: 181,146
Posted By Piwoslaw
I added the heat trap and flap valve to the...

I added the heat trap and flap valve to the return from the house:
https://ecorenovator.org/forum/attachment.php?attachmentid=9497&d=1702369586

The additional resistance is evident from the...
Forum: Appliances & Gadgets 12-12-23, 02:15 AM
Replies: 5
Views: 60,653
Posted By Piwoslaw
I once started a discussion about increasing the...

I once started a discussion about increasing the efficiency of my heating system by lowering its temperature:
How to lower heating system temperature?...
Forum: Appliances & Gadgets 12-05-23, 07:28 AM
Replies: 159
Views: 349,297
Posted By Piwoslaw
I'm not that good with electrical motors, but I...

I'm not that good with electrical motors, but I think there might be at least 4 reasons:

Required precision of making/keeping the wheel's rim true, as mentioned above,
Keeping the magnets and...
Forum: Energy Storage 11-27-23, 12:25 PM
Replies: 34
Views: 181,146
Posted By Piwoslaw
Well, technically, I'd be losing more heat then,...

Well, technically, I'd be losing more heat then, at least until it cooled enough to stop the flow ;)

In fact, it is insulated pretty well, so a fan wouldn't do much.

I read here...
Forum: Energy Storage 11-08-23, 01:50 PM
Replies: 34
Views: 181,146
Posted By Piwoslaw
Wondering about the following: In all diagrams of...

Wondering about the following: In all diagrams of heat traps, the water at the top of the trap is as hot as in the top of the tank, and its temperature goes down as you get lower, so that in the part...
Forum: Energy Storage 11-04-23, 02:13 PM
Replies: 4
Views: 31,170
Posted By Piwoslaw
Read a bit more on these. Turns out they can...

Read a bit more on these. Turns out they can switch between storing and producing energy very quickly, reaction time below 1 second. Many other types of batteries need to "rest" in between cycles to...
Forum: Energy Storage 10-22-23, 12:16 AM
Replies: 34
Views: 181,146
Posted By Piwoslaw
This summer I reworked the heat trap plumbing on...

This summer I reworked the heat trap plumbing on the hot side, extending it first barely above the top of the tank (can't go higher due to low ceiling) then down almost to the cold input:...
Forum: Conservation 10-03-23, 12:15 PM
Replies: 3
Views: 71,398
Posted By Piwoslaw
Good question! The water in pipes will have a...

Good question!
The water in pipes will have a temperature of 40-70 deg C, while the basement is usually 15 deg c. I don't mind if the basement warms up by 1 or 2 deg, but don't want the water to...
Forum: Conservation 09-30-23, 01:45 PM
Replies: 3
Views: 71,398
Posted By Piwoslaw
How to insulate valves, filters, etc.

I am trying to better insulate my heat buffer, and the heating system's plumbing in general. Adding another layer of foam insulation and stuff like that.

But there are parts which are more...
Forum: Other Improvements 08-05-23, 02:07 PM
Replies: 1
Views: 63,426
Posted By Piwoslaw
Looks cool :cool: But I wonder how long...

Looks cool :cool:

But I wonder how long those hoses and connections will last if they are constantly bending in the salt and UV?
Something purely mechanical might last longer.

Wave power has...
Forum: Energy Storage 08-05-23, 01:59 PM
Replies: 4
Views: 26,400
Posted By Piwoslaw
Energy storage for PV/wind? I doubt they...

Energy storage for PV/wind?

I doubt they would be good for extending the range of an EV...
Forum: Appliances & Gadgets 07-17-23, 01:01 PM
Replies: 2
Views: 26,396
Posted By Piwoslaw
Screw-in heat exchanger

I once came across a picture of a HX like this
https://ecorenovator.org/forum/attachment.php?attachmentid=9490&d=1689616596

This would be good to screw into one of the 2" ports of my heat buffer...
Forum: Conservation 05-28-23, 01:45 PM
Replies: 6
Views: 67,949
Posted By Piwoslaw
Instead of completely disconnecting, could you...

Instead of completely disconnecting, could you add an additional thermostat in series, so it still turns on, but at a lower temp.
Or instead of a manual 2-postion switch, use a 3-position switch for...
Forum: Energy Storage 05-19-23, 11:53 PM
Replies: 19
Views: 47,441
Posted By Piwoslaw
I got this idea about small scale pumped hydro...

I got this idea about small scale pumped hydro yesterday.
Instead of pumping water above the surface to store energy, why not pump it to the surface?
I'm thinking about a well, and wells can be...
Forum: Energy Storage 10-05-22, 12:14 PM
Replies: 34
Views: 181,146
Posted By Piwoslaw
Update: Last weekend I mounted the valve...

Update:
Last weekend I mounted the valve vertically (position #2 a few posts up), so that the weight of the flap holds back the flow when the pump is off. In fact, I even added a few washers to the...
Forum: Energy Storage 09-25-22, 01:05 PM
Replies: 34
Views: 181,146
Posted By Piwoslaw
I made the heat trap which dips almost all the...

I made the heat trap which dips almost all the way to the bottom of the tank:
https://ecorenovator.org/forum/attachment.php?attachmentid=9471&d=1664128136
Unfortunately, heat is still being sucked...
Forum: Appliances & Gadgets 07-31-22, 05:42 AM
Replies: 2
Views: 59,442
Posted By Piwoslaw
Old 6V battery - still good?

Helping family clean their house I found a 6V 4Ah sealed lead acid battery. Family said they don't need it, so I took it for some projects.

The label states the voltage should be 7.2-7.5V, but at...
Forum: Renovations & New Construction 07-07-22, 01:15 PM
Replies: 10
Views: 63,086
Posted By Piwoslaw
Wow:eek: I never thought about hot the...

Wow:eek:
I never thought about hot the underground water line can get.

Not sure how long a run you have on your property, but maybe laying the main deeper under ground? It would be a bit cooler...
Forum: Other Improvements 05-09-22, 01:51 PM
Replies: 1
Views: 19,500
Posted By Piwoslaw
Screen door - need advice

A long time ago I made screens to put on the windows during mosquito season, now I would like to make a screen for the balcony door also.

The frames of the window screens are just simple...
Forum: Energy Storage 04-27-22, 02:46 PM
Replies: 34
Views: 181,146
Posted By Piwoslaw
Update. I read about heat traps and concocted...

Update.
I read about heat traps and concocted something like this:
https://ecorenovator.org/forum/attachment.php?attachmentid=9453&stc=1&d=1651087611
The heat trap goes up ~35cm, then down ~20cm,...
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