Forum: Energy Storage
10-22-23, 04:37 PM
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Replies: 34
Views: 175,194
Makes you wonder how long a heat trap is...
Makes you wonder how long a heat trap is required, perhaps duplicate what you have and place two next to each other; or add another flapper check valve in the cold line entry into the tank.
Simple...
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Forum: Energy Storage
10-05-22, 08:37 PM
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Replies: 34
Views: 175,194
Perhaps your swing valve is not sealing fully...
Perhaps your swing valve is not sealing fully when closed, there must be enough getting past it to keep the water moving.
When the sun goes down and its a clear night, the water in the panels can...
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Forum: Energy Storage
10-04-22, 04:30 PM
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Replies: 34
Views: 175,194
Swing flapper valve must be operated with the...
Swing flapper valve must be operated with the valve disk vertical, eg whole valve body is horizontal, for low pressure pumps.
To ensure the flapper disk seats correctly I mounted mine at a slight...
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Forum: Solar Heating
03-13-22, 11:22 PM
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Replies: 8
Views: 29,392
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Forum: Energy Storage
03-13-22, 11:15 PM
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Replies: 34
Views: 175,194
Had the same issue when I built my flat plate...
Had the same issue when I built my flat plate Solar Hot Water panels and mounted them on the roof, on a cold night the quick lowering of water temperature in the panels would initiate reverse...
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Forum: Energy Storage
03-13-22, 11:03 PM
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Replies: 6
Views: 21,283
A friend was building up a 24V power wall using...
A friend was building up a 24V power wall using old laptop battery cells, don't think he ever finished it, needed hundreds of cells, having to sort them out first to even up capacity, then join them...
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Forum: Biofuels
02-14-22, 12:42 PM
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Replies: 9
Views: 18,804
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Forum: Biofuels
02-13-22, 10:36 PM
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Replies: 9
Views: 18,804
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Forum: Solar Heating
09-27-21, 05:14 AM
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Replies: 8
Views: 29,392
Have built a few of these controllers over the...
Have built a few of these controllers over the years, you need a min. of 2 sensors for differential control, plus a setting for the min. pump on differential, usually about 3-4 degrees Celsius, as...
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Forum: Appliances & Gadgets
12-24-15, 02:14 AM
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Replies: 7
Views: 7,664
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Forum: Lawn and Garden
09-10-15, 10:51 PM
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Replies: 13
Views: 31,270
Carbon Neutral
Sorry incorrect, when logs decompose or rot on the forest floor, their carbon is released by bacteria etc, just takes longer than burning it. Science behind this is called "The Carbon Cycle", used to...
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Forum: Solar Power
07-14-14, 07:52 PM
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Replies: 9
Views: 6,910
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Forum: Solar Power
05-15-14, 06:51 AM
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Replies: 39
Views: 29,158
You can get DC SSR that have mosfets in them,...
You can get DC SSR that have mosfets in them, they still use the opto isolator and are specifically designed to switch DC sourced loads on and off, readily available on aliexpress for similar prices...
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Forum: Solar Heating
02-11-12, 04:07 AM
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Replies: 15
Views: 17,079
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Forum: Solar Heating
02-09-12, 05:02 PM
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Replies: 15
Views: 17,079
I have a standard vacuum pump goes down < 50...
I have a standard vacuum pump goes down < 50 microns, standard multi way connection hub and hoses etc and a digital gauge so you can measure it with any accuracy.
As the amount of liquid gas in...
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Forum: Solar Heating
02-09-12, 02:44 PM
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Replies: 15
Views: 17,079
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Forum: Solar Heating
02-09-12, 04:11 AM
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Replies: 15
Views: 17,079
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Forum: The Billiards Room
01-31-12, 04:58 AM
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Replies: 7
Views: 6,804
Reminds me many years ago when NZ was in the...
Reminds me many years ago when NZ was in the throes of switching over from imperial to metric, a certain Govt science laboratory was getting a new lab built, the room length stainless steel bench top...
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Forum: Appliances & Gadgets
09-29-11, 05:56 AM
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Replies: 24
Views: 30,133
I have a pellet stove wood burner, it has an...
I have a pellet stove wood burner, it has an external air tube to the fire box. This allows the air to be sourced external to the building; if the building is a mobile home or otherwise tightly...
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Forum: Solar Heating
09-12-11, 06:04 AM
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Replies: 4
Views: 5,532
These are designed for low temperatures with...
These are designed for low temperatures with enough water flow to prevent any great temperature rise, thus making them very efficient and not requiring housing in a box with glazing etc.
The...
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Forum: Solar Heating
09-06-11, 08:03 PM
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Replies: 5
Views: 9,469
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Forum: Solar Heating
08-22-11, 11:27 PM
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Replies: 5
Views: 6,598
Air heating panels should have sufficient air...
Air heating panels should have sufficient air flowing through them so the heated air is only a few degrees (say 10) above the incoming cold supply air. This gains max efficiency from the panel and is...
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Forum: Solar Heating
07-17-11, 11:50 PM
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Replies: 67
Views: 51,721
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Forum: Solar Heating
06-13-11, 11:14 PM
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Replies: 14
Views: 19,688
Hi Gary
Your collectors will be fine, the...
Hi Gary
Your collectors will be fine, the silicon, acting as a thin flexible bonding agent once set will still allow some differential expansion whilst keeping the fins stuck to the risers,...
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Forum: Solar Heating
06-13-11, 03:15 AM
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Replies: 14
Views: 19,688
Hi
I have made many types of solar hot water...
Hi
I have made many types of solar hot water collectors over the past 5 years or so, generally I have found its easier to use thin copper foil (0.25mm thick) fins soldered to the risers than using...
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