Forum: Appliances & Gadgets
12-24-15, 03:14 AM
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Replies: 7
Views: 2,590
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Forum: Lawn and Garden
09-10-15, 11:51 PM
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Replies: 13
Views: 4,483
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, 08:52 PM
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Replies: 9
Views: 2,152
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Forum: Solar Power
05-15-14, 07:51 AM
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Replies: 39
Views: 9,812
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, 05:07 AM
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Replies: 15
Views: 7,664
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Forum: Solar Heating
02-09-12, 06:02 PM
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Replies: 15
Views: 7,664
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, 03:44 PM
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Replies: 15
Views: 7,664
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Forum: Solar Heating
02-09-12, 05:11 AM
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Replies: 15
Views: 7,664
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Forum: The Billiards Room
01-31-12, 05:58 AM
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Replies: 7
Views: 3,525
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, 06:56 AM
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Replies: 24
Views: 17,876
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, 07:04 AM
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Replies: 4
Views: 2,022
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, 09:03 PM
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Replies: 5
Views: 5,389
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Forum: Solar Heating
08-23-11, 12:27 AM
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Replies: 5
Views: 2,589
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
07-18-11, 12:50 AM
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Replies: 67
Views: 24,666
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Forum: Solar Heating
06-14-11, 12:14 AM
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Replies: 14
Views: 12,257
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, 04:15 AM
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Replies: 14
Views: 12,257
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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Forum: Solar Power
03-09-11, 06:36 PM
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Replies: 37
Views: 27,156
This has happened here, except the cables were...
This has happened here, except the cables were live at the time securely mounted atop 30' poles, several kms were stolen. Dairy farmer went out to milk his cows at 5am and discovered milking shed had...
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Forum: Solar Power
03-09-11, 05:58 AM
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Replies: 37
Views: 27,156
Re: electrocuting the linesman
I was taught to...
Re: electrocuting the linesman
I was taught to put earthing clamps on the lines being worked on, thus any back feed or some idiot turning the system on would not kill off the workers. Dont know how...
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Forum: Solar Heating
02-07-11, 03:50 AM
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Replies: 14
Views: 5,088
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Forum: Solar Heating
01-24-11, 06:21 PM
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Replies: 4
Views: 5,274
If the plate is roll corrugated aluminum or...
If the plate is roll corrugated aluminum or similar, painted flat black on both faces then as aluminum is a good thermal conductor both sides will be equally hot. Thus allow the air to flow over both...
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Forum: Lighting
12-17-10, 03:51 PM
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Replies: 16
Views: 8,537
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Forum: Solar Power
10-19-10, 08:45 PM
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Replies: 20
Views: 19,619
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Forum: Wind Power
10-15-10, 11:54 PM
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Replies: 8
Views: 4,138
I agree with other posters, Sam's will be lucky...
I agree with other posters, Sam's will be lucky to get 5% pa. of rated power output from such an installation, in other words an absolute waste of money. Perhaps if they had spent the same amount on...
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Forum: Lighting
10-15-10, 04:39 AM
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Replies: 12
Views: 7,361
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Forum: Solar Heating
09-25-10, 09:19 PM
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Replies: 8
Views: 4,862
In the winter, its all about total surface area...
In the winter, its all about total surface area to capture the heat, whilst vac tubes have less losses than a flat collector, they don't have a lot of surface area so you will need lots of them. Also...
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