fha772
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| posted on 21/10/13 at 02:17 PM |
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Does anyone know about solar water heater panels?
Hi all,
It's looking like I will be buying a yard in the next few months.
I'm planing to build a Dutch barn type building to store some equipment in, out if the weather.
They'll also be a porta cabin type site office/welfare unit, in the yard.
What I've been thinking about is heating for the site office.
I was thinking of having some solar water heating panels on the roof of the big building, as this will be south facing.
And just hook these up to several radiators in the site office, in a closed loop with a central heating pump to circulate the water.
This is mainly to just keep it aired out, and maybe just a small electric blow heater for when it's really cold.
I was just wondering what I can expect from these panels in the dead of winter, if the water is circulating full time, will this alone keep the office
at a reasonable temperature?
The office won't be used full time, it is actually just somewhere to have a wash room, and to sit and have a mug of tea.
I'm planning to make my own panels, unless I can find some 2nd hand ones on the bay of e.
Any advice would be great.
Cheers Frank.
http://www.ppcmag.co.uk/forum/viewtopic.php?f=47&t=6743&start=105
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Bluemoon
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| posted on 21/10/13 at 02:37 PM |
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http://www.dimplex.co.uk/products/renewable_solutions/solar_water_heating/faq.htm
..
The problem is you will only get hot water when the sun is out  That's not when you need the heating...
Wikipeda suggests a direct air system might be a lo-cost solution:
http://en.wikipedia.org/wiki/Solar_thermal_collector
http://en.wikipedia.org/wiki/Solar_air_heat
i.e. large black plate under double glazing??? With a fan to move the air..
Again it's will work best only in the summer (;
Dan
[Edited on 21/10/13 by Bluemoon]
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fha772
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| posted on 21/10/13 at 02:44 PM |
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I know that, I'm just trying to keep the office from freezing up in the winter, during the summer, I was going to drain the system and leave it
off, it'll be well insulated, as I've been offered an old freezer body to convert, so all the walls will be about 5-6 thick solid foam
insulation, and I'm only planning to have 1 window and a single door.
http://www.ppcmag.co.uk/forum/viewtopic.php?f=47&t=6743&start=105
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BenB
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| posted on 21/10/13 at 03:29 PM |
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We use them at work but for hot water- lots of hand washing round our place so it makes sense. Next is some nice PV cells- we're only open
during the daytime so most of the time when the lights are on the sun is shining (even if its only shining above the clouds!).....
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Andy S
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| posted on 21/10/13 at 05:46 PM |
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Unfortunately it is not likely to work. With a pump running all the time its more likely that you will take the cold from outside and bring it inside
creating nice rad panels of condensation.
A standard solar panel system circuit only works and pumps when the panels hit a temperature to provide useful heat - If there is enough useful heat
on the roof then the building will be typically warm enough anyway. i.e not going to happen in winter.
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big-vee-twin
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| posted on 21/10/13 at 07:19 PM |
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What happens when it snows, when you most want heating?
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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Andy S
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| posted on 21/10/13 at 07:38 PM |
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quote:
Originally posted by big-vee-twin
What happens when it snows, when you most want heating?
You turn on the electric fan heater and wish you had saved the money wasted on the solar system to help pay the electric bill 
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carpmart
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| posted on 22/10/13 at 04:09 PM |
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quote:
Originally posted by Andy S
quote:
Originally posted by big-vee-twin
What happens when it snows, when you most want heating?
You turn on the electric fan heater and wish you had saved the money wasted on the solar system to help pay the electric bill
LOL
You only live once - make the most of it!
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'94 MX5 MK1, 1.8
F10 M5 - 600bhp Daily Hack 
Range Rover Sport - Wife's Car
Mercedes A class - Son's Car
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russbost
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| posted on 22/10/13 at 05:12 PM |
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If it's well insulated & you just want general background heat would a cheap(ish) inverter heat pump not be adequate, you can get them from
around £400 & they cost a lot less than an standard electric heater to run (around 1/2 to 1/3 depending how cold it is outside)
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