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DIY Solar Panels
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rool



Joined: 19 Mar 2007
Posts: 14


Location: South Limerick

PostPosted: Thu Mar 22, 2007 2:47 pm    Post subject: DIY Solar Panels Reply with quote

Is anyone handy enough to have tried these:-

http://www.bigginhill.co.uk/solar.htm


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keithrawlins



Joined: 18 Feb 2007
Posts: 152


Location: banbridge

PostPosted: Thu Mar 22, 2007 4:49 pm    Post subject: Reply with quote

not yet but thanks to your link i will be this summer, the thing seems prety easy to make,(ishouldent have said that its going to be a nightmare now)
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JayBee



Joined: 28 Apr 2007
Posts: 21


Location: Kerry (but really a Kilkenny Cat)

PostPosted: Sat Apr 28, 2007 9:29 pm    Post subject: Reply with quote

I'm about to start work on a solar water heater myself.

I'll be using the design detailed on the Mother Earth News website.

http://www.motherearthnews.com/Gr...01/Mothers-In-Line-Collector.aspx

Even though there is a grant for the evacuated tube solar water heater I still won't buy any. The reduced price still smells of a big middle-man mark-up.
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http://the-goodlife.blogspot.com
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wayland



Joined: 14 Dec 2006
Posts: 1171


Location: Campile. Wexford

PostPosted: Sun Apr 29, 2007 11:12 am    Post subject: Reply with quote

Interesting thought. I like the evacuated tube design and it aint rocket science to build. Once we have found some glass tubes that is. I thought of recycling florescent tubes but fear that the glass is too thin. As to the grant etc. I may well use it but will have to do some costings first. They are much cheaper in the UK of course.
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JayBee



Joined: 28 Apr 2007
Posts: 21


Location: Kerry (but really a Kilkenny Cat)

PostPosted: Tue May 08, 2007 7:57 pm    Post subject: Reply with quote

I've started work on my simple solar water heater.

You can see the progress on my blog - http://the-goodlife.blogspot.com/search/label/solar%20heating

Depending on the results from the prototype I will build a series of these to provide for all summer hot water needs.

For winter hot water I am working on wood gasification, which you can read about here - http://the-goodlife.blogspot.com/search/label/wood%20gas
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James

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wayland



Joined: 14 Dec 2006
Posts: 1171


Location: Campile. Wexford

PostPosted: Wed May 09, 2007 6:16 am    Post subject: Reply with quote

Nice one James. I notice with the commercial arrays the need for a pressure relief valve in case the fluid boils. do you think that your system has this risk?
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JayBee



Joined: 28 Apr 2007
Posts: 21


Location: Kerry (but really a Kilkenny Cat)

PostPosted: Wed May 09, 2007 9:06 am    Post subject: Reply with quote

wayland wrote:
Nice one James. I notice with the commercial arrays the need for a pressure relief valve in case the fluid boils. do you think that your system has this risk?


Boiling could be a problem. Definitely with my wood gasifier which gets up to 600C where any water pipes/jacket may reside.

My solar array would have a relief in the second hot water cylinder I shall install. Also a pressure relief could be installed almost anywhere.

For now, the array will be tested as a thermosiphon depositing hot water into an open tank. This will allow me to monitor what is going on more easily.
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wayland



Joined: 14 Dec 2006
Posts: 1171


Location: Campile. Wexford

PostPosted: Thu May 10, 2007 5:22 pm    Post subject: Reply with quote

I think I shall have mine pumped by a vairable speed pump. With a stat fitted I would be more comfortable in the knowledge that if the water got to boiling point, the pump would go up a notch and dump the hot water more quickly. Keep us posted Wink
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JayBee



Joined: 28 Apr 2007
Posts: 21


Location: Kerry (but really a Kilkenny Cat)

PostPosted: Thu May 10, 2007 5:27 pm    Post subject: Reply with quote

My first solar heating panel is now complete.

I've posted annotated photos to Picasa.

http://picasaweb.google.co.uk/butler.jm/SolarWaterHeater

No water in it yet. I need a few more fittings from JRs before I connect it to a small test tank.

However, I left it out in the sun and took readings with my IR thermometer. The collector plate touched 60C after 15 minutes in the sun. The unlagged output pipe was at 35C. There is currently no insulation behind the collector.

Total cost so far is about 35 yoyos. Some of the copper pipe, all the wood and fixings are of "obtainium" thus free.

I think boiling point water is not feasible with these designs. I regard it as more of a pre-heater so that you spend less money getting the temperature of your water over the required 60C. There shouldn't be any need for 100C water in your hot water cylinder.
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killerflies



Joined: 11 Jul 2008
Posts: 40


Location: Galway

PostPosted: Mon Aug 11, 2008 1:32 pm    Post subject: Reply with quote

Any update on how that has worked for you?

Would be keen to know.



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