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Renewable Energy Questions/Discussion => Solar (heating or electric) => Topic started by: eraser3000 on October 02, 2016, 08:07:45 pm

Title: Evacuated Tube System
Post by: eraser3000 on October 02, 2016, 08:07:45 pm

I decided to try to get my evac tube system plumbed in today.
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I built a tray, if you will using 12" I-joists and we are wrapping each line with Fiberglass batts individually.
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Anybody have any good products to wrap and insulate 3/4 size stainless tubing/3/4 iron pipe? It needs to be ultra high temperature.
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Thanks

Title: Re: Evacuated Tube System
Post by: bj on October 03, 2016, 06:43:52 am

  Commercial pipe insulation might be the ticket.  Hard preformed fibreglass, split along one side lengthwise.  It's made
in all pipe diameters.  Has to be wrapped in some kiind of water barrier.  Most commercial stuff is covered in light
aluminum,  but even 6 mil poly would work.
  You have some serious heat generation there.
  Nice.

Title: Re: Evacuated Tube System
Post by: eraser3000 on October 03, 2016, 08:38:31 am

Thanks BJ, I will call around today.

Title: Re: Evacuated Tube System
Post by: eraser3000 on October 03, 2016, 12:07:29 pm

Wow, costs are around 12 dollars for three feet in my area.

That is for 3/4" X 2 3/4.

Sound right?

Title: Re: Evacuated Tube System
Post by: bj on October 03, 2016, 06:13:58 pm

  If it is, I wouldn't pay it.  Ben quite a few years since I was involved with it, and if memory serves,
it was in the dollar ten per at that time.
  But, not much has gotten cheaper, so maybe.
  Starting to sound like a bad idea.  Sorry

Title: Re: Evacuated Tube System
Post by: eraser3000 on October 03, 2016, 07:59:50 pm

I found some a little cheaper. Might end up going that way, I still don't think its a bad idea.

Thanks for the input.

Title: Re: Evacuated Tube System
Post by: eraser3000 on October 08, 2016, 09:37:12 pm

Did some more work on these today.

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Title: Re: Evacuated Tube System
Post by: eraser3000 on November 20, 2016, 08:12:41 pm

Did some more work installing another row of evacuated tubes.

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