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G3OCR

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Reply with quote  #41 
Thanks for that, SI.  I have now amended #36 and my post above accordingly.

Stu

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G3OCR

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Reply with quote  #42 
A year has passed (!!) and a Summer.  I've learned a few things . . . .

  1. I'm getting great heat out of the panel, but I seem to be losing some where the pipes from the panel go through the wall - I need to improve the sealing.
  2. I seem to be getting a lot of heat through the morning when the sun is shining, through 2 windows about 18* by 15", one on the East side and one on the South.  These really warm the place up in the morning and the insulated walls and windows seem to keep the heat, so the inside is always several degrees (Celsius) warmer than outside, which means that I'm not getting any condensation even when there's mist/fog in the garden.
  3. When I started, I forgot to allow for the low height of the sun in the 2 mid-Winter months, and the collector sees very little sun then.  It's still getting a few hours of sun now, at the beginning of November, but by the solstice the collector will be screened by the house roof around 70 feet away to the South, and I'll have to revert to a 50 or 100 watt heater to keep the temperature up.
  4. Air is coming out of the slab (into the structure) at the far end from the collector at a temperature close to the air that passes from the structure back into the collector input.  Presumably the heat is being put into the slab, but is it distributed evenly front-to-back, for maximum storage?  I'm thinking of raising the floor a few inches and allowing more air-flow.  I'll probably do this with concrete pavers and initially not make it permanent, so I can experiment with the height of the space underneath.
  5. I initially fitted a single screen of grey fibre-glass mesh, and then put a layer of black landscape fabric about an inch above it (closer to the twin-wall polycarbonate glazing).  This was because I'd seen suggestions of this fabric here and on the forum, and the fabric is much cheaper than mesh in UK (possibly because there's not much call for bug-screen here!).  However, after one Summer, the fabric is disintegrating.  I have some spare from the pack I bought which will probably last through the Winter, but it won't survive another Summer and will need replacing (with mesh) then.
Unfortunately for the project, it looks like I may be moving home in the New year, so I may have to start all over again, but I'll get what information I can out of this, my first attempt, and apply that to any new construction if I do move!

73 for now, de G3OCR [wink]

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"Merseyside" would have been better named "Murky-Side"!
Garage_Hermit

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Reply with quote  #43 
Hiya, Stu !

Great to have your news !

Good to hear the collector is working !
Not to mention the windows (that is what they are for !)
Like U say, it looks like the external (cold) part of the wall is getting to the heat output first, so you're right about the sealing!  Why not try a can of this stuff...
[Mousse-expansive_RUBSON-HENKEL_SOUDAL]
(Declaration of interest : Wished like hell I owned shares in either of the above companies [sneaky] )
=========
For point (4), try laying 2 thermometers direct on the slab, one at the collector side, and one at the far side, and comparing them...
Theoretically, the temperature should travel a certain way "only" into the slab, then expire...

This is because heat is lost according to the square of the distance, so at the far end, you have probably got not heat at all, frankly...

(This is certainly true as regards the wall behind my woodburner -- it gets very hot, but cools off rapidly as you move your hand along the wall and away from the stove).
 
Good news about your house-move - make sure you do a solar survey before signing !
Make sure that the crawlspace is cleaned out before you buy !

Mebbe somebody should start a new thread about Simply Solar House-Buyer Tips !

Cheers,

G_H


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(1)  "Heat goes from hot to cold, there is no directional bias"
(2) It's wrote, "voilĂ " unless talking musical instruments...
solardan1959

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Reply with quote  #44 
Stu,
   I was just wondering about you and your project the other day, Got a simple fix, mount a 6X6 panel on top of a 20 foot hollow pole.  Then split the chamber in the hollow pole so the air can travel to and from the collector in the pole. Or you can use two pillars where one feeds it and one returns the heat. (may be simpler to move)
Nice to hear from you, Dan
Garage_Hermit

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Reply with quote  #45 
Stu,

As per normal, I've got an even better idea than Solar Dan !

(ha ha, sorry, Dan, just had to put a big stick out there, Hope You will Bite It... [biggrin])

Use your south-facing HOUSE ROOF, as a passive collector.

It will generate more than enough low-grade heat, to warm your shack, plus your garage and your cellar !

Wish I'd mentioned this before, but you had already done the slab !


try reading this (in addition, it is from YORKSHIRE...)
http://www.viking-house.co.uk/victorian-solar-house.html

(for any puzzled readers, Yorkshire is Generally Considered to Be A  Much Superior County to Lancashire...)


G_H

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(1)  "Heat goes from hot to cold, there is no directional bias"
(2) It's wrote, "voilĂ " unless talking musical instruments...
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