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Garage_Hermit

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Reply with quote  #41 
October 5th - End of Collection Phase ("slate-sucking")
==========================

Here are the photos of the completed fan installation.

I say "complete", but the fan is still only temporary, until I get final details worked out.

After Collection, the next phase will be Distribution - getting the air into the various zones I want to heat around the house.

I will finish off with Storage - crawlspace rock store and water battery, to utilize whatever heat is left.

Still got some calculations to do, like why the fan outlet is 26°C, whereas the fan intake is 42 degrees C!

Thanks for watching[smile]
G_H

Attached Images
jpeg 3-After.jpg (166.63 KB, 197 views)
jpeg 1-Before.jpg (157.37 KB, 198 views)
jpeg 2-During.jpg (118.70 KB, 197 views)


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

Garage_Hermit

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Reply with quote  #42 
Update 13 November 2013
=================

For details of my intermittent offgassing problem due to polyurethane foam, see "General" topic here: http://simplysolar.supporttopics.com/post/off-gassing-and-odors-6616197?trail=20#14

G_H

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

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Reply with quote  #43 
Update - 22 November
===============

Gradually getting my ideas sorted for the storage part of my project.

The Crawlspace will act as a heat store, with both a rock storage and a static water battery.

The exhausted roof air will be ejected through the garage, I was planning this as a simple dump, but looking at it again, it will have to be ducted, as the garage will be collecting HEAT via the Door Collector, and I do not want the two airstreams getting mixed...
So the exhaust will go through the door as depicted, or through the side wall.

The second aspect is the Basement Air Circulation Main that I intend to try. The purpose of this is to store solar gain in winter, by warming the Crawlspace air over and above whatever the Roof Pump can provide.

When the basement is hotter than the CS, the calories go into the CS.  If the CS is hotter than the basement (dull days, night...), then the calories should be transported back into the Basement.

That is the theory at least...

G_H

Attached Images
jpeg Basement_Air_Main.JPG (64.39 KB, 156 views)


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

netttech

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Reply with quote  #44 
Wow, the devil is in the details. [smile]

I wouldn't know how to act with 'plans'. lol

Looks like a whopper of a project though.

Jeff
Central IL
Garage_Hermit

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Reply with quote  #45 
Hi, Jeff,

Thanks for the feedback !

Yes, it is a pretty big project, lots of different aspects, but it has to be done !
We are all-electric, and I want to SLASH the bill !

Basically, the architect (1983) wanted to build a bioclimatic house.  I have the plans, but not his design notes...

He did not do too bad of a job, but he left certain things out, for whatever reasons.
(Guess he knew that one day I would come along and finish the job for him !)

Per plans, the sunspaces were originally to have had internal patio doors, forming an entirely enclosed "glass box".  For some reason, these were not installed.  Probably not a bad idea, considering...

Good points:
  • external insulation (R 16)
  • efficient roof insulation (R 18)
  • plenty of south-facing glass
  • massive floors
  • infloor electric heating
  • north side of house part-buried
  • lots of thermal mass
  • slate roof
Design Errors/Omissions:
  • no heating-air routes through crosswall (!)
  • no spare box-outs thru floors for HVAC and/or sanitary plumbing (!)
  • legacy open fireplace (!)
  • unfinished crawlspace (!)
  • no sun protection to sun windows (!)
Worst of all, thirty years on, it is kind-of difficult to upgrade the roof insulation: I would like to add reflective insulation to beef up the R factor. For this, the wood-strip ceiling would need either labor-intensive removal, or would be "buried" under the add-on insulation, and then new paneling would be needed...  Therefore I just beefed up the north slope.  In time, I will eventually get round to re-insulating, for sure...

========
So my project is basically a "mid-life upgrade" of the heating system - identifying Simply Solar solutions for producing heat, and thus avoid turning on the infloor electric.

I initially considered solar collectors, but these are generally problematic for municipal planning reasons (we live in a restricted zone, due to nearby historic monument).

So I went for stealth collection solutions, and eventually hit on the roof harvesting idea...

Now it apparently works, I have to finalize the STORAGE aspect, as we often go 5 days without any sun (!)

My infloor electric consumes 30 kWh per night, off-peak.  I have not yet turned it on this year !
We put in a wood stove several weeks ago, I am now roadworthy with it!
It puts 1.5 °K on the house in approx. 2 hours which is very nice !

In addition to that, I still need to be able to store 5 days of solar heating = 150 kW.
That is why I am currently working on the Crawlspace...
I'm convinced I can get there, it is just taking a bit of time !

In the meantime, I got my electric power analysis back - I saved 187 Euro on the bill so far this year, that is about 200 USD I guess... 

Today my wife gave me the go-ahead to go for a new Garage Door, so watch this space !
I will soon convert that into a real humdinger of a Solar Air Collector... so watch this space again !

G_H

P.S. @SCOTT

Just wondering if we could have a "Regrets / Wish-List" category in "Member Proects"...
I would like to put some stuff in there, namely, my above "architect complaints" !
At the top of my Wish List, I would have, "Bioclimatic Sunspace"
followed by
10-channel centralized temperature recorder
sun-actuated motorized roller screens...

nice to dream...


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

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Reply with quote  #46 
UPDATE, 10th December
================= ==

Sunday night we got our 1st frost of the winter - it was -0.5°C = 31°F.

(I am not complaining, everything is relative, compared to Minnesota...)[rolleyes]
============================
First thing I noticed, was a patch of BLACK around my skylight - this is where I draw my roof air from.
So I am obviously leaking heat out through this area...
I had not thought of this, but obviously, breaking open the insulation has its downsides...
All I had planned for, was preventing air leakage, back through my fan housing...

So I now have to devise an add-on insulation blanket to go on the ceiling at this area...
It should not be too much of a problem, I will get there...
========
The upside is, I was pretty "happy" with my north slope, which I re-insulated over the last year...
It is still not perfect - I can see my two trusses & purlins, also some rafters, and the new skylight from last March is obviously improperly sealed  (left-hand patch...).  (I suspected this, now I have the proof...).

The office skylight (right-hand patch) is also leaking some, no doubt from where I "explored" the insulation earlier this year, so more work required there, also.  The middle patch is the forced-ventilation exhaust stack, so a bit more attention to detail also required there, will do these jobs this week...
=========================
It is interesting to see the heat-loss generated by roof timbers - I am not sure what the solution is... ? perhaps, wrap insulation blanket completely over the timbers ?

ANOTHER thought that occurred to me, FWIW, is, Roof-Harvesting is obviously of NO USE AT ALL !  in a snowy climate...
=========================
Currently we are under a ridge of high pressure, so it is very fair indeed, and sunny - running the house at 23°C (73°F) without any heating on at all in the day; we put the wood stove on in the afternoon, & the house temp degrades to 19°C (66°F) or 20°C (68°F) overnight.  (We don't run the WS overnight).

We are currently getting 12-15°C days, and I can generally pump the roof at 27°C constant, for around 5 hours.  However, I don't really need the heat, as the house is doing OK just from the solar gain.

The actual purpose of the Roof Pump is to grab EXTRA heat, for storing in the Crawlspace, to get us over 4 or 5 days of dull weather, so I don't have to use the electric floors. And due to lateness & other things, I still have not got the CS fitted out...

What is obvious, is that installing a wood stove has made the house *much* warmer (by 2°C), because the open fireplace has gone, and it was previously SUCKING ALL THE HEAT out of the house !

Crawlspace Effort will be resuming SHORTLY, so watch this space !

Hope everybody is staying WARM & cheerful [smile]

G_H

Attached Images
jpeg FIRST-FROST__SOUTH__10_December.jpg (264.47 KB, 131 views)


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

netttech

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Reply with quote  #47 
The only 'good' thing about about cold/frost is it definately shows where a house is isulated or not.

You can drive down a street & pick out the unsulated houses. [smile]

Jeff
Central IL
Garage_Hermit

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Reply with quote  #48 
Yes, Jeff,

You are right !

In fact, when I saw that missing frost, I felt *ashamed* at what I had *almost* done to my roof !

I started thinking of ways to put the damage right, yet still utilize all that FREE HEAT...

Here is the answer, I think !

Namely, overglaze the facade, and connect the slate facade into the PVC plenum using ports, and pull all the hot air in thru the basement window.  Then gunk up the missing insulation around my skylight and pretend I never touched it [rolleyes]



Watch this space !

G_H

Attached Images
jpeg Second-Generation_Slate-Sucking_System.jpg (151.66 KB, 115 views)


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

Garage_Hermit

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Reply with quote  #49 
Hi, All,

Here at last is my newly thought-out hybrid collector set-up for my vertical slate facade.

(I never liked the idea of fiddling with the roof, anyhow [redface] )

It is based on a 5-inch PVC pipe, fitted to the lower timber frame of the facade.

Slots are cut in the facade frame, to take a series of aluminum channels that communicate with the PVC duct (via a series of sealed slots).

The channels on the right-side of the facade pick up OUTSIDE AIR *warmed* in the facade, and feed it into the garage (via a cut-out in the garage door). This air is then ducted into the Crawlspace, to warm a 1000 USG static water battery.

The left-hand channels contain small-bore PEX piping (around one liter of antifreeze capacity).
The PEX is routed back along the PVC duct, then in thru the Basement Laundry, thence to a heat exchanger mounted on my DHW tank.

[image]
However, all of this is going to have to wait till after the holidays !

G_H

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

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Reply with quote  #50 
Update - 14th January
=================

Finally got some sunshine in between the rains, so got to work outside at last...

First mocked up a couple of panels for the facade - the intention is to drag warm air from under the slates, into the basement Laundy, through the window, to warm the basement (read, Crawlspace...) and utilize the solar gain.

Nothing is finished or even sealed up yet, but it seems to work: stagnated at 25°C, for 15°C outside air temp (that is, 77°F, for 59°F)

When I opened the window, the temp fell to 20°C (68°F), but this still looks encouraging as it seemed to hold OK for a good while, despite all the leaks.  (I am just on thermosiphon for the moment).

===========

Then I turned my attention to the house main fresh air intake, which is a grill at garden level, that tends to get invaded by snails, the occasional ivy root etc.

I dug out a trench, and installed some 4-inch dia. PVC.  Insulated everything up with 80 mm of styrofoam and PU gunk.  Then fitted a (removable) riser, to keep the rain out.  Will no doubt have to suck out condensate from time to time...

The short stub on the R/H side is on standby for a second riser, that will go in to a plenum on the Kitchen Window just as soon as I get some glass...

That window gets very hot (27°C, for 15°C outside air) (80°F, for 59°F)  and I reckon that the volume of air will allow quite a bit of "borrowing" - this has to be tested yet...

If the system works, I will rip it out eventually, and replace everything with metal pipes.

I am thinking of pumping this kitchen window air at 600 CFM for starters - the colder the sun window gets, the more solar gain it ought to attract (well, that's my theory, and I'm sticking to it !)

So watch this space for more strange ideas !

Modif - 4 Feb.   NOTE: If I was doing this again, I would use six-inch pipe, and not 4-inch...   Still, can retrofit this change later -- it obviously means knocking out the wall intake to 6-inch dia also...

G_HCopie de puits canadien inversé 005.jpg glazed facade mockup__1_ 007.jpg


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