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100% solar heat and HW?? (11 Posts)
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is it even possible
If I had a dollar for every call I get from folks wanting to do this!
Sure with enough $$ and space.
I've followed a company www.jenni.ch for a few years now. Mainly a solar tank manufacturer.
I've watched as they built an 8 unit apt building with 100% solar fraction, in Switzerland. Completed in fall 2007.
Here are the specs if you want to bid one.
13,800 square feet building with 8 units inside.
3000 square feet of collector
205,000L of storage, if my math is correct that's 54,155 gallons!
5-6000L of fuel oil are saved by the solar
Jenni claims the tank was still at 80C in May
Somehow you can view the tank temperatures online
The building blocked the view of a neighbor, so they piped free heat to his home, according to a recent article in SWE mag.
That website has some wild video of how they build and deliver those massive tanks. On this job job they dragged the 205,000L tank through town with people power. Then stood it up and lowered it into the hole by hand. An animated clip, at the website shows how the used fulcrums to do that.
No mention on the installed cost. All those Swiss bank accounts :)
hr
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HR, not too wet here...
.. we get 16 to 19 inches of rain yearly, but the well pump is down 400 feet and has good water. The local wildlife is appreciating the birdbaths these days :~)
Yours, Larry
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You too?
"Whaddya mean, three panels won't heat my house?"
I'm curious about what they use (or mandated) in this buidling for an indoor design temp.
I have some customers that are very comfortable with an indoor temp of 60d F in the dead of winter. I have some elderly that keep the house at 76-78d F.
I wonder what indoor temp the system will deliver on a design day, and if the residents have any say in this matter.
100% solar!!! 100% off grid!!! 100% GREEN!!!
Oh, by the way, if you want the t'stat at 70d F...ain't gonna happen.
Possible?
To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
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N/A
June 25, 2009
@ 9:40 PM
sure it's possible. R2000 homes in canada need to open windows in winter they are so good at holding the heat in. It just takes money, knowledge and effort!
now, get all 3 together in one place at one time.
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Big if..
IF you can use really low grade heat,(like 80*) to keep your building warm and if you have sufficient storage for those cloudy days, you can get nearly 100% solar space heating. DHW is actually harder as it must be a higher temperature.
Yours, Larry
ps. I'd better watch that human engineering!
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Right, Larry
low heat loads, satisfied by low distribution temperature. Generating 140F DHW for 8 units on a year 'round basis is the load.
Hope you are well in No. Cal. Plenty of water for the hot summer?
hr
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big storage/low grade heat
We just commissioned an apartment bldg in Alamosa, Colorado that requires 105 deg. radiant temps at -20F.
We have 42-46% solar fraction via TSOL Pro using 40 Buderus
SKN 3.0 flat plates and 6000 gallon tank. We are banking the Btu's so at start of season Triangle Tube Solo 250 will stay off for first month or 2. Owner was committed by building this 14,000 sq. ft building tight, better windows,
high R-value. He also got a Dept of Agriculture grant for 25% of solar thermal install plus 30% fed. tax credit. He opted out at this point on installing remote monitoring of the solar but we may re-visit that subject. Couple of iSolar Plus controllers handling most of the control logic. Also, 54 zones of non-electric zone valves modulating for us with flow via Wilo Stratos. Project started in Oct. 2008 and just fired solar 2 weeks ago.
Regards,
Eric
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June 26, 2009
@ 2:37 PM
I dunno if that will work as advertised or not.... but it's getting me kind of hot... pun intended, but seriously... it does.
please report on what that system does this winter!!!
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Sounds like Low E design...Shall work..
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