Efficient low-cost thermal water/space heating
I am working on a project with an engineer friend,
we are trying to develop an efficient low cost solution to thermal solar energy for northern climates.
I believe that what deters most owners from using the possible free/green solar heating
for their residences is the payback and up front cost of thermal systems and PV systems
( at least here in canada )
I've seen quotes in the 5000$/kw installed PV which just doesn't make any sense
( when we can all purchase 25 years mitsubishi panels for ~ 1$/w )
And water thermals are in the same ballpark with paybacks ranging from 20 to 50 years locally.
If we could come up with an aesthetically pleasing solution
( i have plans to integrate the panels into a aluminum panels finish system i am working on as an example)
And come up with a water based battery system, very simple, as less parts as possible,
that could then be used by a few different methods for space heating during nights
( forced air through furnace type radiator , in slab radiant heating using pex setups, old style solid water radiators for examples .. )
We are working with some absorber coating manufacturers to understand the limitations and the implied costs , i believe that the absorber sheet performance is the key to efficient low cost design on flat plate collectors .
Then, hot water going to electrical water heater tank could be circulated in the water battery before getting to the tanks ...matches the profile easily, setup is almost inexistent ( simple reroute )
it can also be used during summer time if required ( for water heating purposes and later if some units come available ...ab/adsortption cooling )
Peak water battery temperatures comes in late day, right before most use shower hot water during the evening.
From what i could gather, seems fairly easy to get 30% solar efficiency, and with a low cost panel setup, more area could be turned to energy.
What do you think ?
I am certain we can lower panel cost as we've already come up with a few ideas for manufacturing
that cust involved labor by 5fold, and it could be all done here in Canada instead of china
as most other solar thermal panels manufacturer do right now :(
Posted Fri, 03/22/2013 - 11:20
Edited Fri, 03/22/2013 - 12:54
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