EcoRenovator  

Go Back   EcoRenovator > Improvements > Solar Heating
Advanced Search
 


Blog 60+ Home Energy Saving Tips Recent Posts


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 02-24-09, 12:25 PM   #1
Xringer
Lex Parsimoniae
 
Xringer's Avatar
 
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
Default Backyard Heliostat for space heating?



Is it possible to use a backyard Heliostat for space heating?

I think it's possible, but not really easy to understand (at least for me).

I found some Boston Mass solar data at http://rredc.nrel.gov/solar/pubs/redbook/PDFs/MA.PDF

It says that an area of 1 sq meter in my area gets an average of
5.9 KWh per day. About 4 during the winter and 6 to 8 in summer.
(With 2-axis tracking). The general rule of thumb is about 1 KW per hour.


The array that I'm thinking about would be a 10'x10' rack using 25 2'x'2 mirrors.
100 sq feet. Or, 9.3 Sq meters Mounted on my old C-band 10.5' dish mount.

If 5.9 KWh x 9.3 sq meters ( or 100 sq feet)= 54.87 KWh per day, then
that's a whopping 1646 KWh a month!

-----

Winter is when this would be used. So 4 KWh x 9.3 = 37.2 KWh per day.
37.2 over a 6 hour time frame is 6.2 KWh (per hour).

6.2 KWh is about 21,155.28 BTUh..

Did I goof up somewhere here? Is it possible to get about 20,000 BTU of
solar heat (reflected into a rear window) from a 10x10 foot mirror array??

If this is really possible, it would be a pretty dang cheap BTUs per dollar..

Comments please:

Cheers,
Rich

PS:
If it works, I would build a larger one like this

Xringer is offline   Reply With Quote
 



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 05:58 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design