LumberJocks

Solar syphon- 'free' shop heat

  • Advertise with us
Project by NedB posted 10-26-2012 11:33 PM 2479 views 12 times favorited 28 comments Add to Favorites Watch

simple shop built solar syphon heater mounted in/through the window of my workshop. Loosely based on plans from the Maine Solar Energy Assoctiation: http://www.builditsolar.com/Projects/SpaceHeating/mssungrabber.htm

Being in a northern climate, I built the ‘vertical’ variant, and used simple plastic sheeting for the see through section, and landscape cloth for the black section.

I finished just as the sun went down today, will report back with how effective it is.

-- Ned - 2B1ASK1 http://nedswoodshop.blogspot.com





28 comments so far

View a1Jim's profile

a1Jim

112296 posts in 2263 days


#1 posted 10-26-2012 11:41 PM

Interesting idea..

-- http://artisticwoodstudio.com Custom furniture

View Joe Lyddon's profile

Joe Lyddon

7798 posts in 2738 days


#2 posted 10-26-2012 11:57 PM

I hope it works…

I would sure like to study this a little more…

Never heard of a Heat Siphon before…

Thanks for working on it!

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View Woodstock's profile

Woodstock

238 posts in 1974 days


#3 posted 10-27-2012 12:12 AM

I saw a lot of these outside the south facing side of mobile homes that had a passive diagonal version of this while living in Blacksburg, VA @ Virginia Tech in the early 80’s. Most folks I talked to seem to like them to supplement their kerosine stoves that most of us had. Wasn’t a lot of added warmth but on a starving student’s budget every little bit helped.

A noted difference on the siphon was diagonal and fully inclosed and fully insulated on the outside. The top of the unit’s hot and cold openings through the outside wall typically were just above the inner floor level and with the bulk of the siphon mass below floor level. Colder dense air that had settled at the bottom of the room entered into the lower back chamber of the siphon and did a U shaped turn at the bottom into the front section that had double pain glass and 3 walls insulated and painted flat black. The sun warmed and expanded this air which rose on its own and back up the top section of the siphon and back into the room, which in turn sucked more colder air in behind it from the same room inside.

Clear as mud?

-Dave

-- I'm not old. Just "well seasoned".

View NedB's profile

NedB

658 posts in 2251 days


#4 posted 10-27-2012 12:22 AM

I’m also going to be putting a 4×8’ panel on the south end of the shop, and will be putting a ‘drop’ ceiling in using rigid insulation.
Cost was under $20, for that price I’ll take ‘any little bit’ of heat I can get.

-- Ned - 2B1ASK1 http://nedswoodshop.blogspot.com

View JJohnston's profile

JJohnston

1586 posts in 1977 days


#5 posted 10-27-2012 12:28 AM

Here in the desert southwest, houses are occasionally built with the entire south wall like this (with more permanent materials). They call it a trombe wall. They’ve kind of fallen out of favor with all except the “boutique” builders (I don’t know why, they work so well), so they’re mainly found on either pueblo-style McMansions, or older, genuine adobes.

-- "Sometimes even now, when I'm feeling lonely and beat, I drift back in time, and I find my feet...Down on Main Street." - Bob Seger

View lew's profile

lew

10088 posts in 2441 days


#6 posted 10-27-2012 12:36 AM

Great post for a neat and functional idea!
Made one of these years ago . Only difference was that I used florescent lamp tubes , with the ends cut off. Painted them black. Placed it at about a 45 degree angle. Heated our bed room with it!

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Beginningwoodworker's profile

Beginningwoodworker

13342 posts in 2359 days


#7 posted 10-27-2012 05:06 AM

Neat idea!

-- CJIII Future cabinetmaker

View NedB's profile

NedB

658 posts in 2251 days


#8 posted 10-27-2012 08:37 AM

I was an avid solar fan back in high school, this differs from a Trombe wall, in that the Trombe is designed to heat up a wall which then radiates heat into the structure, the syphon is a ‘direct’ heat source vs indirect. I’ve been doing a bit more reading, and may expand my planned solar panel on the south side to include most of that wall (minus the door initially, though there’s no reason not to include a collector on the back of that as well)

-- Ned - 2B1ASK1 http://nedswoodshop.blogspot.com

View HalDougherty's profile

HalDougherty

1820 posts in 1923 days


#9 posted 10-27-2012 10:26 AM

Great project. A solar kiln over my heat pump might help lower my heating costs this winter…

-- Hal, Tennessee http://www.first285.com

View NedB's profile

NedB

658 posts in 2251 days


#10 posted 10-27-2012 06:03 PM

Today is mostly overcast, but even with that, the syphon was bringing in heat to the shop. Give me some decent sun on it and it will bring the shop temps up considerably!

-- Ned - 2B1ASK1 http://nedswoodshop.blogspot.com

View Grandpa's profile

Grandpa

3182 posts in 1361 days


#11 posted 10-27-2012 06:22 PM

You might build a heat exchanger in front of your air filter system and get double duty from this too. Just a thought.

View Joe Lyddon's profile

Joe Lyddon

7798 posts in 2738 days


#12 posted 10-27-2012 06:25 PM

Ned…

Now, can you come up with a COOLING syphon?! ... for the warmer / hotter months??

LOL

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View Woodwrecker's profile

Woodwrecker

3632 posts in 2262 days


#13 posted 10-27-2012 07:40 PM

Pretty cool, or should I say “hot” idea Ned !
Let us know if it does the trick.

-- All glory comes from daring to begin.

View NedB's profile

NedB

658 posts in 2251 days


#14 posted 10-27-2012 08:05 PM

View TopamaxSurvivor's profile

TopamaxSurvivor

14855 posts in 2362 days


#15 posted 10-27-2012 08:08 PM

Great work. I have thought about this a lot, but we have too many overcast days.

Joe, Solar cooling is by a thermal chimney to draw air up and out. The intake is run underground to get the air temp down in the 40s.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

showing 1 through 15 of 28 comments

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase