• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies living kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • raven ranson
stewards:
  • paul wheaton
  • Jocelyn Campbell
  • Julia Winter
garden masters:
  • Anne Miller
  • Pearl Sutton
  • thomas rubino
  • Bill Crim
  • Kim Goodwin
  • Joylynn Hardesty
gardeners:
  • Amit Enventres
  • Mike Jay
  • Dan Boone

Feasibility of mini solar dehydrators  RSS feed

 
gardener
Posts: 708
Location: Manitoba, Canada
163
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
There are some great posts in these forums about solar dehydrators. They are excellent. They are also pretty big.

I want to build a solar dehydrator but I'm on a tight budget right now, don't have much food to dry (so don't need a big one now), and don't have a ton of space to store it. Do the principles of these designs scale down? Would a smaller size significantly affect temperature and air flow? I'm thinking of building one with the drying space of a standard 5-tray electric dehydrator.

Thanks in advance for your thoughts!
 
Posts: 239
26
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
We built one of these. It cost around $300US (this included paint and we salvaged roofing from a local companies scrap pile) and took me (unskilled carpenter) and a very skilled carpenter friend of mine two casual days to build. In our climate (coastal cool and damp) it works great for drying herbs and flowers, and when we have taken it inland where it is hotter and drier it will definitely dry fruit and berries. The hardest part was finding food safe screen material that wasn't super pricey, we ended up finding some agricultural mesh (I think it was shade cloth or bird net for orchards) that was made of polyethelene, which is regarded as food safe. We modified it slightly to make the back legs removable for easier loading into the back of a pickup. Not sure if you mean smaller than that but that's what I have for ya.
best ever solar dehydrator
 
gardener
Posts: 2132
Location: Northern WI (zone 4)
368
books food preservation hunting solar trees woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I'd suggest looking at the Walk Radiant solar drier.  I think the height of the unit (front to back) is critical but you could narrow it up as much as you want.  It could very likely stand up in your coat closet tucked away to the side.  Here's a LINK.  And here's my build.
 
Posts: 67
Location: mid Ohio, 40.318626 -83.766931
2
dog homestead solar
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I built my wife a dehydrator several years ago after the huge disappointment with buying the commercial dehydrators.
I used a double glazed window and made a cheap frame/box for it to sit on, the box has several holes in it along the lower edge and
along the top edge. These holes are covered with pieces of mosquito netting to allow air flow but keep out the bugs.
Only upgrade I've thought of for the next one is a solar powered fan for better air flow.
The hight temps created kills everything. I have seen temps in the range if 150 deg.
The window was bought at a habitat for humanity store for $25 and the frame/box was a few $ in scrap wood.
 
pollinator
Posts: 1594
112
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Small is fine. To save $ i would  start with a used window (or window pane) and build to its size. When i built mine it cost $42 (new) for 2 29" x 29" pcs of single strength glass. It shocked me a little.

 
pollinator
Posts: 122
Location: Missoula, MT
13
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Small works fine. Once upon a time I made a solar dehydrator that measured approx. 2'x2'x2'. I used a small glass window, some wood to frame the window, and a metal cabinet. I made it for a client in a couple hours and she was very happy with it.
 
Posts: 26
3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I made a small scale solar dehydrator out of cardboard. It may not be as efficient as one made from wood and properly sealed, but it works.... I haven't tried anything more ambitious than herbs and flowers, so I don't know if it is powerful enough to dry berries and other fruit. Also, I suspect that fruit would likely stick to the cheesecloth, so I'd have to think up some new trays to use before drying fruit.

Just as a note, I found that the chimney draws better when it is pushed down a bit more than is seen in the pictures.

As you can see from the unpainted pictures, the size is about 2 1/2 feet tall with legs. You can use the tissue boxes for scale to see the size of the rest.
Dehystrator-3.jpg
[Thumbnail for Dehystrator-3.jpg]
unpainted dehydrator
Dehydrator-1.jpg
[Thumbnail for Dehydrator-1.jpg]
A look inside
Dehydrator-2.jpg
[Thumbnail for Dehydrator-2.jpg]
Painted Dehydrator
Evan-picking-roses.jpg
[Thumbnail for Evan-picking-roses.jpg]
small helper picking more rose petals
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!