• 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

Rocket stove/dehydrator question from a lazy newbie...  RSS feed

 
Posts: 6
Location: The Netherlands
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi everybody,my name is Martijn and i'm both a first time poster as wel as total newbie to these forums.
Anyway,to get to the point :
Does anybody here have any experience with combining a rocket mass heater with a diy food dehydrator?
I have no land to grow my own food atm,the weather/climate in the Netherlands is not really conductive to Solar dehydration,but our markets sell produce for a really low price at the end of our market days (wednesdays and saturdays) giving me/us the option to buy fresh produce in bulk (sort of).
Now me and some friends of mine do not really need a rocket mass heater to heat our homes right now,but we would like to be able to dry/dehydrate our food and have long term food storage.
So,using woodscraps and tree clippings instead of electricity or natural gas to make a dehydrator just seems like a smart idea to me,but sofar i've found sweet fa on the concept.

So anybody have any tips or ideas?

my thanks in advance,

Martijn...
 
Posts: 6548
Location: Arkansas Ozarks zone 7 alluvial,black,deep loam/clay with few rocks, wonderful creek bottom!
597
bike chicken fungi trees urban woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hello, Martijn and welcome to Permies!
I don't know the answer but I know someone on this site can help you with your question.
We will look forward to your participation here.
 
steward
Posts: 3420
Location: woodland, washington
88
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
haven't tried it, but I don't think it would be terribly difficult. how you design it should depend on the volume of food you intend to dehydrate at once, and the particulars of the food in question. dehydrating a couple of pounds of sweet potatoes is going to be substantially different than dehydrating a pallet of pears.
 
Posts: 68
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I think I may have a solution here! Dehydrating food is done at a relatively low temperature, correct? (under 200 degrees?). As the RMS heats up, the section closest to the barrel is going to be the hottest, while the tail end is the coolest. Put a thermometer on a container that would fit your food however you arrange it and move the container towards or away from the barrel until you find a spot that maintains the general temperature you would like to use! Keep in mind that the longer you run fire, the hotter the whole bench will get so you'll have to keep adjusting.

That's just a "shoot from the hip" idea, I'm sure there are others and better ones! Best of luck
 
Martijn Stokkers
Posts: 6
Location: The Netherlands
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks Adam that's one worth looking into. but correct me if i'm wrong but isn't there in practice some kind of upper limit to how hot the thermal mass"bench" usually gets?
 
Posts: 320
Location: NC (northern piedmont)
14
 
Martijn Stokkers
Posts: 6
Location: The Netherlands
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
you sir,are a hero...
 
Joe Braxton
Posts: 320
Location: NC (northern piedmont)
14
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Glad to help, post details if you build one.
 
Posts: 10
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Anything that gets a breeze blowing through the screens will work. The air does not need to be very warm. Do you think a solar chimney of some sort would work?
Even a near-flattened black-painted trash barrel with vents could function to create a breeze, though would only work in sunshine.
 
pollinator
Posts: 4154
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
59
books fungi hugelkultur solar wofati woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Martijn Stokkers : Do a Permies/Google search for - ' Dragon Heaters ' - They have a (proposed) Design gallery, showing a dehydrator/ clothes dryer cabinet
w/out any fans ! I think these sketches are there to gage future interest. But it gives you clear pictures of this drying compartment over top of a set of over -
sized ( My 'personal' opinion, Y.M.M.V. ! )"bells'' !

For the Future good of the Craft ! Be safe, keep warm ! As always/ your comments and questions are solicited and are Welcome ! PYRO-LOGICALLY Big AL !
 
pollinator
Posts: 3738
Location: Vermont, off grid for 24 years!
87
bee books chicken dog duck fungi solar trees
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Bump.

Has anyone built one? I quickly discovered I need something like this for drying acorns, apples, and others if I'm to succeed in my goal of supplying my own livestock feed. The weather in Vermont at harvest time is either gorgeous or ... not. I don't think solar is a great option in this climate.
 
gardener
Posts: 318
Location: Buffalo, NY
29
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Build your rocket mass heater in the house, then above the barrel (1 meter or so) have a drying rack suspended from your ceiling. You should be getting cooler temperatures (80 to 100 Celsius) with natural convection off of the barrel.
 
Cj Sloane
pollinator
Posts: 3738
Location: Vermont, off grid for 24 years!
87
bee books chicken dog duck fungi solar trees
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I need a stand alone outdoor unit.

Small stuff I can already dry in my oven - 3 racks in a commercial sized oven.
 
Posts: 129
Location: Elgin, IL
3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
What if instead of putting the dehydrator after the stove, we put the stove after the dehydrator? Maybe the rockety-ness of the stove the air could provide enough airflow for some good dehydration? Just an idea...
 
The harder you work, the luckier you get. This tiny ad brings luck - just not good luck or bad luck.
Solar Dehydrator Plans - Combo Package download
https://permies.com/t/solar-dehydrator
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!