dave jersey

I am getting ready to put a RMH in a green house that is app. 20x50. I have no idea how big I need to make the RMH. I have electric in the greenhouse so I can circulate the air with a fan. I live in Virginia so the winters are not bad. Can anyone please give me advice or a place that I might research this subject.  I am sure this has been brought up before so links to threads would also be most welcome. We have made small RMH before. This is the first large one we are doing and I done know how to gauge the size of the heater or mass. Thank you in advance.

Hey everyone!
After a couple years bumping around Peru where heat is not needed, i have landed in Ireland.  Back to thinking about RMH as heat source.  Wood is scarce here, but peat is plentiful.  Any insights, or better yet, actual RMH/Rocket Stove users here in the Emerald Isle using Peat as fuel?

dave

Up to 5" diameter - http://www.vermiculitecoated.com/high-temperature-heat-resistant-thermal-insulation-sleeve-tape-rope-fabric-firesleeve.html

1500°F / 815°C: Braided Vermiculite Coated Fiberglass Sleeve: Premium
Grade. Very High Temperature & Heat Resistant
FlameShield™ braided fiberglass sleeve with
specialty coating of Vermiculite.
 Available in thin wall (1/16 in. / 1.6mm.) and
thick wall (1/8 in. / 3.18mm.).
 1500°F / 815°C continuous exposure with
excursion to 2000°F / 1093°C.
1500°F / 815°C continuous rating, high insulation value & excellent personnel protection
The Vermiculite coating adds abrasion resistance and higher temperature capabilities which makes this sleeve a good
insulator for hose, cable and copper or aluminum tubing.

https://permies.com/forums/bookmarks/insert/2/20896

too bad it doesn't suggest other topics when i start one.

dave

Working up in coal country this week, got me wondering if anyone has used coal as a fuel, or as a supplementary fuel

dave

The text from Wikipedia: Refractory use

Water glass is a useful binder of solids, such as vermiculite and perlite. When blended with the aforementioned lightweight aggregates, water glass can be used to make hard, high-temperature insulation boards used for refractories, passive fire protection and high temperature insulations, such as moulded pipe insulation applications. When mixed with finely divided mineral powders, such as vermiculite dust (which is common scrap from the exfoliation process), one can produce high temperature adhesives. The intumescence disappears in the presence of finely divided mineral dust, whereby the waterglass becomes a mere matrix. Waterglass is inexpensive and abundantly available, which makes its use popular in many refractory applications.

Hmmm. So this indicates that it might be possible to make a sweeping turn for the exhaust gasses as they exit the burn chamber - not necessarily a good thing but I may try it anyhow in one of my mockup stoves.. I'm planning on putting some thermocouples in various places as i do the test builds to see what is optimum design.


I agree, Alan, that this looks really promising. Thanks for your reply and patience with us noobs.

BTW D Smith i come from your neck of the woods, live in Virginia now but went to Clarkson and SUNY Potsdam!

Good info, Allen but the question remains - what has proven to be the most durable and efficient (and preferably affordable and workable) material for constructing the heat riser? I travel quite a bit for work and really don't want to get the "honey the rocket stove is acting funny" phone call when I'm in outer East Overshoe and can't get home for 4 days then make it home to an IBC of frozen fish and a very angry wife