Win a copy of Permaculture Design Companion this week in the Permaculture Design forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • paul wheaton
stewards:
  • Jocelyn Campbell
  • Mike Jay Haasl
  • Burra Maluca
garden masters:
  • James Freyr
  • Joylynn Hardesty
  • Steve Thorn
  • Greg Martin
gardeners:
  • Carla Burke
  • Dave Burton
  • Pearl Sutton

How to work out how powerful a rocket stove is. I can boil 2L water in 6mins.

 
Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
My rocket stove/BBQ I can boil 2L of water at about 15deg celsius up to a violent boil in 6mins. From that information can you woek out how much power it has?

Will that then be in BTU's?
 
Posts: 269
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Ooh, a math problem.

Q = m*cp*deltaT

2L of water has a mass of 2 kg
15 degrees ac to oiling will make a deltaT of 85 degrees
cp for water is 4186 J/kgC

So Q = 2*4186*85 = 712 kJ = 676 BTU

of course this is over 6 minutes, so the power evolved by the RMH would be these numbers divided by 360 seconds. So approximately 2 kW of power.

These numbers are rough ballpark kind of numbers. Your water probably isn't pure water, so the density, specific heat, and boiling points will all be a little different. But still, your stove is putting out a fair bit of energy!
 
These are not the droids you are looking for. Perhaps I can interest you in a tiny ad?
September-October Homestead Skills Jamboree 2019
https://permies.com/wiki/118704/permaculture-projects/September-October-Homestead-Skills-Jamboree
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!