|
Post by shilo on Mar 2, 2015 5:35:16 GMT -8
I find this Average airflows of chimney vented combustion systems. the first number is L/s the second number is cfm chimney vented oil furnace 40 - 75 80 - 150
B-vented gas furnace 40 - 60 80 - 120
B-vented gas fireplace 30 - 50 60 - 100
open wood/gas fireplace 80 - 300 160 - 600
wood fireplace with doors 30 - 50 60 - 100
wood heater 5 - 15 10 - 30
masonry heater, burning wood 20 - 30 40 - 60
what about rmh? j, batch box, 6, 7, 8.
|
|
|
Post by peterberg on Mar 2, 2015 7:25:19 GMT -8
Not the foggiest idea, I don't own air flow measuring equipment. But I can quess. The J-tube is hard to tell because it's an open system only restricted by the fuel in the feed and the resistance of the air to go down a hot tube. The batch box is a relative small system, something akin to a small masonry heater I would say. Could be on a par with a large box stove. So, something between 10 and 20 liter per second. Not terribly much, houses tend to leak much more when those aren't build like passive houses.
|
|
stoker
Junior Member
Posts: 61
|
Post by stoker on Mar 9, 2015 15:16:39 GMT -8
We can work it out: - Measure the rate at which the wood is consumed: grams per second.
- EITHER
- Look up the typical amount of intake air needed for a given amount of wood, OR
- Look up the stoichiometric amount of air required to burn a given amount of wood.
- Look up (or measure) typical oxygen concentrations in flue gases, and so work out the proportion of excess air.
- Multiply the two together to get the amount of intake air needed for a given amount of wood.
- Multiply the wood consumption rate by the air-per-wood to get the air intake rate.
|
|