|
Post by organdy on May 22, 2015 12:20:06 GMT -8
Hello Folks,
I am building a Batch Box Rocket Mass Heater/Masonry Heater that will connect to an existing 7" chimney. Sizing the firebox accordingly for cross-sectional area. I am going to use a bell system connected to clay flue liners or 7" stove pipe for bench. The bench will run 7' horizontally and then 5' vertically where it connects to an existing masonry chimney of 6' height.
I've seen someone build a bake oven on top of the batch box with firebricks, and wondering if anyone has experience or can comment on heat transfer and temperatures using the firebox capping slab(refractory firebrick tile or castable) as the bake oven floor. Insulating three walls and roof (arched or flat) of bake oven. This will require the P-Channel to be routed through the floor or on-top to the side of the fire box. Does anyone have comments about running Secondary air through the floor? To allow either cook top or bake oven above.
For the cook-top option, does using only steel to cap the batch box effect emissions/efficiency? Would firebrick or refactory cap on batch box first, with steel on top be adequate for cooking?
Any thoughts are greatly welcomed. Thank you!
|
|
|
Post by johndepew on May 22, 2015 12:46:07 GMT -8
Hello Folks, Does anyone have comments about running Secondary air through the floor? To allow either cook top or bake oven above. For the cook-top option, does using only steel to cap the batch box effect emissions/efficiency? Would firebrick or refactory cap on batch box first, with steel on top be adequate for cooking? Check out Matthew walker's secondary air design, here donkey32.proboards.com/thread/1433/pre-port-tube-secondary-arrangementAs for using the top of the firebox for cooking, ceramic glass seems to be your best bet. You'll have an awfully hard time keeping steel from warping, I think. Cast iron can work too. Firebrick cap below steel will take quite a while to heat up to cooking temps. You can vent the exhaust out the front of the riser barrel, back over the top of the firebox underneath a raised cooktop and into your bells. There's a wealth of knowledge here, and hopefully others with more experience than me can add to or correct what I've said here. Good luck!
|
|
|
Post by organdy on May 30, 2015 14:37:49 GMT -8
Thanks for the reply and the links. I will look into re-channel flue gases under cook top, thanks.
Do you or anyone know what the temnperatures of the ceramic glass reach when used on top of a batch box heater? I am concerned about heavy pots slamming down and breaking the glass...does anyone have an experience using ceramic glass in this type of application. I see pisla has a ceramic glass cook tops, is this the same stuff we use for wood stove and masonry heater doors or is it thicker speacial grade.. ROBAX is the brand I have access to , thanks
|
|
|
Post by josephcrawley on May 30, 2015 21:05:30 GMT -8
Save your money and find one at the scrap yard. The are breakable but are made for pots. Look at matt walkers posts under experiments. He used one for his cook top
|
|