Post by flybyjohn on Mar 1, 2018 12:43:26 GMT -8
I have been burning my batch box that I put into my stove box and have a question regarding gas flow. First, I have excellent draft. At the height of the burn, I measured the exit pipe at about 270 - 280 deg F with a probe thermometer through a screw hole and the surface temperature at the top of the barrel was 700 deg F I would like to keep a little more heat from the exhaust in the building. I noticed that the sides, bottom edges and the front top of the steel box measure a surface temp of about 250 deg F on the top to about 95 deg F down near the bottom edges. I would like to do something to lower the exhaust temp a little more but don't really want to add another object that will take up space in the garage.
My thoughts are to get more heat extracted through more of the surface space of the stove surface area. If I place a baffle inside the steel box around the core just at the level of the top of the exit pipe (see picture) and make the gasses flow forward to the front of the stove and then channel them between the sides of the box and the core back to the exit, do you think that this will lower the exhaust temperature any. It seems intuitive that sides and top of the steel box will become hotter thus extracting more radiant heat thus reducing the exhaust wasted heat.
I have about 4.9 inches between the core and the sides of the steel box. I was thinking of placing the baffle at about 9 inches up from the floor and bring it to within 6 inches of the front of the stove. this will leave about twice the area of the exit pipe to make the turn at the front of the stove and then expand in size again to head back towards the exit. I placed the barrel forward of the center of the riser in hopes that the hot gasses would move forward more and not just heading towards the exit but still it was not enough.
What are anyone's thoughts on this and if there is another option, what would it be? thank you.