Post by ricrac on Mar 11, 2020 16:16:26 GMT -8
Hi all! I'm new here, i've got a projet of building a batch block linked to an independant bell. I've got only theorical knowledge, never built any, could you give me youre opinion on my project?
The sizing of the batch is made out of Yasin Gach results published on batchrocket.eu site.
The dimensions of the heart of combustion and of the bell are those of Peter van den Berg and Benen Huntley.
My project: to warm a 22m long greenhouse with a cooking batch settled in the house (through 2 ways: convection and blower system)
I've asked Yasin Gach for advices who really helped me yet but i still wonder about the distance that will exist between the batch and the bell: will the draught be enough powerfull to bear this distance?
I've assumed it at 55cm long (10cm behind the batch + 5cm of refractory bricks that will protect the wall + 15cm of wall + 20cm between the house and the bell + 3,5cm the thickness of the bell)
As for the pipe, i found this one that can bear 1100°C www.masterflex.fr/tuyaux-et-systemes-de-connexion/details-du-produit/gaines-resistant-en-temperature-jusqua-1100-c/master-clip-ht-1100.6_7_752_5616.html
Would that be usefull to install it with a slight upper gradient towards the bell?
As you can see in my plans, the chemney is 3m high (as my greenhouse is 2,90m high), there will be a draught control valve and a trapdoor on the bottom of the chemney as to preheat the pipe (with lighted oiled paper).
Also, according to a friend of mine, a thermal shock may occure in the bell at the top of the pipe carrying room temperature air where it will be in contact with hot smokes when entering the bell.
According to him that shock would prevent ambiant air from warming and by the way my blower system would be useless, do you have any opinion about it?
For my part i found some numbers that refutes this theory: taking the volume of my combustion chamber (0,072m3), my bell (2,3m3) would be filled with smokes into less than 2,5 minutes, so there can't be no thermal shock exept at the very beguining of the fire lighting! (my source is from a fire figheter doc: a wood chamber of 29m3 creates 1350m3 of smokes into 2,5minutes)
Here are the plans
The sizing of the batch is made out of Yasin Gach results published on batchrocket.eu site.
The dimensions of the heart of combustion and of the bell are those of Peter van den Berg and Benen Huntley.
My project: to warm a 22m long greenhouse with a cooking batch settled in the house (through 2 ways: convection and blower system)
I've asked Yasin Gach for advices who really helped me yet but i still wonder about the distance that will exist between the batch and the bell: will the draught be enough powerfull to bear this distance?
I've assumed it at 55cm long (10cm behind the batch + 5cm of refractory bricks that will protect the wall + 15cm of wall + 20cm between the house and the bell + 3,5cm the thickness of the bell)
As for the pipe, i found this one that can bear 1100°C www.masterflex.fr/tuyaux-et-systemes-de-connexion/details-du-produit/gaines-resistant-en-temperature-jusqua-1100-c/master-clip-ht-1100.6_7_752_5616.html
Would that be usefull to install it with a slight upper gradient towards the bell?
As you can see in my plans, the chemney is 3m high (as my greenhouse is 2,90m high), there will be a draught control valve and a trapdoor on the bottom of the chemney as to preheat the pipe (with lighted oiled paper).
Also, according to a friend of mine, a thermal shock may occure in the bell at the top of the pipe carrying room temperature air where it will be in contact with hot smokes when entering the bell.
According to him that shock would prevent ambiant air from warming and by the way my blower system would be useless, do you have any opinion about it?
For my part i found some numbers that refutes this theory: taking the volume of my combustion chamber (0,072m3), my bell (2,3m3) would be filled with smokes into less than 2,5 minutes, so there can't be no thermal shock exept at the very beguining of the fire lighting! (my source is from a fire figheter doc: a wood chamber of 29m3 creates 1350m3 of smokes into 2,5minutes)
Here are the plans