Henric Togereux

Thanks John!

I was planning of keeping the heat exchanger loop open for now. Excess pressure can leave the tank thtough a vertical pipe on the top of the heat exchanger tank. The heated water is normally, however, supposed to circulate out of the rocket stove and into a coil in my main tank (the one actually feeding the radiators).

Thanks Christobal!

I will use the water to heat my house, so... no drinking  ... though, using stainless steel is probably preferred from a corrosion perspective. I do have a stripped stainless steel water heater tank with enamel on the inside, and I might use this... The tank wall thickness is probably still max 1/25" but hopefully it can be kept cool from the rotating water.

Hi again!

In my batch box rocket stove water boiler I'm about to place a water filled steel tank in the upper part of the barrel as a heat exchanger. The riser will blast the tank from below and at the impact point I will weld a 1/2" steel plate for protection. Though... are there other considerations I have to make regarding the steel wall thickness of this tank? I have lots of quite thin barrels I could use, but these have walls barely 1/25".

Thanks for any comments!
Henric

Merry Xmas everyone  

I'm building a 6.5" batch box rocket water boiler and I wonder if the recommended bell size of ~65 square feet still applies when insulating the bell to transfer as much heat as possible into a water tank located inside the bell?

Thanks!
Henric  

Thanks! Then it's settled. Will start building this weekend 🙂

Thanks Thomas!

Unfortunately, my house was built 1900 and the metal flu has been inserted into one of the original pipes in the brick chimney. Thus, it's 6 inch from roof to basement without any chance of making it bigger unless I rip it out completely... So... then I will have to stick to a 6-6.5 inch build. Though, you say that it is possible to make the depth of the burn chamber longer without compromising the efficiency? The recommended fire box depth for a 6 inch is 432 mm (sorry, I don't have the measurement in inches in front of me). Do you know how much I can extend the depth?

Best regards,
Henric

Hi all,

I have a 6 inch wide and 40 foot long insulated and straight up steel tube chimney. The draft is very good (almost too good). Can I build a 7 or 8 inch batch box or do I need to stick to 6 or 6.5 in order not to get problems / sub optimize?

Thanks!
Henric

Thanks Jordan.

I'm still on the drawing board, so I will consider your thoughts 🙂

Regarding the size of an existing chimney and the max size of a rocket stove, does it matter that my existing flu ia over 12 m high, straight up and insulated? It has a very strong draft.

Cheers,
Henrik

Thanks Peter.

Too bad... there goes my 8 inch plans :/ I have a straight smooth pipe, but it's probably somewhere between 5 and 6 inches. Nowhere near 8. Installing a new one is a very expensive endeavor and would probably take a year of Swedish bureaucracy...

Cheers,
Henrik

Haha... it's a compliment you consider it a drawing 🙂 I use PowerPoint and I'm happy if you understand what it is.