Increasing the gas flow through a burner 3

[daviddor]

Hii everyone , i would like to increase the gas flow into a burner in a pizza stove and increase the power which in now about 15,000 btu, would like to increase to a maximum of 30,000 btu. My idea is to adjust the orifice and then increase the air flow ,but don't really have a clue. would like to backup my ideas with some calculations. i am adding the photos of the stove and the pipe system , thank you very much

 

[FacEngrPE]

MortenA - Your comment about swamping a non technical person with 55 pages of technical material is valid. I was hoping it would be enough to give the idea that modifying a oven to correct some "problem" is not a simple task.

So here is how i would approach this problem.
Assume the initial setup was not completed correctly.
So the first task is to review the reportedly sparse information that came with the oven.
There should be some instructions for initial adjustment of the burner. They should be something like this.
Pizza ovens are all similar enough that using a search similar to

https://duckduckgo.com/?t=lm&q=gas+piza+oven+installation+instructions&ia=web

will find enough instruction manuals that one should look similar to your oven.

Use these instructions to adjust the high flame setting to not exceed the burner rating on the oven label plate. This may require adjusting the pressure regulator setting (the one that is part of the oven).
Then adjust the air fuel ratio by adjusting the quadrant at the fan outlet.

If this threads guidance is confusing, you should consider hiring a gas fitter or oven installer familiar with initial setup of commercial kitchen equipment.

 

[LittleInch]

daviddor,

So are you trying to use a "domestic" pizza oven which is designed to have the door closed as a "commercial" oven with pizzas going in and out at a high rate with door open 50% of the time?

"Buying a new oven will exceed the budget". errrr, then you need to increase the budget or buy a used one. You can't get double the heat by magic.
Have you tried e-bay?

I get 15,000 BTU to be just over 4kW. That doesn't sound a lot to me.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[daviddor]

Yeah, we trying to create a cheap solution, I'm wondering what doubles the power in a different system? Is it bigger pipeline that can deal with higher flow rate of gas?

 

[LittleInch]

More burners.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[LittleInch]

What's the issue though?

Not hot enough or can't do more than one pizza every 10 minutes?

Are the temperature controls working properly?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[daviddor]

The time issue yeah, when open the oven, taking two long to heat it up again. Control works well

 

[EdStainless]

Sounds like they undersized the burner system to start with.
Mine recovers in seconds.

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P.E. Metallurgy, consulting work welcomed

 

[TugboatEng]

If the recovery time is the problem you could consider adding some mass to the oven such as a large stone or iron plate. This will store energy and help the oven recover more quickly.

 

[LittleInch]

But then does take longer to get to operating temperature in the first place so there is no easy answer here....

At full flow can you actually measure the gas flow so that you know if the burners are working to the right power?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[EdStainless]

I finally looked, mine will handle a 16" pie (barely) and is rated 29,000BTU.
It does take a while to get to 900F since it has a fairly heavy stone hearth.
But a pizza cooks quickly. Usually 3-4 min and then rotate it and another 2-3 min.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[LittleInch]

Yeh, 15,000 BTU / 4.3 kW just seems too weedy to me

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[FacEngrPE]

Compare to this randomly selected 16 inch pizza oven (this might be Ed's).

https://ooni.com/products/ooni-koda-16,

8.49kWh / 29000 BTU.
I agree with the idea 15,000 BTU is under powered, however adding a hearth stone is a better bet than trying to double your firing rate beyond nameplate rating.