Gas Cost For Steam Boiler

Regarding gas costs, as you know, the cost of heating during the brewing process varies somewhat as different brewers have different brewing methods.

Take for example the single mash heating and infusion method for a 15bbl (1800l) beer system, the brewer heats the water from 25-35°C, saccharifies it at 35-37°C, submerges the malt in the water, then raises the temperature to 50°C to break down its proteins, then slowly raises the temperature to 65°C, at 72°C it needs to be sectioned for saccharification, and then raises the temperature to 78°C for draining.
So its rough heat cost is about 1800X(78-25)=95400Kcal/h.
If the heating time is 60 minutes.
Then 95400Kcal/h /60=159.0KG/H (rated steam output).

For its boiling stage.
For 1800L boiling kettle, the initial liquid temperature in the tank is 78°C and heated to 100°C.
So 1800X(100-78)=39600Kcal/h.
If the heating time is 60 minutes.
Then 39600Kcal/h/60=66.0KG/H (rated steam output).

Add them together, so the required steam boiler capacity is about 159.0KG/H + 66.0KG/H = 225KG/H (rated steam output)
Since saccharification heat and boiling heat are not often used at the same time, a steam boiler of 200KG/H is sufficient.
1m³ of gas can produce about 8000Kcal to 8500Kcal of energy, so the total amount of gas it needs is about (95400+39600)/8000=17m³/h.