Anyone know how to calculate maximum speed of fuel usage by a steam boiler?

[SWK]

I have a mk2 boiler, 60% efficiency, using coal. If i was running it at maximum power usage, how fast would it be eating coal in coal/sec?

But more importantly, how do you figure that out?

Edit: oh yeah, using bobs and angels mods.

[Chatastroph]

I don't have the right numbers in my head, so i will use arbitrary numbers.
if you go with your mouse over a boiler you will see the energy consumption. Lets say this is 2 MW. in these 2 MW is the efficiency already calculated in, so you can ignore the efficiency for that calculation. 1 Coal has an Energy of 8 MJ. MJ is short for MWs. So you can divide the Energy of your fuel with the energy consumption of your boiler and get the burning duration of that fuel. So if my choosen numbers would be correct a boiler MK2 would need 1 coal every 4 seconds or 0.25 coal/sec. The same formula can be used for furnaces and any other building needing fuel.

[serker31]

A machine will consume as much energy as it's stated in its fuel consumption stat - 5.3 mW, that's 5,3 mJ per second. You can do the math from here.
Liquid consumption is a bit more fun. You have 5.3 fuel consumption with 60% efficiency - it is 3.18 mW power output. Since mk2 boiler heat water to 235 C from 15, and it takes 0.2 kJ to heat the water up one degree: 3180 / ( 0.2 * 220 ) = ~72 steam per second. Fortunately enough, steam engines mk2 consume 36/s of steam up to 235 C, so you are good to go with same ratio as normal boilers/steam engines.
By the way, using simple coal is not cool in Angel's. Crushing coal and melting it into coke is more effective, and you really want to start to wash coke instead and make coal pellets.