So I have a variety of questions about steam.

First is design. Using a 15 gallon keg boiler with a 5500 watt element. This would push through 2" stainless into a spear in another 15 gallon keg full of mash. Is a steam wand end necessary? Estimated power reaching the keg would be around 3500 watts, accounting for energy loss.

With regards to the process, my calculations yield that for every 1 g of EtOH brought from from 15 to 78 C, the would be 0.989 g of H20 (steam) required as input into the keg. (Assuming delta T of water is 85 C). Thus, in a 23 l mash of 10%, if you extracted 100% EtOH with no cuts, you would have 2.3 l removed with an input of 780ml H2O into the boiler.

Now, if the mash was strictly water, to have a rise of 80 C, it requires 148 g steam per liter. Or 3.4 l water inputted to bring the entire keg to boiling.

Does this make sense? Would you agree my calculations are roughly accurate?

The questions I have, is how to calculate steam pressure on such a system, how much water is required to produce the 780ml steam (only 780ml?) And is the amount of input water into the boiler from the steam condensing accurate?

Cp water 4.186

Cp ethanol 2.44

5500 watts = 5500 joules/second

Condensing steam releases around 2260 joules per gram

Wash is at 15 C

Thanks!