Hi Timo, you have got it right. Insulation can make a huge difference to steam delivery, as you minimise wastage (lost) heat. Also, the water quantity is almost immaterial, as in principle, for constant running of any engine, you want to keep the water within limits.No not really collected any hard fact numbers, it is sufficient to drive a small thing like an Elmers Engines, or the Gerries Beam Engine.
Both engines run on compressed air well below 1 bar.
I would guess it also depends very much on the heat source and the insulation. (which are both not finalized yet)
I think this is not the best boiler for a "workhorse" engine, but good enough for "my toy" enginges they do not have to do work.
The running time is about 10 maybe 20 min and it stays well below 3 bar. (I get the safety valve only to open when I close the steam valve and wait a little)
Starting the heating with around 200 ml of Water. The total Volume as per CAD program is 290 ml.
I think the steam was fairly wet coming out of the boiler, some kind of overheating would be a good idea.
Maybe in the final setup I take the steam line once through the flame.
I hope that helps.
(I may seem "sad" to some, but I enjoy it!) Hope that helps?
The other day I cleaned a coffee cup. One of those, with a lid; Americans use while driving.A number of years ago our back road car cruise club visited an old garage out in the middle of nowhere the guy had the scariest boiler I’ve ever seen it was an old air tank that he filled with water to supply hot water to his pressure washer . He simply filled the air tank with water then set it on the barbecue grill and turned the flame on the fittings looked like the chickens welded them with chicken poop. No safety valve he just turned the heat down when it got hot enough. No pressure gage.
For cleaning coffee mugs, coffee pots or tea pots, Steradent or similar false teeth cleaning tablets takes a lot of beating. Diversey do a product industrially called Dual-Dip which is the same chemical.The other day I cleaned a coffee cup. One of those, with a lid; Americans use while driving.
A little hot water to clean it. Close the cover, shake and... .boom, there goes the lid into the neighbours garden.
Danger never sleeps.