This argument is fucking stupid guys...
We all routinely use magical over-unity water-wheel+screw pump machines to power stuff, why is some kind of rudimentary steam engine such a problem or stretch of the imagination...
Yes, the simulation is lacking. That is not an excuse to include entire branches of technology to fall outside the level of technology Toady actually wants to include. We have thermodynamics-defying systems as an unfortunate but necessary side-effect of the fact that the simulation is currently flawed/limited, not as a conscious decision.
Hell, while I am on the topic of already rediculous and unrealistic crap... Linkages... We have magical mechanisms that can link a lever or pressure plate to something all the way across the damn map, with nothing in between!?
It's called "abstraction", along with, as I said, limited simulation/implementation. Mechanics are getting an overhaul at some point. Will we see that being more complex? I don't know. Maybe, maybe not. In the meantime, the fact that mechanical components link without anything in the intervening space is a video game abstraction that results in occasionally-weird behavior,
not an indication of the amount of technology represented, or of dwarves actually having magical telepathic-lever technology. There is a difference here.
If you are going to come up with an argument against steam power, realism is probably the worst tack to take...
Then tell it to Toady, because more or less
his argument: That it's just not realistic within the technological framework/time-period he's trying to establish. The unrealistic elements you've mentioned are due to suboptimal implementations and system abstractions resulting in weird/exploitable behavior. There is a big difference between "this feature is unrealistic as a necessity of being suboptimally implemented, or because a more realistic option is infeasible" and "this feature is unrealistic in concept, even if implemented in an ideal fashion". I can't speak for Toady himself, but I welcome you to ask him personally. There are many, many examples of Toady deciding to include/exclude a feature because it isn't realistic given the technological constraints, even going as far as to do research on things like mine carts, never mind entire technological paradigms like steam power or electricity.
Harder to heat? Build a bigger fire.
I meant in terms of how things scale. The volume of it would increase proportional to the cube of the radius, whereas the surface area (i.e. the contact area you're actually heating) increases only proportional to the square. It's just not a very easily-scaled design.
So once again, it comes down to being this simple: Yes, it works. How do we know? The same exact concepts (read: EXACT SAME concepts) work in the real world. You not believing this is just you being a moron.
I'm also not saying that it would theoretically impossible or against the laws of physics to build a huge-ass aeolipile-like machine that provides useful power. However, I think it would be infeasible to the point of being a fairly useless contraption, especially given high-middle-ages technology, especially considering the fact that it needs a very significant power source (which is not an issue with the Segner-wheel since it's gravity-fed) and a way to feed it water in a manner that doesn't screw up the pressure (also not an issue with that design, since, well, you aren't doing that).
Also, can you please lay off with the personal insults? Thanks.