Kenneth wrote:

> Despite my descriptions, many folks assumed that the steam was under
> pressure because I used a pressure cooker as the vessel. There was no
> pressure because the end of the tube was open...

If steam production in the cooker is higher than what can escape through
the tube, pressure would build up (all theory since I don't know your
detailed setup) and steam temperature would rise above atmospheric
boiling point inside the cooker.

If there is no or neglectable radiation head loss on the pipe, steam
with higher than the atmospheric boiling point could reach the oven. If
you get enough "oomph" behind that setup one could heat the oven with
steam instead of gas or coils and probably make a sauna out of your
kitchen.

I found this about superheated steam:

Superheated steam, steam heated to a temperature higher than the boiling
point corresponding to its pressure. It can not exist in contact with
water, nor contain water, and resembles a perfect gas; -- called also
surcharged steam, anhydrous steam, and steam gas.

Now to "i":

> It is very easy to get superheated steam. There is no need for higher
> pressure at all. Just make steam and then heat it in some sort of heat
> exchanger or whatever.

Practical setup would be a pressure less cooker for the steam and then
another heater coil or similar to heat up the steam to get it
"superheated".

I don't see a need for two heat sources and some additional coil setup
to create steam and name it "superheated".

With a pressure cooker under pressure from heating water inside above
atmospheric boiling point and leaking steam into the open will produce
superheated steam.

> Your natural gas water heater produces a lot of "superheated steam"
> when hydrogen in the natural gas burns and produces H2O.

The water heater is in the basement, kitchen oven one level higher - not
considered feasible and, see below.

> Any natural gas fired stove has lots of "superheated steam" as well.

And? With both methods, you may create a hazardous situation trying to
use it. How would you separate the CO2 from the water steam? What you
essentially need to do is lead part of the heater exhaust back into the
house. That's probably ok but need more testing to be added in the next
edition of 101 ways to kill yourself. Try it and report back so it can
be dropped because it won't work. Just remember to keep accurate notes
as you progress in the experiment.

> Or burn hydrogen in some form. It will expand
> as it heats. So you need to make sure that there is plenty of room to
> expand and vent away.

I know it is very exciting to play with hydrogen cylinders in your
kitchen with the oven on full. See how long it takes to depressure a
cylinder with various valve opening, like one turn, two turns... Another
good candidate for the next issue of 101 ways to kill yourself. Try it
and remember to keep good notes in a fireproof box and report back.

< All the best,

Yesss!!!

Samartha

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