RE: GAS-L: Wasted heat retrieval to electrical power

[Weststeijn A <A.Weststeijn@epz.nl>]

Hi Peter,

> Peter Singfield[SMTP:snkm@btl.net]
> maandag 19 februari 2001 1:00
> 
> Andries made a comment (probably off list) regarding 1250 F being the
> practical upper limit for super heated steam --
> Andries -- take a look at:
> http://www.nedo.go.jp/3color-e/shinene/shoene-4.html
> 1300 to 1400 "C"
> 
Peter, I commented on superheated steam temperatures in boilers. That's
about steel.
This link is on ceramic materials for GT's. Different ball game.

On the S/H steam temperatures in boilers:
You consistently continu to refer to 1400 F (= 660 C) as "normal" for
boilers.
I keep pointing out that this is an very advanced temperature condition. And
certainly is not generally introduced state of the art.

There is an European R&D project going on -including large boiler and
turbine manufacturers- with the aim of 700 Centigrade S/H life steam
temperature for large boilers to be reached in about 2010-2015! May that
tell you something.

Don't keep mentioning 1400 F S/H steam as a piece of cake for boilers and
turbines. It isn't.
It's all about transition to austenitic steels, having to qualify from step
1 in this service, and making for very expensive materials.
It is NOT the cheap and easy solution -simply copied from another
application into boiler use- you are looking for.