[Vo]:Heat engine & steam question

[Hoyt A. Stearns Jr.]

  HI,

  If you have very hot dry steam but at atmospheric pressure, what are the
options to convert that thermal energy into rotary energy?
  Stirling engine? Steam compressor?

  I know that most power plants use about 900°C and about 1000 PSI to run
the turbines, but what if you just don't have the pressure?

  Thanks,

  Hoyt Stearns
  Scottsdale, Arizona US