Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1995-05-30
1998-05-12
Nguyen, Hoang
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
416241R, 4152161, 148325, 420109, F01K 722, B63H 126
Patent
active
057492280
ABSTRACT:
A steam turbine in which principal components to be exposed to high temperatures are all made of ferritic steel, whereby the temperatures of main steam and reheat steam can be increased to 610-660 (.degree.C.). The rotor shaft (23 in FIG. 1) of the steam turbine is made of ferritic forged steel whose 100,000-hour creep rupture strength is at least 15 (kg/mm.sup.2) at the service temperature of the rotor shaft. Likewise, the casing (18) is made of ferritic cast steel whose 100,000-hour creep rupture strength is at least 10 (kg/mm.sup.2). The steam turbine of high thermal efficiency can be applied to a steam-turbine power plant.
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Fujita Toshio
Fukui Yutaka
Hidaka Kishio
Hiraga Ryo
Kuriyama Mitsuo
Hitachi , Ltd.
Nguyen Hoang
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