Among the
world's longest steam turbine titanium blades - 45 inches - put into commercial
operation |
|
On July 1, the Kasumi power station of COSMO OIL Co., Ltd./Yokkaichi Refinery
in Japan was put into commercial operation. The Kasumi power station is an IPP
(Independent Power Producer) owned by COSMO OIL Co., Ltd., and PPA was contracted
with Chubu Electric Power (utility company) in 1997. The plant is mainly fueled
with Vacuum Residue and operated as a base load unit. The steam turbine is of reheat,
two casing, single axial exhaust flow type, designed on the basis of state-of-the-art
technology. For the last stage, 45-inch titanium blades are employed, among the
longest 3,600 rpm blades in the world. Each 45-inch titanium blade has an ISB
(integral shroud blade) structure, which design is utilized in many Mitsubishi
steam turbines. This enables even a 223 MW steam turbine to be constructed with
a single exhaust and contributes to a compact design. The 45-inch titanium blade
is designed using full three-dimensional analysis. This brings about high performance,
resulting in the Kasumi steam turbine operating at an excellent performance level.
High reliability and high performance of the 45-inch titanium blades are verified
by the test turbine in the full scale on-load test facility.
The Kasumi power station will deliver stable power of 200 MW to Chubu Electric
Power for 15 years.
Main specifications
| Rated output |
: |
223 MW |
| Main steam pressure |
: |
16.6 MPa g |
| Main steam temperature |
: |
538 deg C |
| Reheat steam temperature |
: |
538 deg C |
| Exhaust pressure |
: |
-96.3 kPa g |
|
