POWER July 2011 - 9

put online in 30 minutes and stable load gradients of 35 MW/
minute could be run- " absolutely exceptional figures, " he said.
Development of Siemens' H-class turbine involved 250 engineers,
scores of workers, and the construction and operation of a
prototype plant in Irsching that required an investment of €500
million ($734 million). The turbine was included in mid-2009 as
part of a combined-cycle facility by adding a bottoming steam
cycle featuring a heat-recovery steam generator and turbine operating
at 600C. The trial operation period is expected to be
completed this summer, when E.ON will take over commercial
operation of Irsching 4.
Siemens has sold six new 60-Hz versions of the plant to Florida
Power and Light, which is expected to receive them in 2012.
South Korean utility GS Electric Power and Services Co. has also
ordered a single-shaft combined-cycle plant featuring the 60-Hz
version, which is scheduled to go online in 2013.
Testing of MHI J-Series Also Makes Headway
Meanwhile, MHI in May announced it had achieved a gross thermal
efficiency that exceeds 60%, and " the world's highest turbine
inlet temperature " of 1,600C during test operation of its J-Series
gas turbine, which began in February this year at a verification
testing combined-cycle power plant at the company's Takasago
Machinery Works in Hyogo Prefecture. MHI said the accomplishment
marks final confirmation in the testing of the new 60-Hz
M501J, which MHI developed in the spring of 2009.
Theoretically, the higher a gas turbine's inlet temperature, the
greater is its thermal efficiency. The company claims that the turbine
outperforms the 1,500C-class G-Series turbine, which held
3. Massive possibilities. Test operation of Mitsubishi Heavy Industries'
(MHI's) J-Series gas turbines, the 60-Hz M501J, has shown
that it can achieve a gross thermal efficiency of more than 60% because
it is able to reach the " world's highest turbine inlet temperature
of 1,600C, " the company said in May. Courtesy: MHI
the record for the highest inlet temperature so far. The M501J has
also achieved a rated power output of about 320 MW and 460 MW
in gas turbine combined-cycle power generation applications, in
which heat-recovery steam generators and steam turbines are
also used (Figure 3).
MHI is now developing a 50-Hz version, the M701J gas turbine,
targeting first shipments in 2014. It adds that it will apply J-series
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POWER July 2011

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