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Power generation using biomass, which is a recyclable
energy source, is rapidly spreading in Japan and abroad.
In addition, the tendency toward larger power generation
facilities is progressing at sugar factories, which have
used biomass-based power generation for many years.
Formerly, those plants generated electricity only during
the sugar production period in order to use the discharged
steam for the manufacturing process using a backpressure
turbine. However, those generators are being replaced with
larger generators capable of generating electricity throughout
the year by using an internally controlled extractioncondensing
turbine, instead of a backpressure turbine.
With these large generators, sugar factories use extracted
steam for the manufacturing process during the sugar production
period. During other periods, however, all steam is
condensed into water and used exclusively for generating
electricity. Since these generators use bagasse, a byproduct
of sugar manufacturing, for their fuel, selling electricity
is becoming a new business that earns a large profit for
those sugar factories. This paper introduces the development
of a steam turbine for 34MW biomass power generation,
which is one of Shin Nippon Machinery's largestclass
turbines, for sugar factories in Thailand. |
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