Development Completed on New MACH Gas Engine Series Compatible Gas Engines for Dispersed Power Generation |
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 MHI has succeeded in the demonstration
testing of the MACH 30 G at Kanazawa Plant of Yokohama Dockyard & Machinery
Works, which features the world's highest efficiency and lowest NOx emissions.
This new gas engine was developed
based on the KU30 series diesel engine, which has a delivery record of 250 units
and has logged more than 100,000 hours of operating time. The new gas engine covers
an output range of 3,800 to 5,750 kW.
The name MACH comes from the acronym for Mitsubishi Advanced engine of Clean &
High-efficiency.
Previously, gas engine output
was about 70% of that of diesel engines of similar size. However, MHI successfully
raised the output of its new engines to that of diesel engines, and implemented
radical standardization measures, such as compact enclosure equipment, to reduce
equipment costs.
Technically, improvement of
heat efficiency tends to deteriorate NOx values, and previously achieving both
goals was difficult. However, by changing the ignition system from one using an
ignition plug to one adopting a new electronically controlled common-rail fuel
injection system, and a variable geometry turbocharger and a new model piston,
the world's highest generation efficiency (42.5%) and lowest NOx emission (100
ppm or less (02=0%), 24 ppm or less (02=16%)) were achieved.
In addition, winning by a wide
margin in efficiency over the small gas turbines and cheng-cycle gas turbine that
have been the focus of attention recently, this new gas engine scores highly in
environmental metrics, reliability, cost and maintenance fees.
The new series is anticipated to become the core of future fuel-compatible power
generation facilities.
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