MPSA Successfully Completes SCR System Performance Testing at Large-scale Gas
Turbine Power Generation Plant in the U.S.
Milestone Achievement for 200MW Class Simple-Cycle Gas Turbine
Tokyo, July 30, 2013 - (JCN Newswire) - Mitsubishi Power Systems Americas,
Inc. (MPSA), the business base for Mitsubishi Heavy Industries, Ltd. (MHI)
power systems operations in the U.S., has successfully completed verification
testing of a large-scale Selective Catalytic NOx Reduction (SCR) system, which
is to be installed at an 800 megawatt (MW) large-size gas turbine simple-cycle
power generation plant. The testing was performed at the Marsh Landing
Generating Station in Antioch, California, site of four 200MW gas turbines, and
MPSA's SCR system reduced gas emissions, including nitrogen oxides (NOx)
and ammonia, within compliance limits. The event marks a milestone achievement
for the SCR system, demonstrating its capability to meet emission limits with a
200MW class simple-cycle gas turbine.
The Marsh Landing Generating Station is situated in the San Francisco Bay
Area, where some of the world's most stringent air quality control limits
are imposed on emissions of NOx, ammonia, carbon monoxide (CO), volatile
organic compounds and particulate matter. MPSA's SCR system successfully
demonstrated the ability to keep within emission limits during quick starts and
load changes and with gas turbine loads across the entire 0% to 100% range.
The SCR system tested features a system to cool the gas turbine exhaust gas
from approximately 600 degrees centigrade (degree Celcius) to below 460 degree
Celcius. The cooling system was achieved by introducing technology that
uniformly mixes hot exhaust gas and air-the coolant-and by utilizing a
structure that protects ducts through which air is directed to the exhaust gas
from the thermal stress. Also adopted in the SCR system are new structural and
control systems designed to accommodate quick starts and load changes, and an
ammonia vaporization system that utilizes exhaust heat.
The Marsh Landing Generating Station was built as a backup power plant to meet
fluctuations in large-scale renewable energy power generation and peaks in
power demand. Recently, there has been a sharp increase in the need to develop
energy sources for backup and power peaking in order to cope with heavy demand
in summer. Conventionally, small-size gas turbines and gas engines have mainly
been adopted in backup power plants; however, deployment is gradually
increasing of large-scale backup plants like the Marsh Landing Generating
Although the newly tested SCR system is for a gas turbine simple cycle power
generation system-and not for a gas turbine combined cycle (GTCC) system, which
uses a gas turbine and steam turbine in combination to generate power-the
successful test results will lead to further adoption of the SCR system to meet
emission controls on large-scale gas turbine simple cycle power generation
plants, which are widely used in the U.S. The SCR system is also expected to be
in demand in new backup power plants for renewable power generation and scaling
up of plants to accommodate power peaks.
MHI is a pioneer in NOx emission control technology, having supplied more than
600 SCR systems worldwide. For more than 40 years, the company has provided
advanced emission control systems for power boilers, gas turbines, refineries
and process heaters burning all forms of liquid, gas and solid fuels.
Going forward, MHI will continue to proactively respond to diverse emission
control needs, including those imposed on large-scale gas turbine power
About Mitsubishi Heavy Industries
Mitsubishi Heavy Industries, Ltd. (MHI), headquartered in Tokyo, Japan, is one
of the world's leading heavy machinery manufacturers, with consolidated
sales of 2,820.9 billion for the year ended March 31, 2012. MHI's diverse
lineup of products and services encompasses shipbuilding, power plants,
chemical plants, environmental equipment, steel structures, industrial and
general machinery, aircraft, space rocketry and air-conditioning systems. For
more information, please visit the MHI website at www.mhi.co.jp.
Mitsubishi Heavy Industries
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