Technology:
In coal fired power
generation, generating efficiency increases and CO2 emissions decrease as the
burning temperature increases. However, materials built by the existing
technology can endure a temperature up to 600 degrees centigrade. Hitachi and
Tohoku University jointly developed a technology to build a material that can
endure a temperature up to 800 degrees centigrade and reduce CO2 emissions by
20%. They added metals including cobalt to the alloy material to increase the
heat resistance of the new material, using Tohoku University’s technology on metallic
compounds. The new material will be used for parts that require a high degree
of heat resistance, such as turbine and boiler tube. They plan to put the
technology into practical use in 2020 to build a steam turbine plant resistant
up to 800 degrees centigrade for the first time in the world.
The newly developed
technology increases the generating efficiency of coal fired power generation
from 40% to 50% and decreases the CO2 emissions 20% to about 700 grams per
output of 1 kW. Because oil thermal power generation emits about 740 grams per
output of 1 kW, coal fired power generation resistant up to 800 degrees
centigrade emits less CO2 emissions than oil thermal power generation. And it
is even close to LNG thermal power generation that emits about 600 grams per
output of 1 kW. World generation capacity of coal fired power generation will
supposedly increase 60% over the level in 2008 to 5 billion kW in 2030. The
business involved in coal fired power generation is expected to grow further in
countries rich in coal resources, such as the U.S., China, and India, whereas LNG
thermal power generation will be widespread in Japan. Hitachi is considering
combining the new heat resistant material with CO2 recovery equipment to increase
the competitive edge of the new technology.
The new technology
makes equipment more heat resistant and
allows for efficient power generation with decreased CO2 emissions.
allows for efficient power generation with decreased CO2 emissions.
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