The engineering, procurement and construction (EPC) contract signed with the Electricity Generating Authority of Thailand (EGAT) is €950m ($1bn) in value.
The consortium will build a new 600MW unit to replace the existing units 4-7 at the plant.
Owning a share of approximately €520m in the contract, Alstom supply its technologies including the ultra-supercritical boiler with integrated selective catalytic reduction of NOx (SCR), and ultra-supercritical steam turbine and generator.
The company will also provide air quality control systems, which feature a wet flue gas desulphurisation (WFGD) system for the reduction of sulphur oxides by more than 98%, and electrostatic precipitators (ESP) to capture particulate and dust emissions.
Marubeni will supply the remaining of plant equipment and will be responsible for civil/installation works.
Located in the northern Thai province of Lampang, the plant currently has 4-13 units operational. These were also commissioned by Alstom and Marubeni.
The new unit is scheduled to be completed in 2018. It will make Mae Moh the first lignite-fired power plant operating with ultra-supercritical conditions in Asia.
The new unit will result in enhanced overall plant efficiency, increased power output as well as reduction of more than 20% in CO2 emissions per unit of fuel burned compared to current installations, the partners said.
Image: Illustration of ultra-supercritical lignite-fired power plant. Photo: Alstom.
