COMBINED CYCLE

FUJAIRAH F3 COMBINED CYCLE POWER PLANT PURCHASES NEW GAS TURBINES

Mitsubishi Power, an arm of MHI, has installed three M701JAC gas turbines to the Fujairah F3 combined cycle power plant in the UAE - the turbines come from its Takasago

Machinery Works in Hyogo Prefecture, Japan. The 2.4 GW plant will be the largest natural gas fired

GTCC facility in the UAE, playing a crucial role in the country’s power generation sector, while also contributing to the GCC’s power grid. The M701JAC operates at an efficiency greater than 64%, is given a reliability rating of 99.6%, and is said to be the lowest emitter of carbon-dioxide emissions per unit of power when used in combined cycle. It is capable of operating on a mixture of up to 30 % hydrogen and 70 % natural gas and can be converted to 100 % hydrogen firing. This is a cutting-edge high-capacity gas turbines for 50 Hz power generation incorporating state-of-the-art technologies The J Series gas turbines are an integration of the proven G Series and elemental technologies for temperature increase as a result of the Japanese national project for development of 1,700°C class gas turbines. They operate at a turbine inlet temperature of 1,600°C. Developed as a model with a similar design, the

M701J Series for 50 Hz power generation began commercial operation at the beginning of 2016. The M701JAC Series gas turbines adopt air cooling for combustors instead of steam cooling. With performance equivalent to the M701J Series gas turbines, they produce a high level of operability including a shorter startup time. Overall Design: the gas turbine unit is based on the basic structure adopted in the early 1970s that has accumulated a track record of at least 40 years. Its main features are as follows: -A compressor shaft end drive reduces the effect of thermal expansion on alignment -A rotor with simple single-shaft two-bearing support -A rotor structure has bolt-connected discs with the torque pins in the compressor section and CURVIC couplings in the turbine section to ensure stable torque transmission -An axial flow exhaust structure advantageous in combined cycle plant layouts -Horizontally-split casings that facilitate field removal of the blades with the rotor in place

Compressor: Advanced three-dimensional design techniques are used to improve performance while reducing the shockwave loss in the initial stages and frictional loss in the intermediate and final stages. The inlet guide vanes and variable stationary vanes at the first three stages are controlled to ensure stable operation at the start-up and enhanced performance at partial load in combined cycle operation. Combustor: The J Series combustor is based on the steam cooling system proven with the G Series. An improved fuel nozzle is used to help produce a more homogeneous mixture of fuel and air. Despite the rise in turbine inlet temperature, the combustor attains NOx emission concentration equivalent to that of the G Series. Incorporating air-cooled combustors, the JAC series adds operational flexibility by eliminating any need for steam cooling from the bottoming cycle. Turbine: The turbine inlet temperature is 100°C higher than that of the G Series. However, the application of high performance cooling technologies developed in a Japanese national project for the development of 1,700°C class gas turbines and advanced thermal barrier coating (TBC) helps to maintain the metal temperature of the turbine blades at the level of conventional gas turbines. These generators will be the core units of the F3 plant, owned and operated by Fujairah Power Company F3 LLC, a special purpose company (SPC) jointly owned by Abu Dhabi National Energy Co (TAQA), Mubadala Investment Co, Marubeni Corp Hokuriku Electric Power Co. The plant is being built by the South Korean firm Samsung C&T Corporation. The 2020 order included the core equipment for the new plant, along with auxiliary machinery and accessory equipment, which is being built in a coastal area of Fujairah (Qidfa), approximately 300 km NE of the UAE capital Abu Dhabi. Its generation capacity of 2400 MWe will be the highest output ever for a gas- fired GTCC plant in the UAE. Full commercial operation is scheduled for 2023. Mitsubishi Power is also dispatching engineers to provide support until the start of commercial operations, and, under a Long-Term Service Agreement for the project, will handle maintenance and repair of the generating facilities. Commenting on the contract, Khalid Salem, president of Mitsubishi Power MENA (Middle East & North Africa) and GTCC Business Unit Leader for EMEA, said: “This project is the first in the Middle East to utilise our advanced JAC-Series gas turbines which boast the world’s highest level of generating efficiency”.

power.mhi.com

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