Mitsubishi Hitachi Power Systems (MHPS) has announced that a JAC-series gas turbine using Enhanced Air Cooling has surpassed 8000 cumulative hours of combined cycle operation at the company’s T-Point power plant in Takasago, Japan. Exceeding 8000 hours of commercial operation is widely taken as an industry benchmark for demonstrating a gas turbine’s reliability, says MHPS.

The original J-Series, employing steam cooling for the combustor, was launched in 2009 and achieved 8000 hours of commercial operation in 2011. To improve efficiency and operability, MHPS then introduced an air-cooled combustor with Tohoku Electric Power Co, which resulted in the JAC gas turbine. To further improve the JAC, MHPS then developed Enhanced Air Cooling, which has just achieved 8000 hours of operation.

In total, 55 J/JAC turbines have been ordered globally and an additional 16 have been “technically selected” by power generation customers. Some 28 J-series turbines are now in commercial operation, accumulating over 600 000 hours of commercial operation. The MHPS practice of demonstrating 8000 hours of commercial operation before introducing new products to the market “has resulted in the industry’s most reliable products”, MHPS claims, with these 28 turbines “having demonstrated 3rd party verified industry-leading reliability of 99.3%.”

In a 1×1 combined cycle configuration, a 60 Hz JAC based power plant has a generating capacity of over 600 MW, providing over 64% fuel efficiency and 99.5% reliability. 

MHPS says that, based on McCoy data, the JAC has achieved the biggest global market share for gas turbine orders so far in 2018.

Suncor Energy has recently issued a letter of intent to purchase two JAC machines with HRSGs for a cogen facility at the company’s base plant oil sands mine near Fort McMurray, Alberta, for bitumen and power production.

Natural gas will be used to generate up to 800 MW of electricity using the JAC gas turbines. Waste heat from the gas turbines is used to create steam, which is used to heat the oil sands to separate the sand from the bitumen.