have increased the demand for Mitsubishi products and services by providing our customers with one of the most reliable and durable machines on the market. Our units’ ability to consistently deliver during startup provides great financial benefit and peace of mind.

It is not uncommon to find that advanced gas turbines display high efficiency but perform poorly in terms of reliability. Mitsubishi’s G fleet is an exception, incorporating a large variety of advanced

features, such as steam cooling, while exhibiting a fleet-equivalent availability factor of 96 percent and startup reliabilities exceeding 99 percent.

Boyce: Using the proven technology of the SGT6-5000F in both simple cycle and combined cycle operation, Siemens is able to achieve a product portfolio that will fit with any customer need. This simplified portfolio allows for operation from peaking to continuous load with the use of proven technology. Siemens also has a strong service

history with this line of products and is able to support the needs of customers from the generation side as well as the service side.

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PE: The amount of wind capacity in several North American regions is increasing the need for ancillary services and capacity support for intermittent renewables. That means more gas-fired backup. How are you meeting this need?

Fukumoto: The intermittent nature of wind is creating a need to have power available quickly when the wind isn’t blowing. Natural gas-fired turbines are a proven, reliable and “to scale” means of meeting this quick demand. Ramp rate (meaning MW/minute) is a key differentiator for wind-farm generation. Depending on the gas price, the technology selection can range from simple-cycle frame gas turbines, to aeroderivatives, to storage units. GE is able to offer the alternative technology and controls capabilities to integrate these solutions.

Adams: In addition to improvements in gas turbine technology to quickly respond to short notice demand of gas fired generation, Mitsubishi Heavy Industries is developing high efficiency hybrid systems that combine fuel cells and gas turbines that can operate on natural gas. Small-scale products in the range of 75 k W are currently in operation in Japan and will lead the implementation of larger-sized combined systems.

Boyce: The increasing concern for the environment is the primary driver for the rise in wind energy. Siemens has addressed the need for cleaner, more efficient gas-fired backup with the SGT6-5000F, which offers fast-start capabilities of 150 MW in 10 minutes and baseload GT power in 12 minutes. This results in lower fuel consumption on startup, 9 ppm NO_X control by way of an advanced ultra low NO_X system coupled with conventional SCR technology if necessary, thus significantly reducing startup emissions and complying with stricter air requirements.

When this technology is used in combined cycle application, the plant also minimizes water consumption by utilizing air cooled components. The Siemens portfolio of plant solutions offers environmentally sound alternatives to fill the gap in renewable energy.

 

Editor’s note: Watch for our upcoming June issue, which features an industry roundtable discussing latest utility-scale steam turbine technology.

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