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The new combined cycle benchmark; 65% efficiency
We are using the thermodynamic power cycles everyday to better our lives. The old benchmark of 60% combined cycle efficiency established in 1982 has been broken, and a new benchmark of 65% is now being established to be achieved in the next decade. Already the signs are there to reach halfway in just three or four years. All of the gas turbine companies are now working on their all new "J" model designs.
Mitsubishi Heavy Industry has said that their first "J" machine will fire at 2912o F to give 61% combined cycle efficiency. A more advanced model will have a firing temperature of 3092 o F for a combined cycle efficiency of 62 to 64 %.



US adding over 530MW of energy storage capacity
Energy storage technology holds the promise to provide many benefits across the energy delivery value chain — from generation to transmission and distribution (T&D) to end-users. This technology is considered a key component for integration of high levels of renewable energy penetration and as an essential tool for smart, future electricity grids. It has additional benefits, such as, reducing emissions, serving as an alternative to a traditional generation plant, or acting as a tool for demand response, can be captured with the deployment of storage technologies.

Siemens acquires major stake in UK tidal power company
Siemens has recently acquired Marine Current Turbines Ltd., the UK company based in Bristol, which develops and builds tidal power systems. The worldwide potential for power generated by tidal power plants is estimated at 800 terawatt-hours (TWh) annually. That is approximately 25 percent more than the total power demand of Germany and is equivalent to 3-4 percent of global power consumption.




Nov / Dec 2011

DESIGN AND OPERATING CONSIDERATIONS FOR COMBINED CYCLE PLANTS
Edwin A. Giermak
Sargent & Lundy Engineers

Uncertainty in today's energy market comes from many directions. This includes prevailing economic conditions, volatility of fuel prices, changing regulation of emissions, varying supply and demand as related to capacity margins, and unfavorable public perception of coal and nuclear technologies. ...

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