Archive: Gas

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Georgia Power Adds Second 840-MW Gas Unit

The second of Georgia Power’s three natural gas combined cycle units at Plant McDonough-Atkinson in Smyrna, Ga., came online on April 26 (Figure 7). The first unit at the plant became operational in December 2011, and the third unit, currently under construction, is expected to come online in November 2012, increasing the plant’s capacity from […]

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Innovation Required as Gas Displaces Coal

Panelists at the ELECTRIC POWER Keynote and Roundtable Discussion in Baltimore in May wrestled with a range of issues. But despite calls for a “balanced portfolio,” an “all-of-the-above” energy strategy, and predictions of “more changes in the next 10 years than in the last 100,” the focus of attention appears to be the decidedly mundane displacement of coal by natural gas.

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Performance-Based Cooling Water Treatment

A West Coast combined cycle plant that uses reclaimed water found that cycling 300 times a year caused disruptions to the plant’s cooling water chemical treatment program. The solution was a performance-based monitoring and control system that uses available plant operating data plus algorithms to measure corrosion rates and fouling factors, which in turn allows the plant to trim chemical feed rates so they correlate with a specified corrosion rate, rather than a suggested chemical residual.

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Power in India: Opportunities and Challenges in a Fast-Growing Market

India’s long-term annual economic growth rate is projected at over 7%, and the country is investing in its hydroelectric, nuclear, and renewable resources. However, the primary fuel used to produce electricity remains coal, and the government has ambitious plans to significantly increase coal-fired capacity. Those plans have been challenged by a number of unexpected factors that threaten to stifle India’s economic growth. India’s long-term annual economic growth rate is projected at over 7%, and the country is investing in its hydroelectric, nuclear, and renewable resources. However, the primary fuel used to produce electricity remains coal, and the government has ambitious plans to significantly increase coal-fired capacity. Those plans have been challenged by a number of unexpected factors that threaten to stifle India’s economic growth.

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Startup Purge Credit Benefits Combined Cycle Operations

Combined cycle power plants use fuels and other materials that can cause fires or explosions in the combustion turbine, ducting, or heat recovery steam generator. Purging that equipment with ambient air to displace residual combustible gases before starting is a normal safety practice. But when plants are cycled, the disadvantages of purging often outweigh the advantages.

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Japan Scrambles to Revamp Its Electricity Sector

The March 2011 Japanese earthquake and tsunami that destroyed a number of Japanese power plants—most notably, four nuclear units—hit quickly. Almost as speedy were calls to take all other nuclear units out of service for safety reviews. What will take much longer is developing a new, sustainable energy plan to fill the generation gap left by a potential total lack of nuclear power.

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Unconventional Gas: The Great Game-Changer

Dr. Daniel Yergin, chairman of IHS Cambridge Energy Research Associates, is a Pulitzer Prize–winning author; leading authority on energy, international politics, and economics; and a recipient of the United States Energy Award for “lifelong achievements in energy and the promotion of international understanding.” He recently spoke with POWER about his latest book—and more.

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The Quest at CERAWeek 2012

In March, Cambridge Energy Research Associates hosted its 30th annual CERAWeek, a conference that is renowned for high-profile attendees from around the world.

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TVA Begins Operation of John Sevier CCGT Plant

The Tennessee Valley Authority (TVA) has begun commercial operation of the natural gas–fired 880-MW John Sevier Combined Cycle Plant, located near Rogersville, Tenn.