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Power


Monthly Issue | March 15, 2006

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The Combined Cycle Users' Group (CCUG) was formed to address issues of importance to users, particularly the interactions among the major systems of combined-cycle power plants: the steam turbine, combustion…


A breakthrough in hydroturbine design

One of the distinguishing characteristics of deregulated power markets is variable demand. The ability to operate efficiently at partial loads can determine whether a plant is profitable or not. This…


Pearl Harbor cable links past, future

A new, mile-long submarine transmission cable in Pearl Harbor (Figure 3, p. 10) will facilitate the U.S. Navy's plan to renovate and expand historic Ford Island. Honolulu-based Hawaiian Electric Co.…


Russia says "da" to floating nukes

The Russian Federation plans to start building a floating nuclear power plant this year. According to the country's atomic energy agency (Rosatom), the first plant will be small (3 MW)…


Fluor completes Texas project

Fluor Corp. (Aliso Viejo, Calif.) has finished building and commissioning the 620-MW Jack County power plant (Figure 2) near Jacksboro, Texas, for Waco-based Brazos Electric Cooperative Inc. The natural gas–fired,…


Environmental quandary shuts Mohave plant

Southern California Edison (SCE, Rosemead, Calif.) closed the 1,580-MW coal-fired Mohave Generating Station in Laughlin, Nev., on December 31. In a filing with the California Public Utilities Commission (CPUC), SCE…


Poor Priorities

I couldn't help but marvel at the synchronicity of two unrelated events over the past few weeks. The first, on January 12, was the rare cancellation of a major military…


Fleetwide standardization of steam cycle chemistry

A major independent power producer's (IPP's) merchant fleet includes dozens of gas-fired combined-cycle plants of 3 x 1, 2 x 1, and 1 x 1 configurations. Nearly all have triple-drum…


Poor priorities

I couldn't help but marvel at the synchronicity of two unrelated events over the past few weeks. The first, on January 12, was the rare cancellation of a major military…


Designing HRSG desuperheaters for performance and reliability

Desuperheaters—often called attemperators—in heat-recovery steam generators (HRSGs) are located between the primary and secondary superheaters and reheaters, and sometimes after the final stage of superheating (Figure 1). They are responsible…


Map: Combined-cycle plants constitute about 20% of U.S. generating capacity

Copyright 2006 Platts, a Division of the McGraw-Hill Companies. All rights reserved. 800-PLATTS-8. Data Source: Platts Energy Advantage www.maps.platts.com


Stressed merchant industry hopes for better days

The boom-bust history of the U.S. electric power industry seems destined to repeat itself, with planned capacity additions for 2006 bottoming out at 17,756 MW—the lowest level in five years.…


Designing HRSGs for cycling

Users have learned—often, the hard way—that daily cycling reduces the life expectancy of hot components in gas turbines. For years, manufacturers of turbines have designed them to withstand the cumulative…


Hybrid generation markets endanger competition and innovation

Competition in power generation fosters technical innovation, cleaner power plants, and downward pressure on prices. Before the 1980s, such competition was almost nonexistent: vertically integrated utilities built and operated the…


U.S. wind capacity way up

Last year, the U.S. wind energy industry easily broke its record for new installed capacity. According to the Washington-based American Wind Energy Association (AWEA), nearly 2,500 MW of wind turbines…


Pearl Harbor cable links past, future

A new, mile-long submarine transmission cable in Pearl Harbor (Figure 3, p. 10) will facilitate the U.S. Navy's plan to renovate and expand historic Ford Island. Honolulu-based Hawaiian Electric Co.…


Russia says "da" to floating nukes

The Russian Federation plans to start building a floating nuclear power plant this year. According to the country's atomic energy agency (Rosatom), the first plant will be small (3 MW)…


Fluor completes Texas project

Fluor Corp. (Aliso Viejo, Calif.) has finished building and commissioning the 620-MW Jack County power plant (Figure 2) near Jacksboro, Texas, for Waco-based Brazos Electric Cooperative Inc. The natural gas–fired,…


Environmental quandary shuts Mohave plant

Southern California Edison (SCE, Rosemead, Calif.) closed the 1,580-MW coal-fired Mohave Generating Station in Laughlin, Nev., on December 31. In a filing with the California Public Utilities Commission (CPUC), SCE…


Include generators and exciters in your outage inspections

Over the past decade, since industry deregulation, the typical utility power plant has lengthened the maintenance intervals of its major systems to minimize downtime and costs. Many plants schedule spring…


O&M staff keep their cool at Alaskan plant

The name "Alaska" comes from the Aleut word "alaxsxaq," meaning "an object toward which the action of the sea is directed," in this case the Alaska Peninsula. But alaxsxaq is…


Gas turbine "refueling" via IGCC

From the mid-1990s until about four years ago, natural gas–fired combined-cycle plants dominated new capacity additions in North America. They became the technology of choice for all the right reasons:…


New day, new DCS

Each day, American Ref-Fuel's Massachusetts facility converts some 3,500 tons of municipal waste to electricity and transmits it to the regional grid. Three boilers and two turbines operate around the…


How leaking valves drain profits

INFORMATION TECHNOLOGY How leaking valves drain profits Identifying and then repairing leaky steam- and water-cycle isolation valves is a quick and cost-effective way to improve plant efficiency. Despite the obvious opportunities…


A breakthrough in hydroturbine design

PLANT SIMULATION A breakthrough in hydroturbine design One of the distinguishing characteristics of deregulated power markets is variable demand. The ability to operate efficiently at partial loads can determine whether a…


Designing wet duct/stack systems for coal-fired plants

As limits on SO2 emissions become tighter, many coal-fired utility power plants are adding new flue gas desulfurization (FGD) systems or upgrading existing ones. The majority of these systems employ…


Fluid dynamics of the HRSG gas side

For years, original equipment manufacturers (OEMs) of heat-recovery steam generators (HRSGs) have supplied distribution grids (DGs) as a means for controlling the undesirable velocities, temperatures, spin angles, and pulsations generated…


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