POWER

You may be surprised to learn that even with the increased demand for biomass fuels for power generation, construction and demolition fuel is classified as solid waste, not biomass. Reconsidering this designation is critical as U.S. environmental regulations tighten emission profiles for solid waste combustion units and renewable portfolio standards expand.

A newly announced resource strategy could require Duluth, Minn.–based Minnesota Power to convert its 110-MW Laskin Energy Center in Hoyt Lakes, Minn., to a natural gas peaking facility in 2015, install environmental upgrades at its 558-MW Clay Boswell Energy Center Unit 4 in Itasca County, and retire one of three coal-fired units at its 225-MW Taconite Harbor facility in Schroeder.

The U.S. saw the historic start of operations at its first ultrasupercritical coal-fired power plant last December as Southwestern Electric Power Co.’s (SWEPCO’s) 600-MW John W. Turk, Jr. Power Plant switched on in Arkansas.

Large vacuum cups from Vi-Cas Manufacturing are available in sizes up to 15 inches in diameter to lift and manipulate large, bulky, or cumbersome materials, including fabricated assemblies. Round, rectangular, or oval cups are available from stock for a variety of lift manufacturers. Sizes and types are available to fit virtually any type of vacuum […]

A landslide victory handed by Japanese voters to the Liberal Democratic Party (LDP) in mid-December saw power in the country’s Lower House shift back to the nationalist-conservative party that had governed Japan almost continuously since 1955. The LDP had been ousted in a historic defeat only three years earlier. In his first televised interview since taking office, newly elected Prime Minister Shinzo Abe (who previously served as prime minister from September 2006 to September 2007) called for review of plans to phase out nuclear power in Japan by 2030, endorsing instead the construction of new, safer nuclear power plants.

The electricity industry is being transformed by the so-called “shale gas revolution” in the United States. Production of natural gas from shale rock using hydraulic fracturing (“fracking”) has boosted supply and reduced prices, making gas-fired power competitive with coal-fired power on price. Historically, coal-fired electricity generation has dwarfed generation from gas-fired plants in the U.S. […]

Accurate knowledge of the water level in any boiler drum application is an absolute necessity. While operating a boiler with low water level is one of the leading causes of boiler failure, operating with a high water level may produce less-than-optimal steam, as well as damage to the steam turbine by moisture carryover.

Last October, the Federal Energy Regulatory Commission (FERC) announced that it was seeking a record $470 million penalty against Barclays Bank for manipulating California energy markets for several years in the late 2000s. The amount includes a $435 million fine as well as disgorgement of $35 million in profits Barclays gained from allegedly illegal trading. In addition, FERC levied hefty fines against several individual Barclays traders.

Improper layup practices are a major contributor to boiler tube failures and to steam turbine pitting and cracking in U.S. fossil plants. EPRI’s research into identifying damage mechanisms, utility best practices, and innovative new methods to protect plant equipment during outages will aid plant operators in achieving a successful layup.

Many recent utility greenfield and rehabilitation power projects have incorporated plant automation, with the goal of reducing the number of operators needed. The essential design principle is to specify control systems and field devices that will achieve the desired operational regime. Here’s how it’s done “Down Under.”

The increased use of intermittent renewable energy sources and the shift to gas-fired combustion turbines places new burdens on the dispatch of many coal-fired units. Steam units must now operate at very low minimum load while maintaining the ability to ramp up and down quickly. High-pressure feedwater heater energy control can improve the system response of such coal-fired units.

Mismatched or poorly maintained temperature sensors and thermowells can cause an often-unrecognized error in steam temperature measurement. The problem is often recognized only when sluggish steam temperature response times are noticed. Recent tests suggest some simple ways to resolve the problem.

Many power plants have sediment retention ponds that require control of pH for the effluent. The following guidelines for fossil plant sediment pond pH control will help you design a robust system while staying within budget.

Rick Tempchin, executive director, Retail Energy Services for the Edison Electric Institute, talks about the impact of distributed energy resources on utilities and their customers.

Final water intake structure rules from the EPA expected this June suggest the agency may be listening to industry and even moderating its tone. Stretch goals as part of the Section 316(b) rule are likely, but overall the rule may prove more reasonable than many expected.

ESAB Welding & Cutting Products introduced Warrior, a new multiprocess power source and feeder designed for processes including energy generation construction, pipe welding, general fabrication, and repair and maintenance. Designed for GMAW (MIG), FCAW (flux-cored), SMAW (stick), and GTAW (TIG) welding as well as ACAG (arc gouging), Warrior delivers up to 500 amps at 60% […]

As the book title Too Dumb to Meter: Follies, Fiascoes, Dead Ends, and Duds on the U.S. Road to Atomic Energy implies, nuclear power has traveled a rough road. In this POWER exclusive, we present the 14th and 15th chapters, “A Man, a Plan, a Canal” and “The End of the Exploding Game,” the final two chapters of “Eddie Teller’s Exploding Ambitions” section.

The VAC-U-MAX self-contained granular activated carbon (GAC) delivery system is mounted on a self-contained skid. This system is a complete prepackaged dilute phase pneumatic conveyor system to deliver or remove GAC from scrubber towers and holding tanks. Tubular probing wands, convey hose, filter receiver, vacuum pump, and control panel are included. (http://www.vac-u-max.com)

In case you neglected to mark it on your calendar, the Kyoto Protocol to the U.N. Framework Convention on Climate Change (UNFCC) expired at midnight on New Year’s Eve. The 15-year-old treaty was by every account a failure. Global carbon dioxide emissions are up over 50%, yet global temperatures decreased over the same period. Relying […]

Mott Corp. announced the availability of porous metal components and filters in a variety of refractory metal alloys including zirconium, titanium, tungsten, molybdenum, and niobium. Known for outstanding chemical resistance, high strength, and thermal stability, refractory metals can meet the most demanding operating conditions. Mott can design porous components or entire filter assemblies using refractory […]

The new Torrent 50 tank-cleaning head from NLB Corp. delivers 3-D water jet action with the force of 600 horsepower water, and it fits through a tank or reactor opening as small as 6 inches. The Torrent 50, rated for pressures up to 20,000 psi and flows to 50 gpm, has two high-velocity water jets […]

Progress in electronics and information technology has created incentives to replace traditional analog instrumentation and control (I&C) systems in nuclear power plants with digital I&C systems, or systems based on computers and microprocessors. About 40% of the world’s operating reactors have been modernized to include at least some digital I&C systems, according to the International […]

Larson Electronics’ Magnalight.com has introduced the HBLP-1MLED-SWAM stainless steel swing arm–mounted, explosion-proof light for wastewater treatment plant applications. Built with 316 stainless steel and equipped with a Class 1 and Class 2 Division 1 10,000-lumen LED light, this adjustable hazardous area light is designed for corrosive environments. The HBLP-1MLED-SWAM is used to position the explosion-proof […]

Wisconsin Energy nearly doubled its natural gas burn for power generation in 2012, from 23.9 billion cubic feet (bcf) in 2011 to 46.5 bcf in 2012. Gale Klappa, CEO, said during a January 30 earnings conference call that natural gas units at the company’s 1,150-MW Port Washington generating station operated at a 46% capacity factor in 2012. This compares with a 23% capacity factor in 2011.

A proposal released by the Environmental Protection Agency (EPA) on Friday could require owners of the 2.3-GW coal-fired Navajo Generating Station (NGS) near the Arizona-Utah state line to install emission controls worth $1.1 billion to improve visibility at 11 national parks and wilderness areas in the Southwest.

Among the surprises in President Barack Obama’s second Inaugural Address on Monday was his promise to address the challenges of climate change and sustainable energy. An independent draft report released about a week earlier on climate change and its impacts in the U.S. may have helped to fuel his renewed resolve on these intertwined issues.

The availability and low price of natural gas enticed many U.S. utilities to fuel switch on a grand scale in 2012. Increased demand has put upward pressure on prices, moving coal back to the top of the dispatch order in some regions. Expect the price momentum to shift often in 2013.

Exports of natural resources have given Russia increased global political and economic clout. But domestically, the world’s fourth-largest generator of electricity has had to embark on the most ambitious reforms ever undertaken to modernize dilapidated Soviet-era power infrastructure and incentivize a massive capacity expansion to support a revived economy.

Navigant’s Operational Excellence Awards are presented annually to those North American coal-fired generation plants that have demonstrated excellence in cost-efficient reliable plant performance over the preceding five-year period. The data used to select the winners derives from Navigant’s Generation Knowledge Service fossil database.

Solar flares have proven destructive effects on transmission grids, but there are many other “black swan events” that threaten modern civilization. Experts disagree about which protective steps should be taken today.