POWER

Ringing what may be the death knell for the $3.5 billion Taylorville IGCC project, the Illinois Senate voted 33-18 in early January against authorizing construction of a coal gasification and power generating plant proposed in the state by Tenaska.

If your facility has recently seen an upsurge in bearing failures on boiler feedwater (BFW) pumps, you are not the only plant experiencing these unnecessary and costly failures. The failure causes are often elusive, which is why plants have so many unresolved repeat failures.

Arizona Public Service’s (APS) plan to close three older coal-fueled units at the Four Corners Power Plant in New Mexico and buy out Southern California Edison’s 48% share of the two remaining units is a creative means of surviving the U.S. Environmental Protection Agency’s (EPA) committed action against coal-fueled generation.

Coal mining, and related industries that consume coal, have attracted quite a bit of attention from the federal government as of late. Most of that attention has focused on how to further, or "better," regulate the industry. The EPA is now moving to regulate downstream conductivity of surface mining runoff.

Designing large package boilers rated at over 400,000 lb/h steam production is a challenge because of shipping limitations within the U.S. and Canada.

All of our legal column writers have this issue off (they’ll be back in the March issue), so we are using this opportunity to invite readers to share their legal and regulatory (L&R) concerns.

On December 23, 2010, one day before the Yuletide season, when members of Congress, the media, and Tea Party activists are least likely to watchdog the federal bureaucracy, the U.S. Environmental Protection Agency (EPA) announced rulemakings to establish New Source Performance Standards (NSPS) for greenhouse gas (GHG) emissions from power plants and refineries. Or maybe "whispered" would be more accurate.

The 2009 blockbuster movie 2012 about a global cataclysm combined Hollywood special effects with supposed predictions by Nostradamus; a Mayan calendar that ends on December 21, 2012; and a very rare planetary alignment that supposedly occurs on the same day. Hollywood producers seldom let technical accuracy get in the way of a good story, but suppose, this one time, the story has an element of truth.

In the September and October 2010 issues, POWER Contributing Editor David Daniels explored the causes and damage mechanisms of condenser tube leaks (“Taming Condenser Tube Leaks,” Part I and Part II). Dennis J. Schumerth, Valtimet’s director of business development, took issue with several of Daniels’ statements regarding the proper use of titanium condenser tubes. We have given Schumerth the opportunity to express his concerns and for Daniels to reply.

An unintended consequence of employing selective catalytic reduction and wet flue gas desulfurization to reduce nitrogen oxide and sulfur dioxide levels at coal-fired power plants has been unwanted sulfur trioxide (SO₃) emissions. Picking the right sorbent in the right amount can eliminate that problem.

At Morgantown Generating Station, plant personnel used innovative methods to combine model predictive control with distributed control system–based process control algorithms to improve waterwall temperature control and main steam temperature control and to enhance unit ramp rate capability. The previous heat rate and NO_x optimization performance gains were retained. Focusing beyond basic loops of feedwater, air, and O₂, the project considered issues such as PID controller override configuration and limitations. The techniques used to overcome these challenges improved unit ramp rate capability beyond any previous unit performance.

MHI to Continue Pre-Construction Work for North Anna Unit. Mitsubishi Heavy Industries Ltd. (MHI), through Mitsubishi Nuclear Energy Systems Inc., and Dominion subsidiary Virginia Electric and Power Co. on Dec. 27 said they had reached an agreement to continue pre-construction, engineering, and planning work in preparation for a third unit at Dominion’s North Anna Nuclear […]

Development of Vogtle Electric Generating Station Units 3 and 4—the first new nuclear power plant units in the U.S. in decades—has generated considerable excitement. The next generation of nuclear plants, represented by these units, includes at least two major improvements: the use of passive safety systems and a reliance on digital control systems. The latter represents a gigantic leap in modernization and a fundamental change in control of the plant.

The Electric Power Research Institute has developed a pair of diagnostic tools that combine and integrate features from multiple sources of plant information. The Diagnostic Advisor and the Asset Fault Signature Database will improve diagnostics for and troubleshooting of equipment faults by providing a holistic view of the condition of plant equipment.

A common concern for gas turbine power plants is treating exhaust gases to comply with laws restricting pollutants present in the gases that are emitted into the ambient atmosphere. The challenge for designers is to control the exhaust gas operating temperature within a range that maximizes performance of the oxidation and reduction catalysts.

One important factor in power plant control system performance is the response time of the process measurement used in the control system. The response time of boiler steam temperature sensors and thermowells is examined, as is those sensors’ and thermowells’ effect on desuperheater temperature response time and, therefore, steam temperature control performance.

In the 1950s, temperature-equalizing columns were commonly used in steam drum differential pressure–based devices for measuring water level. However, these columns are problematic because a portion of the reference leg can flash to steam on a pressure decrease (load increase), and this will result in a temporary, false, high-level measurement, which adds to the swell effect. The columns can also result in measurement inaccuracies. It’s time to replace these antiquated instruments with a more modern reference leg.

Compared with other solid fuel–fired plants, the systems and components required for handling and processing biomass appear quite familiar, but important fuel differences must be considered. A successful biomass plant design must provide flexibility for handling the expected wide range of biomass fuel properties and characteristics.

By Kennedy Maize Washington, D.C., January 28, 2011 – The Senate Energy and Natural Resources Committee in the 112th Congress won’t be your father’s Senate Energy and Natural Resources Committee (and certainly not Lisa Murkowski’s father’s committee). With a slew of newcomers – mostly Republican – and none of them particularly attuned to the way […]

The fourth unit of India’s Kaiga Generating Station, a 220-MW indigenous reactor that achieved first criticality on Nov. 27, 2010, was synchronized to the grid last week. The unit now brings India’s nuclear power capacity to 4,780 MW with 20 reactors in operation, state-owned Nuclear Power Corporation of India Limited (NPCIL) said.

The U.S. Departments of Energy and Commerce on Thursday signed a memorandum of understanding (MOU) to collaborate further on renewable energy modeling and weather forecasting to help the renewable sector more effectively use the nation’s resources.

Uncertainty about U.S. climate policy direction means that Canada may need proceed with its own measures to mitigate climate change—including a carbon cap-and-trade system—a government-appointed advisory panel has recommended.

In his State of the Union address on Tuesday evening, President Barack Obama set a new goal for the nation: To obtain 80% of its electricity from “clean energy” by 2035. But his definition of “clean energy” included “nuclear, clean coal, and natural gas” as well as “wind and solar.”

A federal district court judge on Thursday sided with environmental groups in a suit against the Environmental Protection Agency (EPA) and gave the Obama administration only 30 extra days to issue Maximum Achievable Control Technology (MACT) rules for large and small boilers, and solid waste and sewage sludge incinerators—not a year, as the agency had sought.

The New Mexico Supreme Court today ruled unanimously that freshly elected Republican Gov. Susana Martinez violated the state constitution when she halted publication of cap-and-trade rules that were adopted by the state’s Environmental Improvement Board (EIB) last year.

The European Union (EU) on Tuesday said it was waiting for member countries to confirm that minimum-security requirements had been installed in their emissions registries before reactivating its emissions trading scheme (ETS). The European Commission halted spot carbon trading last week for at least seven days after hackers stole emission permits from accounts in the Czech Republic and Austria.

Massachusetts–based Beacon Power Corp. on Monday said it had energized and grid-interconnected the first 8 MW of flywheel energy storage at its 20-MW frequency regulation plant in Stephentown, N.Y., bringing in the first commercial revenue for the company.

NRG Energy last week received a $967 million federal loan guarantee for its 290-MW Agua Caliente thin-film photovoltaic (PV) solar project. When the Yuma County, Ariz., project, which began construction in 2010, is complete in 2014, NRG says it will be the largest PV generation facility in the world.

By Kennedy Maize Washington, D.C., January 24, 2011 — While many of us have fixated on electric approaches to vehicle propulsion, the U.S. Environmental Protection Agency has been working on another technology that may turn out to be a killer ap for conventional gasoline cars. Earlier this month, with little fanfare or hoopla, Chrysler announced […]

The National Institute of Standards and Technology (NIST) has developed smart grid cybersecurity guidelines as tasked by Congress, but major gaps still need to be addressed; furthermore, the Federal Energy Regulatory Commission (FERC) has failed to develop a coordinated approach for monitoring if and how the standards are being followed by industry, a new report from the Government Accountability Office (GAO) says.