POWER

News items of interest to power generation professionals.

Researchers at the Massachusetts Institute of Technology (MIT) looking into new power generation cycles have designed an innovative oxyfuel system that uses a pressurized coal combustor to capture and concentrate carbon dioxide emissions for direct injection into deep geological formations.

Recent Nuclear Regulatory Commission (NRC) Component Design Bases Inspection activities have scrutinized empirical approaches used to determine vortex allowances for emergency core cooling system (ECCS) suction sources.

Denmark in September inaugurated a 209-MW offshore wind park — the world’s largest to date — off the west coast of Jutland, in the North Sea.

In September, the Second Circuit Court of Appeals reversed the district court ruling in Connecticut v. American Electric Power ("Decision"), a lawsuit initiated by eight states, New York City, and environmental organizations against six power-generating utilities. The plaintiffs allege that carbon dioxide emissions from the defendants’ fossil fuel – fired power plants in 20 states are contributing to a public nuisance — climate change and global warming.

In 2007, Exelon Corp. began the Centralized Performance Monitoring (CPM) pilot program. The goal was to reduce downtime costs and lost revenue associated with the 25% of unplanned forced losses across its fleet of 17 nuclear power units without additionally taxing existing personnel or adding new personnel.

Diablo Canyon Power Plant, which is situated in a postcard-perfect location on the central California coastline, generates electricity for more than three million households in central and northern California. In 2009 the project team at the dual-unit Westinghouse pressurized water reactor facility replaced four steam generators at Unit 1 in just 58 days. Through meticulous planning and excellent project execution, performance on this Unit 1 project was an improvement on the earlier Unit 2 steam generator replacement project.

Corrosion of steel water pipes in the safety-related piping systems of aging U.S. nuclear power plants is fast becoming a safety concern and a significant operational cost, not to mention an indication of potential future liability for nuclear utilities currently constructing new plants or retrofitting existing sites.

News items of interest to industry professionals.

A reusable organic liquid developed by the U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) to remove carbon dioxide (CO₂) or sulfur dioxide (SO₂) from power plant emissions could one day replace current scrubbing methods and allow power plants to capture the gases in a cost-efficient way that uses no water and less energy.

When high-temperature boiler feedwater passes through a control valve, the pressure drop can exceed several thousand pounds per square inch, placing extreme stress on the valve body and internal parts. If those parts are not engineered and manufactured to the highest industry standards, there is a very real possibility of the severe conditions damaging or destroying the valve.

Since Robert Stirling invented the Stirling engine in 1816, it has been used in an array of specialized applications. That trend continues today. Its compatibility with clean energy sources is becoming apparent: It is an external combustion engine that can utilize almost any heat source, it encloses a fixed amount of a gaseous working fluid, and it doesn’t require any water — unlike a steam engine.

For several years there has been widespread doubt about Washington’s ability to move forward with a national program to address climate change and reduce greenhouse gas (GHG) emissions. At various times during the Bush administration, it appeared that legislation might be possible, but it always collapsed under the weight of partisan politics and competing special […]

Italy’s Enel said in August that it has successfully begun operating a power plant in Fusina, near Venice, in the Veneto region of Italy, that is fueled 100% by hydrogen. The industrial-sized plant’s building site was officially opened in April 2008, after which infrastructure and technology work was carried out on schedule. Initial testing of the turbine using methane gas was conducted in the spring of 2009, and now — after completion of the special pipeline — the plant has switched to 100% hydrogen fueling, Italy’s largest energy company said.

When TVA’s Bull Run Fossil Plant was erected in the mid-1960s, it could boast of having the largest boiler in the U.S., and the plant has enjoyed a long, enviable efficiency track record. Today the public judges coal plants by their emissions. Now that it’s been outfitted with the most advanced air quality control systems, including the latest flue gas desulfurization system design, Bull Run scores a perfect "10" in both categories.

Africa is emerging as a prominent voice in calling for a global nuclear renaissance. Driven by chronic shortages from population explosions, decades of drought, and dependence on hydropower — and spurred by discoveries of significant uranium reserves on the continent — several countries are considering nuclear power as a viable option.

Hirakud Power uses environmentally friendly circulating fluidized bed (CFB) combustion technology to produce electricity for one of the world’s oldest aluminum-smelting operations. This "captive power plant" has engineered a number of technical fixes to its original boiler designs to improve plant reliability and reduce outages and boiler repair costs. It also has made strategic investments in upgraded machinery to reduce auxiliary power consumption. In addition to an excellent environmental track record, as evidenced by being Asia’s first ISO 14001 (BS 7750) – certified power plant, Hirakud Power has solidified its position as an industry leader in CFB boiler operating experience and efficient power production.

A solar thermal demonstration power plant in Jülich, Germany, that was developed by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR), was formally handed over to its future operator, the Jülich Department of Works this August.

This plant’s staff proves that a can-do attitude and high productivity can be compatible with a safer workplace. The proactive approaches they used at the 162-MW Hutsonville plant ranged from improving boiler efficiency to better managing risks to workers.

Many customer quotation requests provide only the line size, pressure class rating, and valve type. A typical request might read: size 4, Class 900 globe valve. Though this may be enough information to produce a valve quote, it rarely is enough information to size the best valve from both a performance and cost perspective.

Omaha Public Power District commissioned Unit 2 at its Nebraska City Station in May of this year. The new 682-MW unit joins Unit 1, which went commercial 30 years ago in the same month. The project is outfitted with all the requisite air quality control systems and sports a very good thermal efficiency. More importantly, the plant will provide reasonably priced power for customers of eight municipal utilities that share ownership of the plant’s electrical output. Those utilities paid for their portion of the construction cost and now receive a like portion of the electrical output from Unit 2 under a unique participation power agreement.

ESAB Welding & Cutting Products’ newly introduced CaddyTig 2200i AC/DC power source is designed to produce quality gas tungsten arc (TIG) and shielded metal arc (stick) welds in a variety of materials. With a light, compact design, the CaddyTig 2200i offers control panels that present all welding parameters in an easy-to-understand layout. ESAB’s two-program function […]

Hard work was required at the 2,600-MW Rockport Plant to make improvements to equipment, materials, and processes. But that hard work has paid off: The plant’s units operate much better, employee safety has improved, the facility is setting generation records with both of its 1,300-MW units, and it earned the PRB Coal Users’ Group Large Plant of the Year honors.

The design of Nash’s new ECO-FLO builds on the company’s previous liquid ring vacuum pump models. While it offers the same reliability, performance, and operating costs, the ECO-FLO reduces water usage by up to 50%. The inlet and discharge piping are unchanged, and the upgraded model uses an existing base, motor, and drive. ECO-FLO is […]

Complying with a corporate environmental policy requires much more than just writing a check for equipment upgrades. It takes a dedicated and knowledgeable staff that’s willing to invest years of work to permanently reduce a plant’s environmental footprint. The staff of Seminole Generating Station have completed multiple, incremental plant improvements over the past decade that have significantly reduced air emissions and minimized solid waste disposal.

E.H. Wach’s newly launched Small Diameter Split Frame (SDSF) is an externally mounted machine tool for cutting, beveling, and counterboring pipe from 0.84 inch to 4.5 inch diameter. Featuring a self-squaring clamping system for precise cutting results that are typically available only with fixed machine tools, the SDSF is also capable of performing socket weld […]

Independent designer, manufacturer, and service provider of energy control and optimization solutions Woodward Governor Co. recently started production of its CONCYCLE wind power converters in the U.S. The electric power convertor units are designed for use with wind turbines with a power range of 1 MW to 10 MW for onshore and offshore applications. Woodward […]

Limestone composition and reactivity are critical factors that determine the performance of limestone-based wet flue gas desulfurization systems. Limestone quality affects sulfur dioxide (SO₂) removal, reaction tank sizing, limestone consumption rate, and composition of the gypsum product and waste streams. Reactivity is a direct measure of how readily a limestone will provide alkalinity to neutralize the acid resulting from SO₂ dissolution in water. In this article we review your limestone analytic measurement options and discuss their relative accuracy and limitations.

ERICO has developed a range of CWP grounding clamps that are ideal for use in applications including lightning protection, fault current ground, signal reference grid, and static ground. The clamps help minimize the possibility of damage from a lightening strike or other transient voltage by reducing the electrical potential between metallic objects and building systems. […]