Harvard Business School Professor Clayton Christensen coined the term "disruptive technology" in his best-selling 1997 book, The Innovator’s Dilemma. According to Christensen, a disruptive technology unseats a dominant technology by creating products that are so much cheaper or better in one or more ways that they quickly become the new mainstream standard, transforming an entire […]

Renewables require rethinking just about everything/Torque-splitting drive train improves wind turbine reliability/Waste gas–burning engines reach milestone/Hybrid power plant targets pipeline losses/Power from paint/Gulf Coast Power Association conference report/Pat Wood talks about the challenges facing ERCOT

The U.S. electric utility industry has long encouraged its customers to get more value from their electricity dollar. Today, the industry—facing volatile costs and mounting concerns about the environment—is coming together to create a new role for energy efficiency—one that enables technology to deliver more value to customers and electric utilities alike. For example, "smart" […]

Fireproofing switchyards From an insurance carrier’s perspective, we fully condone the use of on-line condition monitoring for large, critical transformers ("Monitoring key gases in insulating oil keeps transformers healthy," POWER, October 2006). However, another issue that the transformer failure and subsequent fire at Arizona Public Service’s West Wing Substation in 2004 highlights is the need […]

Safeguarding coal-handling assets;
Giant wind turbine hard to bear

  What’s in a name? Plenty, if the word is "renewable." Intuitively, most people outside the energy industry consider hydroelectric power "renewable." The dictionary defines the word as follows: "capable of being replaced by natural ecological cycles." Accordingly, rainwater should indisputably qualify as renewable. Yet since the early days of renewable portfolio objectives, most hydro […]

The use of longer steam turbine last-stage blades (LSBs) reduces the number of low-pressure casings and, thus, a turbine’s total installed cost. In many cases longer blades extract more energy from low-pressure steam before it enters the condenser and improve a turbine’s overall thermodynamic efficiency. But creating longer blades requires forsaking conventional design techniques for complex aerodynamic analysis of stationary vanes and rotating blades. Has the market push for longer LSBs exceeded current technology limits? Does the industry conduct proper analysis to determine when using longer blades is beneficial or not?

Upgrading to digital–twice / Lower-cost turbine monitoring / Pros and cons of remote process control / Nuts about Superbolt

Most sponsors of bid solicitations seek to attract the maximum number of high-quality bids. Basic economic principles tell us that the greater the number of respondents to a solicitation, the greater the competition and the greater the benefits to the solicitor. Somewhat counterintuitively, and notwithstanding California’s need for more electricity supply, the state’s utilities are […]

The O&M staff of AES Westover Station wisely took a holistic approach to optimizing combustion within Unit 8’s boiler in order to reduce its NO_x emissions while maintaining acceptable levels of carbon-in-ash content. The results of major modifications—centered on the addition of a fan-boosted overfire air system—were a 60% reduction in NO_x levels, improved unit reliability, and a project payback period measured in months rather than years. As this project proved, the whole is more than the sum of its parts.