Hydro

In chemistry, osmosis refers to the movement of water molecules through a selective membrane from an area of low solute concentration to an area of high solute concentration, creating a pressure gradient. Researchers have recently demonstrated that exploiting this natural phenomenon could produce useful amounts of electrical power.

The length of term allowed for power sales contracts is a critical determinant of the ability of states to meet their increasingly ambitious renewable power targets. Many utilities advocate limiting terms to 10 or perhaps 15 years for renewable energy contracts, emphasizing the "flexibility" that shorter terms offer. In contrast, contract terms of 20 or […]

Commercial operation of PacifiCorp’s first new power plant in more than 20 years coincided with the company’s acquisition by MidAmerican Energy Holdings Company this past March. Currant Creek treads lightly on the environment, provides needed power to PacifiCorp’s eastern control area, and has demonstrated its commitment to be a good corporate citizen of the local community. By any account, Currant Creek is a model for how to develop a power project.

With the commercial debut of the first of six planned 470-MW turbines in December 2005, the time has come to pay homage to the sheer size (2,820 MW) and longevity (13 years and counting) of TEPCO’s Kannagawa Hydropower Plant. By the time Unit 2 is commissioned in 2010, and Units 3 through 6 go on-line "in and after 2016," two generations of engineers, technicians, and builders will have worked on the "pure" pumped-storage project since its inception. As if those stats weren’t impressive enough, Kannagawa marks the debut of "splitter runners" for pump-turbines. They increase the effective head of the plant to the highest in the world: 2,142 feet, at a flow of 135,000 gallons/second. That’s a very large pump-turbine, indeed.

New York City has an insatiable appetite for power, but supplying that power from plants inside the city’s five boroughs (where 80% of its peak demand must come from) is tough. So it’s nothing short of miraculous that a 500-MW combined-cycle plant in Astoria, Queens, began commercial operation at the end of 2005. What did it take to bring this plant on-line? The largest state-owned power organization in the U.S.—The New York Power Authority.

Focus on O&M

The 130-MW Yuncán  hydroelectric plant (Figure 4) has come online in Peru about 210 miles northeast of Lima. To show his support for the project, Peruvian President Alejandro Toledo Manrique attended the inauguration ceremony. Yuncán  was commissioned just 21 months after the Peruvian government awarded a 30-year contract to operate the plant to EnerSur, the […]

For thousands of U.S. businesses, a lesson learned the hard way over the past few years is the need for an absolutely reliable electricity source. Challenging the standard backup power options, proton exchange membrane fuel cells are making a play for this duty.

  Renewable power development will continue to grow in the U.S., with the nonhydro total reaching 53,121 MW by the end of 2016. So predicts a soon-to-be-released report from Boulder, Colo.–based Platts Analytics (which, like POWER, is a part of Platts, a division of The McGraw-Hill Companies). If all that capacity goes on-line, it would […]

  Promoting renewable exports The DOE is not the only U.S. government department promoting renewable energy. Any U.S. energy firm or supplier looking to export its goods and services can tap the services of the Energy Team at the Commerce Department’s International Trade Administration (ITA), which is part of the U.S Commercial Service (USCS). The […]