Renewables

Replacing blades on a wind turbine is not a simple task. Blades range from 40 to 60 meters in length and can weigh 16 tons or more. Combined with hub heights that can exceed 100 meters and locations that are, by definition, subject to prevailing winds, replacing blades becomes challenging. Add in the cost of […]

Rooftops with arrays of tiny wind-powered microturbines and hydro microturbines generating power as water flows through municipal drinking water systems or the outflow of municipal sewage treatment systems?  They’re real. For many in the electric power business, the term “microturbine” conjures up images of small, gas-fired machines, a fad a decade ago that never caught […]

Utility-scale energy storage in the form of pumped water storage has a long history. One of the oldest U.S. plants found itself in need of an upgrade after 40 years of service. Having the right equipment for the job is proving to be essential. With the current power market challenges and increasing amounts of variable […]

Hydropower is booming, but unless you live in China, Latin America, or Africa, you may have missed it. Global installed capacity of hydroelectric generation has grown by more than 25% over the past decade

An old saying often attributed to Mark Twain is, “Figures don’t lie, but liars figure.” Listening to the conflicting information presented by a variety of senators during a hearing on Capitol Hill Sept. 29, one has to wonder if Twain was covering a Senate hearing when he penned the phrase. The only witness at the […]

In its latest effort to ram down carbon emissions and address air pollution, China will strictly limit public financing to coal and other high-carbon projects and begin a national program in 2017 to cap and trade greenhouse gas emissions.  The country’s emission trading system will cover power generation, steel, cement, and other key sectors. China […]

NRG Energy has embarked on a “reset” that will see a separation of its core distributed generation and fossil fuel businesses.  The company, headquartered in Princeton, N.J., wants to “simplify” NRG Group to cut down expenses and debt. In a transition that will begin now and be fully effective on Jan. 1, 2016, it will separate […]

Speaking at the Solar Power International (SPI) conference in Anaheim, Calif., on Sept. 16, U.S. Vice President Joe Biden hailed the nation’s progress in expanding its solar generation capacity and announced several new investments in solar power technology as part of the Department of Energy’s (DOE’s) Sunshot Initiative. In an enthusiastic and animated address to […]

Parts of Calpine Corp.’s The Geysers geothermal power complex have been severely damaged by a wildfire that has incinerated swathes of California.  One of the world’s largest geothermal facilities, the 725-MW Geysers complex sits on 45 square miles of land along the border of Sonoma and Lake Counties in Northern California. Calpine said at least […]

A new policy approved by India’s cabinet will simplify its foray into offshore wind power, says a key stakeholder.  The National Offshore Wind Energy Policy approved by the Prime Minister Narendra Modi’s Union Cabinet on Sept. 9 designates the Ministry of New & Renewable Energy (MNRE) as the nodal ministry for use of offshore areas […]