Hydro

Driven by policies to limit carbon emissions, as well as government subsidies, the share of worldwide nonhydro renewable power is set to grow from just 3% in 2009 to 15% in 2035, the International Energy Agency (IEA) forecasts in its recently released World Energy Outlook 2011. Under the same scenario—which assumes that carbon pricing, explicit […]

China’s efforts to build the Myitsone Dam—a $3.6 billion hydropower project planned at the confluence of the Mali and N’Mai Rivers at the source of the Irrawaddy River in Burma’s Kachin State—were thwarted in late September after Burma’s President Thein Sein suspended construction “to respect the will of the people.”

In December 2009, construction of an underwater tower and fish collection structure was successfully completed at the 465-MW Pelton Round Butte Hydroelectric Project. The first-of-its-kind fish bypass and intake structure returns temperatures in the lower Deschutes River to historic patterns and restores downstream passage of Chinook, steelhead, and sockeye salmon while maintaining existing generating capacity.

South Africa is at a critical turning point. An uncertain environment for private investment, escalating electricity prices, and a lack of available power threaten South Africa’s position as an attractive investment destination for many of the country’s most important industries. Power has been placed at the forefront of the government’s agenda, but South Africa needs a collaborative effort to meet the country’s energy demands and diversify its generation portfolio in order to drive economic growth.

In the past few years, nuclear concerns, rising oil prices, and a growing understanding of our environmental impact has given energy issues a higher profile worldwide. In this report on the Continental Nordic countries, we look at the efforts being made in much of the Nordic region to secure a sustainable energy supply for the future and at the extent to which the innovative solutions of these countries can be exported around the globe.

A new analysis of 85 hydroelectric reservoirs distributed around the world suggests that these systems emit about 48 million metric tons of carbon annually. That figure is much lower than earlier estimates of 64 million metric tons that were based on studies relying on more limited data and which cautioned that reservoirs of all types […]

As last winter’s abundant snowfall in the Pacific Northwest melted, rivers swelled and hydroelectric operators enjoyed substantial increases in generation. That bountiful clean and cheap power generation was a blessing, but it also triggered a host of legal issues.

I examined the magnitude of electricity subsidies for renewables compared with conventional generation technologies in my May 2011 editorial, based on data from a 2008 report prepared by the U.S. Energy Information Administration (EIA). An updated EIA report released in July determined that federal government subsidies have risen substantially during the past three years. In fact, overall renewable energy subsidies have almost tripled, increasing from $5.1 billion to $14.7 billion. In my opinion, we aren’t getting value for the money spent.

One of the world’s first breakwater wave power stations was commissioned this July by Ente Vasco de Energia (EVE), an energy agency in the northern Basque region of Spain. The €2.3 million ($3.3 million) project in Mutriku uses oscillating water column technology developed by Voith Hydro’s Wavegen, based in Inverness, Scotland. The technology is integrated into a concrete power station built on a breakwater or coastal protection project.

The major economic hurdle for renewable power generation technologies continues to be substantial installation costs. But another cost is associated with continuous load-balancing, made possible by backstopping that variable generation with dispatchable generators that typically consume expensive fossil fuels. Bottom line: Who pays for the capacity firming or backstopping resources?