GE Promoting Combined Natural Gas Wind and Solar Power Plant

While the “Gas Age" won’t last forever, gas fired power looks like being used as a way of kick-starting the transition to 100% renewable energy, with hybrid plants like this one being proposed by GE enabling solar thermal, wind and gas fired power generation to share generation and transmission infrastructure. Technology Review says - “The hybrid plant could be the cheapest and easiest way to add renewable energy to the grid" - GE Combines Natural Gas, Wind, and Solar. Alstom are moving in a similar direction, but not as fast - Building bridges.

GE has announced the first power plant to integrate wind and solar power with natural gas—a 530-megawatt plant that will start operating in Turkey in 2015. The power plant is made practical by a flexible, high-efficiency natural-gas system the company announced two weeks ago and a solar thermal power system created by eSolar, a Burbank, California-based startup that GE recently invested in.

Such hybrid plants may become the dominant type of new power plant in some parts of the world, GE says. The new technology is aimed at countries that use 50 hertz electricity (the United States uses 60 hertz). In particular, it could make it easier for China and the European Union to meet their renewable energy targets.

Adding solar power to natural gas plants isnt a new idea, but it hasnt been economical without government subsidies. GE says that because of its new turbines and related equipment, these hybrid plants can, for utilities with the right combination of sunlight and natural gas prices, be competitive even without government support.

While combining solar thermal power and natural-gas turbines is not new, adding wind power to such a system is, GE says. Pairing wind with the natural gas plant helps shave some of the cost of the wind power—the wind farm can share some of the natural gas plants control systems and its connection to the grid. The natural gas plant also smooths out variations from the wind turbines.

Solar thermal power involves the use of an array of mirrors to concentrate sunlight and the resulting heat to produce steam. That steam can be fed into the steam turbine at a natural gas combined cycle plant to boost its power output.

The solar concentrator array from eSolar helps lower costs in two ways—its modular concentrator system is easy to install and easy to modify for the needs of specific plants. It also produces higher temperature steam than some previous solar thermal systems, increasing power output. GE has also developed a natural gas power plant that is highly efficient, and whose power output can easily be adjusted to make up for variations in power output from solar power.

Connecting a solar thermal system to a natural gas power plant, and thus eliminating the need to buy a separate steam turbine and related equipment, can cut the cost of a solar thermal system by up to 50 percent, says Jon Van Scoter, CEO and president of eSolar. Paul Browning, vice president of thermal products at GE, calls it "the most cost-effective form of solar energy available today."

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Could Natural Gas Fuel a Trucking Revolution

The Energy Collective has a post from Geoffrey Styles on the growth of natural gas fuelled road transport - Could Natural Gas Fuel a Trucking Revolution ?. might as well use that transition fuel up as fast as possible...

The International Energy Agency (IEA) released its latest Medium-Term Gas Market Report in St. Petersburg, Russia last month. Although the IEA sees the growth of gas in the power sector slowing, they also cite its emergence as "a significant transportation fuel." What really caught my eye was their projection that gas over the next five years would have "a bigger impact on oil demand than biofuels and electric cars combined," in light of the US shale gas revolution and tougher pollution rules in China.

Thats quite an assertion, considering oils longstanding dominance in transportation energy. As I noted in March, Italy, Pakistan and several other countries already have well-established demand for compressed natural gas (CNG) for passenger cars. Despite these hot spots only 3% of gas is currently used in transportation, globally, based on analysis from Citigroup. The IEA is forecasting that transportation growth will consume 10% of the projected global gas production increase of roughly 20 trillion cubic feet (TCF) per year by 2018. Thats 2 TCF per year of additional natural gas demand in the transport sector, equivalent to 1 million barrels per day of diesel fuel.

Id be more skeptical about that figure if I hadnt seen a presentation from Dr. Michael Gallagher of Westport Innovations at the Energy Information Administrations annual energy conference in Washington, DC last Monday. Westport specializes in natural gas engine technology for heavy-duty trucks and played a major role in implementing the LNG vision of the ports of Los Angeles and Long Beach, CA a few years ago.

Dr. Gallagher made a strong case for gas in heavy-duty trucking, starting with the low cost of US natural gas compared to oil and its products. Initial growth rates in several segments look encouraging, including transit buses and new trash trucks, for which natural gas now has around half the market. Growth in China has apparently been even faster, with LNG vehicles increasing at over 100% per year (from a small base) and natural gas refueling stations growing at 33% per year since 2003.

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Energy And Natural Resources

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