Gas

California’s drive to add flexibility to its grid in response to expanding renewable generation took another step forward in September as NRG Energy commissioned two new fast-start units at its El Segundo Energy Center near Los Angeles. The two units, with a combined 550 MW capacity, represent the second Siemens Flex-Plant to go into commercial […]

As variable generation from wind and solar power increases and peak loads grow and become more volatile, the U.S. electric grid will rely more and more on gas-fired power to maintain system flexibility. Often at the core of these gas-fired power plants are aeroderivative turbines, whose fast-start and cycling capabilities allow for frequent on-again, off-again […]

Many utilities have taken advantage of relatively low-cost natural gas to address environmental pressures and upgrade their power generation portfolio in one of three distinct ways—replace, repower, or

Gas Power Reciprocating gas engines find work in multiple power generation applications, from providing fast-start backup generating capacity for intermittent renewable resources to offering scalable and

A new 2-MW power-to-gas (P2G) plant inaugurated by Germany’s E.ON in late August will convert excess wind energy into synthetic natural gas that can then be fed into the regional gas grid, where it can be

Table 1. Change in furnace and air heater temperature as a function of the ratio of coal and gas fuel use in a typical steam plant. If natural gas supply prices fall below the delivered cost of coal, a unit

Pressures on competitive power markets have fueled substantial declines in plant valuations over the past five years, with coal plants taking the brunt of the damage. That’s the conclusion of a new report from financial services firm Fitch Ratings released on Wednesday. The report, which calculated the net present value of plants across the country […]

The Energy Information Administration (EIA) reported Wednesday that although natural gas use for power generation through the first seven months of 2013 is down 14% from historic highs last year, it remains above the 2009–2011 average across the U.S. The drop is the result of higher gas prices relative to coal compared to 2012. However, […]

Much attention has been devoted recently to the increased cycling that is necessary in fossil plants as more renewable capacity is added to the grid, but data on the precise impacts has been slight. Now, a new study from the National Renewable Energy Laboratory (NREL) aims to correct that. The key findings: While cycling would increase […]

The Environmental Protection Agency (EPA) on Friday issued a revised proposal to curb carbon emissions from new power plants that sets separate standards for new gas-fired and coal-fired power plants. The agency also revealed it is developing new carbon standards for existing power plants. Separate Standards for Coal and Gas and Forthcoming Existing Plant Standards […]

Natural gas demand in the U.S. is poised to grow strongly over the next two decades, and there’s no mystery where all that gas will be going. Analysts at the recent LDC Mid-Continent Gas Forum in Chicago agreed that the biggest growth potential—as much as 15 Bcf/d—is in gas-fired power. “It’s clear the majority of […]

Ending a tumultuous battle over the future of electricity in the state, the California Legislature passed a wide-ranging revision of its ratemaking structure last week. Despite the contentious subject, the bill, AB 327, was approved by a broad bipartisan majority and garnered widespread support from the state’s three investor-owned utilities, the residential solar industry, and […]

The Department of Energy on Wednesday conditionally authorized Dominion Cove Point LNG, LP to export domestically produced liquefied natural gas (LNG) to countries that do not have a Free Trade Agreement (FTA), marking the fourth order allowing non-FTA LNG exports. The orders authorizes Dominion Cove Point LNG to export 0.77 billion cubic feet of natural […]

U.S. states vary widely on how they are regulating the booming business of producing natural gas from shale formations, according to a study released this summer by the Washington environmental think tank Resources for the Future (RFF). “As the shale gas boom has taken off,” says RFF, “states have updated their regulations, each with varying […]

The revolution that has toppled coal from the top of the generating queue in the U.S. has not reached the rest of the world, according to the “BP Statistical Review of World Energy.” While natural gas may have supplanted coal as king of the hill in the U.S. electric generating mix, the solid mineral—geographically the […]

Much recent debate about shale gas recovery through horizontal drilling and hydraulic fracturing has focused on methane emissions from shale gas wells. The general take on this topic is that methane (the remarkably simple molecule CH4) is a greenhouse gas “20 times” or “25 times,” or some other number, more “potent” than carbon dioxide, the […]

Linde Group, an international industrial gases firm based in Munich with a U.S. home in New Jersey, is an unusual beneficiary of the U.S. shale gas revolution. The company has developed technology using the industrial gases it can produce in copious quantities, to reduce some of the environmental objections to developing shale gas wells. Linde […]

Looking Out for Shale Gas Labor Issues The Houston Chronicle reports that the U.S. Department of Labor is closely watching how shale gas producers protect their laborers from workplace accidents and injuries. They suspect violations of the Fair Labor Standards Act on hours of work and overtime pay. The gas industry’s critiques say the companies […]

In a welcome development almost no one saw coming, America’s greenhouse gas emissions have fallen to 1992 levels and are expected to continue to decline, according to the U.S. Energy Information Agency (EIA). In addition to a sluggish economy and more fuel efficient cars, “fracking” has been a big driver of this trend. “Fracking” is shorthand for […]

The Marcellus shale formation—the second-largest natural-gas field in the world—has been a blessing for Pennsylvania’s workers and our economy. Almost a quarter-million people in Pennsylvania work to produce natural gas from the Marcellus shale or in related industries. Thanks to the growth of hydraulic fracturing, commonly known as fracking, the Marcellus has been responsible for […]

Director and provocateur Josh Fox is confident, “There is no safe drilling” and has made two of what the New York Times called “muckraking documentaries” crusading against the practice of hydraulic fracturing or “fracking.” His movies are powerful propaganda rife with misleading or inaccurate claims and leave little to no room for the other side. […]

Most Americans have never heard of Texas oilman George Mitchell, who died in July at the age of 94 at his home in Galveston, Texas. But Mitchell, the son of a Greek immigrant goat herder, was arguably the most important individual in America’s energy history since Thomas Edison and John D. Rockefeller. Mitchell truly was […]

The shale gas revolution has so far been a U.S. phenomenon. But hydrocarbon-containing Devonian shale formations are far from a U.S. or even North American phenomenon. Geologic forces didn’t follow political boundaries in the Devonian period 400 million to 300 million years ago. Indeed, the continents then were not where they are today by large […]

If you’ve been paying attention to energy issues in the media lately, you may have encountered a curious narrative that’s starting to gain traction among supporters of renewable energy. Namely, that the core problem with wind and solar photovoltaic (PV) generation, which is matching moment-to-moment demand with the intermittency wind and sunlight, isn’t really a […]

  If you’ve seen U.S. coal industry executives casting wistful glances across the Atlantic recently, there’s a reason. In the U.S., natural gas is enjoying a boom unseen in decades, perhaps ever. New production from shale should make the country a net exporter within a decade. New gas-fired plants are starting up almost as fast […]

  As environmental regulations continue their forward march and gas prices remain low compared to historic rates due to increased domestic supply, the number of power plants changing their primary fuel source to natural gas has increased dramatically. In 2011 and 2012, just more than 5.5 GW of power plant capacity switched to burning primarily […]

Despite frail demand for natural gas in Europe and difficulties in upstream production growth in the Middle East and Africa, the “Golden Age” of natural gas will remain in full swing until at least 2018, recent projections from the International Energy Agency (IEA) show. A medium-term outlook released by the Paris-based autonomous intergovernmental organization in […]

A common talking point among critics of hydraulic fracturing is that they somehow “own the science” on shale development. The industry is merely raising doubt about scientific studies, they claim—just enough to confuse the public and make them think there’s a legitimate debate. As the Washington Post recently characterized Gasland Part II director Josh Fox’s opinion: Fox frets […]

  Lubricating oil is the lifeblood of virtually all rotating equipment found in a power plant. Keep it clean and the lube system is relatively low maintenance. However, cycling operation and restarts after a temporary or long-term shutdown can reveal a whole new class of perhaps unfamiliar problems. The fundamental question is determining when a […]

One lesson learned from the U.S. military’s far-flung operations during the 2010s was the critical importance of fuel supply lines. At the peak of the conflict in Afghanistan, getting each gallon of gasoline or diesel into remote operating bases could cost upwards of $1,000 when all transportation and security costs were factored in. With U.S. […]