The repair shop put an engine on a test bed, attached sensors, hooked it to computers, and tried every possible combination of gas and air.
"a vast number of on-road 18-wheeler tractor-trailer trucks hauling coal" in the Appalachian region of Kentucky and West Virginia could be converted to combination diesel-natural gas engines with the GFS system.
Muller , also said that "a vast number of on-road 18-wheeler tractor-trailer trucks hauling coal" in the Appalachian region of Kentucky and West Virginia could be converted to combination diesel-natural gas engines with the GFS system.
In this context, Senator Rockefeller asked the U.S. General Accountability Office to assess the state of the coal industry given the negative externalities that it now faces: a tougher EPA in combination with cheap natural gas prices and declining coal reserves that are harder to dig out in the Appalachian region.
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Onshore natural gas transmission compression means any combination of compressors and associated equipment involved in moving natural gas from production fields or natural gas processing plants through transmission pipelines to natural gas distribution pipelines and storage facilities.
Buyers will pay for gas with a combination of their money and their valuable time.
In Hassi R'mel, Algeria, 260 miles south of Algiers, construction has begun on a new power plant using a combination of solar and natural gas.
Or some combination of electric, natural gas and wishful thinking.
It should stimulate a boom in construction of gas-fired plants, given the huge new supplies of shale gas unlocked by the combination of deep horizontal drilling and hydraulic fracturing, or fracking.
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These automobiles can burn either gas or ethanol or some combination of the two.
That is, the figures reported here apply to the combination of specifications that will generate the best gas mileage.
The combination of higher volumes of domestic oil and gas being pumped and the loosest monetary policy in history should make mid-stream master limited partnerships one of the safest bets for 2013.
What Russians don't seem to be shelling out for is shelter and power--the combination of housing, water, electricity, gas and other fuels merits just 9% of Russians' overall consumption--thanks in part to lingering Soviet-era subsidies.
In 2008, the economy weakened and power generation from natural gas and renewables began to increase, a combination that led to a sharp reduction in emissions.
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Mining experts said it could have been a methane gas explosion, a coal dust explosion, or a combination of both.
In Texas, the combination of hot summers and water shortages are pitting farmers against shale-gas developers.
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But the combination of a Japanese tsunami, the Arab Spring, which drove up gas prices, and most prominently Europe I think has gotten businesses and consumers very nervous.
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This is driven by a combination of factors: low power prices due to the development of unconventional gas, the lack of incentives for low-carbon power and rising costs of nuclear power.
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Ousmane Sembene names his movie for a single mother of two educated children, who manages a Dakar, Senegal, gas station with unbeatable aplomb, wielding a bicycle horn like a combination intercom and sceptre.
It said markets had been hit by a combination of factors including the 2011 Japanese tsunami and the USA's interest in shale gas, which is extracted from shale rock using the controversial process of fracking.
It's a combination as tightly coupled as Fred Astaire and Ginger Rogers: wherever economic growth leads, greenhouse gas emissions must follow.
The combination of shale reserves and fracking technology has created vast new reserves that are fundamentally different than gas and oil pockets in the past, he said.
This gas contains approximately 80% of the original energy content of the coal, and is a combination of hydrogen, carbon monoxide, carbon dioxide, and methane.
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