Combustion
in sentence
103 examples of Combustion in a sentence
The only byproducts of gas
combustion
are carbon dioxide, water, and small amounts of nitrogen oxides.
Furthermore,
combustion
engines account for more than one-fifth of the world’s carbon emissions, contributing significantly to climate change.
Until now, the wealth of nations has been based upon the
combustion
of coal, gas, and oil.
And that does not take into account the massive costs of climate change, to which the
combustion
of highly polluting fossil fuels is the leading contributor.
For the first time since the mid-nineteenth century, when the modern internal
combustion
engine was invented, its demise is within sight.
So long as methane leakage is contained, CO2 emissions from natural-gas
combustion
can be significantly lower than those caused by reliance on oil.
By contrast, it would take many years to match the expertise that Western car companies have developed over a century of producing internal
combustion
engines.
Making matters worse, cities tend to have higher rates of air pollution, especially fine particulate matter (PM) resulting from the
combustion
of fossil fuels and biomass, which contributes to up to three million deaths every year.
But biomedical research has yet to achieve the kind of productivity increases that accompanied the industrialization of combustion, electricity, and electronics.
During fossil-fuel combustion, carbon dioxide, the world’s most prevalent greenhouse gas, is emitted into the air, along with particles of incompletely combusted solids and gases (mainly sulfur dioxide and nitrogen oxides) that react chemically in the atmosphere to form fine particulate matter.
A fundamental break with this millennia-long pattern came only with widespread adoption of the first practical mechanical prime mover able to convert the heat of fuel
combustion
– James Watt’s improved steam engine, designed in the 1780’s.
The next two key milestones came during the 1880’s, with the invention by Benz, Daimler, and Maybach of the gasoline-fuelled Otto-cycle internal
combustion
engine and the patenting of Charles Parsons’ steam turbine.
The 1890’s witnessed the arrival of Rudolf Diesel’s inherently more efficient version of the liquid-fueled internal
combustion
engine.
Today’s most ubiquitous mechanical prime mover – installed in nearly a billion road and off-road vehicles, water vessels, airplanes, and countless machines and tools – is the gasoline-fueled internal
combustion
engine, fundamentally unchanged since the 1880’s.
There has been little real innovation ever since these prime movers were first commercialized more than a century ago (water turbines, steam turbines, internal
combustion
engines) or more than 50 years ago (gas turbines).
Recent developments show that even automotive internal
combustion
engines will not yield to electric motors or fuel cells as rapidly as many enthusiasts have hoped.
The United States is undergoing a third industrial revolution, an information-age upheaval that could be as momentous as its predecessors, which transformed society through the introduction of steam, iron, cotton, and machinery, and then internal combustion, electricity, and steel.
In the earliest days of the automobile in the late nineteenth century, many kinds of cars competed with each other – steam, battery, and internal
combustion
engine (ICE).
The gasoline and diesel-powered internal
combustion
engines won the competition with the success of the Model T, which first rolled off of the assembly line in 1908.
In fact, the use of biomass wreaks ecological and social havoc in developing economies, while de facto extending the lifetime of an obsolete
combustion
technology.
In the “Summary for Policymakers" of its 2014 Fifth Assessment Report, the Intergovernmental Panel on Climate Change stated that, globally, economic and population growth continue to be “the most important drivers" of increases in CO2 emissions from fossil-fuel
combustion.
Research indicates that black carbon (the soot from inefficient
combustion
in stoves, fires, engines, etc.) belongs to a class of substances that have an extremely high global warming potential.
Black-carbon reduction thus offers developing countries an opportunity to mitigate climate change at a fraction of the cost of full CO2 reduction, while providing cleaner air for their people, simply by avoiding soot formation in engines, stoves, and other
combustion
devices.
The
combustion
of diesel and coal are among the main causes of air pollution, with 3.7 million deaths attributed to outdoor fumes and 4.3 million resulting from poorly ventilated homes.
In 1992, global
combustion
of coal, oil, and gas, plus cement production, released 22.6 billion tons of CO2 into the air.
Coal can also be converted into hydrogen if we choose to go down the road of a hydrogen-based economy, in which hydrogen-powered fuel cells replace the internal
combustion
engine in automobiles.
Another low-hanging fruit is great gains in the fuel efficiency of internal
combustion
engines, taking automobile mileage from, say, 35 miles per gallon in the US to 55 miles per gallon by 2025.
The pathways all rely on three pillars: major advances in energy efficiency, using smart materials and smart (information-based) systems; zero-carbon electricity, drawing upon each country’s best options, such as wind, solar, geothermal, hydro, nuclear, and carbon capture and storage; and fuel-switching from internal
combustion
engines to electric vehicles and other shifts to electrification or advanced biofuels.
Companies cannot keep producing oil, gas, and internal
combustion
engines while gradually shifting to cleaner technologies; they need to make a clean break.
This model balances end-use energy consumption against available fuel supply, shedding light on energy use across industries as well as on CO2 emissions from fossil-fuel
combustion.
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