Assertion: fuel cell | /r/HasProperty | efficient
Facets:
value: highly
type: DEGREE
value: to combustion engines
type: OTHER
value: highly energy
type: DEGREE
value: theoretically
type: DEGREE
value: at converting chemical energy
type: OTHER
value: at any size
type: OTHER
Source sentences:
text: These fuel cells are highly efficient and have a relatively low cost (theoretical efficiency can even approach 85%).
text: Professor Jeremy P. Meyers, in the Electrochemical Society journal Interface in 2008, wrote, "While fuel cells are efficient relative to combustion engines, they are not as efficient as batteries, due primarily to the inefficiency of the oxygen reduction reaction (and ... the oxygen evolution reaction, should the hydrogen be formed by electrolysis of water)....
text: Apparently, New York police stations normally have backup generators in case of power cuts but the Central Park station never lost power, so effective was the fuel cell.
text: Fuel cells are also very efficient at converting chemical energy into electrical energy.
text: In contrast, fuel cells can have near-zero emissions, are quiet and efficient, and can work in any environment where the temperature is lower than the cell's operating temperature.
text: These are highly efficient because in this process we don’t need to produce heat or mechanical work as intermediate steps to generate electrical energy.
text: Because fuel cells are clean and efficient at any size, they can be located almost anywhere, including dense urban areas where both air quality and transmission congestion may be of concern.
text: While NASA could afford to pay virtually any price for them, for consumer vehicles, "you need fuel cells that are not only efficient, but cost-effective," Drzal told Live Science.
text: This allows fuel cells to be highly energy efficient, especially if the heat produced by the reaction is also harnessed for space heating, hot water or to drive refrigeration cycles.
text: Fuel cells are highly efficient, typically reaching fuel to electricity efficiency of 60 percent, nearly double the efficiency of today’s electric grid.
text: It is this extremely high chemical temperature that allows the fuel cell to be theoretically so efficient.
text: In 2008, professor Jeremy P. Meyers, in the Electrochemical Society journal Interface wrote, "While fuel cells are efficient relative to combustion engines, they are not as efficient as batteries, due primarily to the inefficiency of the oxygen reduction reaction. ...