Micro gas turbine engine for powering a generator
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United States of America Patent
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Feb 23, 2016
Grant Date -
Oct 30, 2014
app pub date -
Feb 26, 2014
filing date -
Feb 26, 2013
priority date (Note) -
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Abstract
A unique, small microturbine engine adapted to integrate with an electrical generator for producing electrical power has been developed. The microturbine includes an ejector cooling scheme, a prevaporizing combustor, and a combustor air bypass. The ejector cooling scheme uses energy in the hot exhaust gas stream of the microturbine to entrain a flow of ambient air that cools the generator. The prevaporizing combustor of the present invention allows liquid fuel to be vaporized in a small amount of air prior to combustion, thereby increasing combustion efficiency and decreasing combustor size requirements. The combustor air bypass allows a fraction of the compressor discharge air to bypass the prevaporizing combustor under certain operating conditions. This permits control of the overall equivalence ratio and the fuel/air mixing process in the combustion zone, improving efficiency and operability.
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