Detecting coolant leaks in turbine generators
First Claim
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1. An apparatus for detecting a leak in a generator cooled by a first gas, the apparatus comprising:
- a subsystem for introducing a non-corrosive second gas having an infrared absorption spectrum into the generator, the non-corrosive second gas comprising an inert gas, and the subsystem further enables replacing the first gas with the inert gas and thereafter introducing air at a predetermined temperature until the inert gas is reduced to between 99% to 1% by volume; and
an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive second gas, the imaging component having a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the non-corrosive second gas.
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Abstract
An apparatus for detecting a leak in a gas cooled generator is provided. The apparatus includes a subsystem for introducing a non-corrosive second gas having an infrared absorption spectrum into the generator. The apparatus also includes an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive second gas. The imaging component is provided with a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the non-corrosive second gas. The imaging component displays an image of the tracer gas leaking from the generator on the imaging component.
160 Citations
19 Claims
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1. An apparatus for detecting a leak in a generator cooled by a first gas, the apparatus comprising:
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a subsystem for introducing a non-corrosive second gas having an infrared absorption spectrum into the generator, the non-corrosive second gas comprising an inert gas, and the subsystem further enables replacing the first gas with the inert gas and thereafter introducing air at a predetermined temperature until the inert gas is reduced to between 99% to 1% by volume; and an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive second gas, the imaging component having a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the non-corrosive second gas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for detecting a gas leak in a hydrogen cooled generator, the system comprising:
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a source of non-corrosive tracer gas; a subsystem for introducing non-corrosive tracer gas into the hydrogen cooled generator, the non-corrosive second gas comprising an inert gas, and the subsystem further enables replacing the hydrogen with the inert gas and thereafter introducing air at a predetermined temperature until the inert gas is reduced to between 99% to 1% by volume; and an infrared imaging device adapted to display an image of the non-corrosive tracer gas. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for detecting a leak of a coolant in a generator, the method comprising:
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disposing an infrared imaging device having a cooled detector response of between 3 μ
m to 5 μ
m with a field of view encompassing at least a portion of the generator;introducing a tracer gas into the generator the tracer gas having an absorption spectrum of between 3 μ
m and 5 μ
m;filtering radiation received by the infrared imaging device in the absorption spectrum of the tracer gas; displaying an image of tracer gas leaking from the portion of the generator on the infrared imaging device, wherein the step of introducing the tracer gas comprises replacing the coolant with carbon dioxide, and thereafter introducing air at a predetermined temperature until the carbon dioxide is reduced to between 99% to 1% by volume. - View Dependent Claims (16, 17, 18, 19)
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Specification