Gas turbo-group with cooling air system
AssigneeAlstom (Switzerland) Ltd
InventorsJuergen Hoffmann, Stefan Rofka, René Waelchli, Rolf Dittmann
Life of this patent
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Abstract
A gas turbo set (1, 2, 3) is equipped with at least a cooling air system (20,21). Throttle points (22, 23) are arranged as throttling points in the cooling air flowpath, for the purpose of defining the cooling air mass flow. Said manifolds are bypassed by bypass lines (24). Means (25) are arranged in said bypass lines for adjusting the bypass mass flow. Thus, the cooling air mass flow can be varied without acting on the main cooling air flow as such.
Claims20
A gas turbo-group with a cooling air system, through which, during operation, at least one cooling air mass flow flows from a compressor to thermally highly loaded components of the gas turbo-group, whereby in at least one cooling air channel of the cooling air system a throttle point for adjusting the cooling air mass flow is provided, wherein a second flow channel, acting as a bypass channel, is provided, which branches off the at least one cooling air channel upstream from a throttle point and joins into the at least one cooling air channel downstream from the throttle point, and which second flow channel is provided with means for varying the bypass mass flow, and the flow cross-section of the second flow channel is smaller than the flow cross-section of the at least one cooling air channel.
A gas turbo-group with a cooling air system, through which, during operation, at least one cooling air mass flow flows from a compressor to thermally highly loaded components of the gas turbo-group, whereby in at least one cooling air channel of the cooling air system a throttle point for adjusting the cooling air mass flow is provided, wherein a second flow channel, acting as a bypass channel, is provided, which branches off the at least one cooling air channel upstream from a throttle point and joins into the at least one cooling air channel downstream from the throttle point, and which second flow channel is provided with means for varying the bypass mass flow and wherein an ejector is provided in the second flow channel.
Dependencies are inferred from the claim text.