Apparatus and methods for controlling the supply of water mist to a gas-turbine compressor
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United States of America Patent
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Nov 12, 2002
Grant Date -
N/A
app pub date -
Nov 6, 2000
filing date -
Nov 6, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A water droplet mist is sprayed into the air upstream of the gas-turbine compressor inlet to increase power output from the gas turbine. The water has the effect of lowering dry-bulb temperature of the air entering the compressor inlet. To supply an amount of water appropriate for anticipated ambient conditions, a plurality of different capacity pumps are provided to supply water over a wide range of water flow rates. The control system for the pumps avoids the use of a set-point temperature for the inlet air obtained from measurements taken downstream of water injection. The operator inputs a desired relative humidity of air entering the compressor, and the control system determines the appropriate flow rate of water using the following measurements: flow rate of dry air to the compressor; flow rate of inlet water; dew point temperature of the inlet air; dry-bulb temperature of the inlet air; and temperature of the inlet water.
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