초록 ▼

A cooled cooling air (CCA) system is provided for application with gas turbine cycles. In an embodiment of the invention, the CCA system includes a shell and tube heat exchanger in which water flow is provided inside the tube(s) and air flow is provided on the shell side. Water exiting the heat exch

A cooled cooling air (CCA) system is provided for application with gas turbine cycles. In an embodiment of the invention, the CCA system includes a shell and tube heat exchanger in which water flow is provided inside the tube(s) and air flow is provided on the shell side. Water exiting the heat exchanger is partially evaporated. Accordingly, the resulting two phase water/steam flow is admitted to a separator where the steam and water are separated. The saturated steam is flowed to the HRSG whereas the separator water is recycled to the heat exchanger.

대표청구항 ▼

1. A combined cycle power plant comprising:a combustion turbine system having a compressor for producing compressed air, a combustor for combusting a fuel in said compressed air to produce combustion air, and a gas turbine for expanding said combustion air to produce mechanical energy and exhaust ga

1. A combined cycle power plant comprising:a combustion turbine system having a compressor for producing compressed air, a combustor for combusting a fuel in said compressed air to produce combustion air, and a gas turbine for expanding said combustion air to produce mechanical energy and exhaust gas; a steam generator having an inlet for receiving said exhaust air and a plurality of sections located sequentially in a flow path of said exhaust gas for removing heat from said exhaust gas to produce at least one steam flow; a steam turbine system for receiving said at least one steam flow; and a cooling air flow path for directing a compressed air fraction from said compressor to at least one of said compressor and said gas turbine for cooling a portion thereof; wherein said cooling air flow path comprises a heat exchange system for receiving said compressed air fraction and for removing heat therefrom to produce a heated fluid flow and a cooled compressed air flow, wherein said heat exchange system comprises a chamber having a compressed air inlet and a compressed air outlet and at least one tube for flowing water for heat exchange with hot compressed air disposed in said chamber, and further comprising a flow separator for separating said heated fluid flow into water for recirculation to said tube in said chamber and a first steam flow, and at least one pump for pumping said water separated by said flow separator to said tube in said chamber.