System and method for temperature control of exhaust gas recirculation of gas turbine system

The EGB system addresses the inefficiencies of EGR systems by bypassing the cooler to mix hot and cold exhaust gases, enhancing performance and reducing complexity by preventing condensation and icing, thus improving part load efficiency and emissions control.

WO2026135694A1PCT designated stage Publication Date: 2026-06-25GE VERNOVA INFRASTRUCTURE TECHNOLOGY LLC +1

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
GE VERNOVA INFRASTRUCTURE TECHNOLOGY LLC
Filing Date
2024-12-20
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing gas turbine systems face reduced part load efficiency due to the operation of exhaust gas recirculation (EGR) systems, which cool exhaust gases, leading to potential water condensation and icing issues, and the need for additional inlet bleed heat systems for anti-icing, thereby affecting performance and complexity.

Method used

Implementing an exhaust gas bleed (EGB) system that bypasses the EGR cooler to mix hot exhaust gases with cooled exhaust gases, controlled by a damper or valve, to maintain or increase intake temperatures and reduce condensation, while maintaining emissions control, thus eliminating the need for inlet bleed heat systems.

Benefits of technology

Enhances gas turbine performance by preventing condensation and icing, improving part load efficiency, and simplifying the system by eliminating the need for additional anti-icing systems, while maintaining emissions reduction capabilities.

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Abstract

A system includes a gas turbine system having a compressor, a combustor, and a turbine, where the gas turbine system is configured to discharge an exhaust gas. The system further includes an exhaust gas recirculation (EGR) system configured to recirculate a first portion of exhaust gas to an intake section of the gas turbine system via an EGR return. The system also includes an exhaust gas bleed (EGB) system configured to mix a second portion of exhaust gas with the first portion of exhaust gas in the EGR return downstream of an EGR cooler.
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