ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-472-4
ISBN Online: 978-1-56700-471-7
3rd Thermal and Fluids Engineering Conference (TFEC)
METHODOLOGY TO IMPROVE FLOW DISTRIBUTION AND DUCT BURNER COMBUSTION IN HEAT RECOVERY STEAM GENERATORS
要約
Heat recovery steam generators are essential elements that take the waste heat from the gas turbine exhaust gas
to produce steam that upon expansion in a steam turbine delivers additional power. Supplementary firing duct
burner is used in these elements to increase the heat of the fluid likewise the steam production. Exhaust gas flow
plays a fundamental role to start ignition and keep rich burning using its residual oxygen to feed and form flames
by diffusion. Non-homogeneous distribution promotes duct burner flames to quench lowering the heat transfer.
In recent research several designs have been analyzed using computational fluid dynamics to improve flow
conditions by adjusting geometries or adding flow correction devices. A previous study that integrates a diverter
valve in the transition gas turbine-heat recovery steam generator for a combined cycle cogeneration plant yields
unstable flow results. This paper proposes a methodology to improve non-uniform flow pattern thus, efficient
combustion in duct burners by adjusting the attack angle of the duct burner baffles and other flow correction
components installed in the system. The analysis has its core on the structured experimentation carried out by
means of computational fluid dynamics being able to predict flow behavior with statistical bases.