Heat recovery steam generators (HRSGs) are often used downstream of gas turbines to efficiently utilize exhaust gas heat.  The gas travels through steam tube banks to generate steam for a turbine or process equipment.  Flow and heat transfer characteristics within the HRSG are critical to its performance.  ASC utilizes our flow modeling expertise to optimize the heat transfer to the tube banks, the velocity and temperature profiles through the NOx catalyst, the duct burner position and design, as well as the overall pressure loss.

HRSG Sample Velocity Profile	Sample Temperature Profile	OTSG Sample Velocity Profile

    Utilizing our 3D Probe data acquisition system ASC can test the flow field downstream of the turbine or  upstream of first row of tubes to ensure any flow control devices are working as intended.  The three figures show different models' predicted velocity and/or temperature distributions with duct burners in operation. 

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Animated HRSG Temperature Streamlines

Airflow Sciences Corporation used a Computational Fluid Dynamics (CFD) model to simulate the flow field and temperatures within an Heat Recovery Steam Generator (HRSG). The MPEG clip below illustrates the streamline paths through the HRSG. The streamlines are color coded to reflect the gas temperature as they move through the HRSG.

Click here to download and view the full animated streamline MPEG (801 KB).