Web-Based Discussion of Low Swirl Combustion

Wednesday, November 8, 2006
10:am to Noon PST

EPRI Page on Low Swirl Combustion Webcast
Presentation with audio (wmv file, 11 Mb)
Presentation without audio (JPG file, 2 Mb)
Final report

e-mail invitation sent out on Oct. 25, 2006


Lawrence Berkeley National Laboratory (LBL)

in conjunction with the
Department of Energy (DOE) Office of Clean Power Systems


Electric Power Research Institute (EPRI)


invite your participation in a

Web-Based Discussion of Low Swirl Combustion *


Wednesday, November 8, 2006


10:00 AM to Noon, PST


* "This webcast and the audio will be recorded, and your participation provides consent to that recording."  Webcast seating is limited to 65 participants, available on a first-come, first-serve basis.  The webcast with audio will be posted after the meeting on the Live Meeting website.

Webcast Topic


This web-based discussion will feature a presentation by Dr. Robert Cheng, Lawrence Berkeley National Laboratory, that describes his work on the development of Low Swirl Combustion (LSC) technology.  The objective of this web-based discussion is to provide researchers, vendors, and users of gas turbine equipment with an opportunity to learn about these R&D efforts and discuss them in an open forum with other interested parties.


Background Information on LSC Technology

LSC is a dry-low NOx technology conceived at LBL.  It is currently being developed for application to 5-7 MW industrial gas turbines fueled with natural gas to achieve ultra-low emission targets of <5 ppm NOx and <10 ppm CO without the use of post-combustion control systems such as SCR.  A logical extension of the current program is the adaptation for hydrogen-rich gaseous fuels including coal-derived syngas and 90+% pure hydrogen and scale-up to the sizes of large utility gas turbines, ultimately meeting the long-range DOE goal of 2 ppm NOx emissions from hydrogen-fired turbines at 2500-2600F turbine firing temperatures.


The LSC principle is fundamentally different than the high-swirl DLN concept where toroidal vortices with strong recirculation and intense shear turbulence are generated to hold and continuously ignite the turbulent premixed flames.  LSC exploits the characteristic wave-like properties of premixed combustion and enables premixed turbulent flames to freely propagate in a divergent flow at swirl intensities well below the critical vortex breakdown threshold.  With LSC, turbines will have greater flexibility in their operations than is achievable by current technology.


Laboratory experiments are being conducted currently on hydrogen fuel-specific issues, and discussions are underway with gas turbine manufacturers to define the specifications and operating conditions of the hydrogen low-swirl injector.  Further background information on LSC is available at http://energy.lbl.gov/aet/combustion/LSC-Info/


Webcast Participation Information


Live Meeting First Time Users

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Audio Call in Number

Toll free: (888) 564-3287; Participant code: 8224


Live Meeting Webcast Site Address


Webcast Agenda




10:00 AM

Introduction of Dr. Robert Cheng

10:05 AM

Introduction to Low Swirl Combustion Technology, including a history of Low Swirl Combustion development and applications, the theoretical basis for recent successes with LSC combustion and review of LSC models.

10:25 AM

Q&A on LSC Technology.

10:35 AM

Presentation of Data summarizing lab experience, the Maxon burner industrial experience and if possible the Solar Turbine experience and discussion of
scale-up approaches.

10:55 AM

Q&A on Data

11:00 AM

Potential Applications of LSC in large scale turbines for natural gas, syngas, and hydrogen fuels.

11:15 AM

Q&A on Potential Applications

11:20 AM

Scale-up Issues and Future Challenges that may arise in successful scale-up to larger machines.

11:30 AM

Q&A related to Scale-up Issues and Future Challenges

11:35 AM

Needed R&D to overcome potential Issues and challenges

11:50 AM

Q&A on Needed R&D

11:55 AM






The Webcast presentation material and a list of Frequently Asked Questions and Answers on LSC will be posted at http://energy.lbl.gov/aet/combustion/LSC-Info/ on or before November 1, 2006.

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