| OCR Text |
Show 13 Conclusions Although only partial results of the program can be reported to date, the following conclusions can be drawn: 1. Boundary layer staging holds excellent low NOx performance potential for conventional gas burners. 2. NOx reductions of 44% have been achieved. 3. Field data and additional model studies indicate that NOx reductions on the order of 75 % are possible. 4. Properly designed boundary layer staged burners are highly stable and reliable. 5. Flame path lengths increase with boundary layer staging, but are easily controllable by increasing turbulence (swirl) of the burner. 6. Adjusting burner swirl number controls CO emissions to less than 100 ppm. 7. Boundary layer staging can be adapted to different types of conventional gas burners such as gas ring, spud, or poker-type burners. 8. Installed cost is less than S3/kW. The Newman Unit No.3 project, including all the preliminary research and modeling test work, cost S2.64/kW installed. |
