Pilot-Scale Investigation of Heat Flux, Radiation and CO Distribution from an OxyCoal Flame(PPT)

摘要

1. An oxy-coal combustion data set was produced to be used for V&V/UQ 2. Air Leakage was higher than desired and occurs primarily in the recycle fan 3. Heat removal through the coils is sensitive to burner changes and consistent with expected flame behavior 4. Heat removal through the coils decreases continuously due to ash deposition on heat transfer surface 5. Radiometer data increases continuously due to ash buildup and change in surface emissivity 6. CFD Modeling is Underway 6.1 Trends in heat flux and temperature are well represented 6.2 Magnitude is not exact 6.3 Most likely due to assignment of surface boundary conditions (emissivity, conductivity, etc.) 7. Current efforts include: 7.1 Measurement of the physical properties of the ash containing surfaces 8. For the next round of testing the following modifications will be made: 8.1 Upgrade of recycle fan to reduce air inleakage 8.2 Addition of soot blowing for cooling tubes and plates