Our CFD services are provided in partner with ANSYS Startup Program

ANSYS Startups

Benefits of CFD Modeling

  • Reduces costs—CFD modeling allows designers to predict results before installation, avoiding costly errors
  • Saves time—CFD modeling eliminates time consuming on-site trial and error situations and unnecessary costs
  • Provides detailed insights—CFD modeling gives insight into furnace operation that cannot be obtained through testing/measurement
  • Identifies furnace operational problems and solutions
  • Enables pre-installation testing of fuels, equipment, and accessories

Our Experience

CFD modeling is used to: 1) validate the baseline furnace combustion performance and 2) facilitate design of the air pollution control system for a particular unit.

We have developed our own modelling team and capability. The types of models include: 1) non-reacting flow; 2) fuel combustion and reacting flow; and 3) pollutant formation (i.e., NOx, SOx, LOI, CO, etc), with fuel ranging from coal, biomass, oil to natural gas. We have also analyzed a wide range of boiler types from pulverized fuel (p.f.) boilers (tangential or wall-fired) with a wide range of burners to fluidized bed and stoker units. Our models have addressed a variety of chemical-reacting flows associated with fuel combustion and reacting flow:

  • Solid fuel combustion chemistry (devolatilization, char oxidation kinetics)
  • Gas volatiles (i.e. gaseous fuel) combustion
  • CO finite rate chemistry
  • Soot formation chemistry (heavy oil combustion)
  • NOx formation chemistry (thermal NOx, fuel-N conversion chemistry)
  • SOx formation chemistry (SO2 and SO3) and reduction by limestone (CaO+SO2)
  • Urea and ammonia chemistry to reduce NOx
  • Sorbent chemistry for SO2, Mercury, and HCl capture.

RAS’s PhD level experts have modeled over 90 models on a wide variety of boiler configurations:

  • Circulating fluidized bed (CFB)
  • Tangential-fired
  • Wall-fired
  • Cyclone
  • Stoker/grate fired
  • Kilns
  • Various burner types

and fuel types:

  • Variety of coals
  • Biomass
  • Biomass co-fired with coal
  • Waste products
  • Oil
  • Natural Gas
  • Waste and landfill gases