WiSys: T170023US01

  • Patent applied for.

Industrial Furnace With Flameless Combustion and Impingement Flow for Increased Efficiency, Reduced Emissions and Intensified Heat Transfer


Pawel Olszewski

WiSys is currently seeking a strategic partner interested in further developing and scaling this innovative furnace system, ultimately providing a route to market for its commercialization.
OVERVIEWIn traditional industrial furnaces and ovens, combustion is used to generate heat, which is indirectly transferred to the material being processed. This pathway requires convection heating of the oven walls and subsequent radiative heating of the product. Inefficiencies, and corresponding monetary costs, occur at each step in the heat transfer. To improve combustion efficiency, air preheating is commonly used. However, this increases emissions of polluting nitrogen oxides (NOx). In addition, the average life of industrial furnaces is significantly high at 10 to 15 years, which can delay replacement to obtain improvements created by advancements in technology.
THE INVENTIONAn assistant professor of mechanical engineering technology and inventor from the University of Wisconsin Oshkosh has developed an industrial natural gas furnace and oven design that combines flameless combustion with high velocity impingement gas and air jets directed toward the product being heated. This novel combination has the potential to provide advantages over conventional technology that include higher energy efficiency, uniform temperature distribution, reduced NOx emissions, and intensified convection heat transfer. The design also has the potential to increase productivity by allowing more material to be processed within the same combustion area. This innovative system can be used for production of new furnaces as well as retrofitting existing installations.
  • A flameless impingement industrial oven that provides improved energy efficiency, reduced emissions and intensified heat transfer;
  • Compatible with both, continuous and batch processes;
  • Applicable to both furnaces and ovens;
  • Potential end user industries: metallurgy melting, reheating furnaces, glass power generation, crude oil processing, coal pyrolysis, food production & processing, chemical processing, electricals & electronics, automotic & aerospace, pharmaceuticals .
  • Increased productivity;
  • Reduced fuel consumption per unit of production;
  • Increased energy efficiency;
  • Reduced emissions (oxides of nitrogen, NOx);
  • Uniform temperature distribution;
  • Intensified heat transfer;
  • Can be retrofitted to existing furnaces.
STAGE OF DEVELOPMENTA small-scale prototype has been constructed and is currently being tested. Further refinement may be needed prior to manufacturing.
Contact Information
For current licensing status, please contact Jennifer Cook at or (608) 316-4131.
The WiSys Advantage

WiSys Technology Foundation serves the University of Wisconsin System comprehensive campuses by patenting and licensing discoveries to leading companies in Wisconsin, the United States and worldwide. Established in 2000 by the Wisconsin Alumni Research Foundation (WARF) and the UW System, WiSys is building the next generation of patent and licensing opportunities by fostering collaborations among campuses, private research organizations and industry, facilitating high-tech research with grant programs, and promoting student training for employment in a knowledge-based economy. WiSys's income is distributed to the UW campuses, the inventors and their departments to grow future discoveries and educational opportunities.