Optimizing Excess Air

Many furnaces use more excess air (generally around 5 - 10%) than what is optimal, resulting in both higher energy consumption and increased NOx emissions. By monitoring the NOx, O2 and CO levels in exhaust streams and using these readings to control excess air amount to near stochiometric optimum can reduce energy consumption. Reduced excess air also helps reduce NOx emissions (a reduction from 15% to 5% is shown to reduce NOx emissions by 35%) (Worrell et al., 2008. p.59)

Development Status Products

Optimizing Excess AirCosts & Benefits

Parent Process: Melting and Refining
Energy Savings Potential

Generally savings of around 10% can be achieved, depending on the current practice . (Worrell et al., 2008. p.59)

CO2 Emission Reduction Potential

Quantitative information not available


Quantitative information not available

Optimizing Excess Air Publications

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