Efficiency Indicated by Reduced Flue Gas Exhaust

It is difficult to determine the exact amount of fuel combusted in biomass boiler due to variable bulk density and moisture content of biomass, making direct fuel flow measurement unreliable. Therefore, combustion quality and fuel consumption are commonly assessed using indirect indicators such as flue gas exhaust ventilator operation and flue gas temperature after boiler.

The chart shows a situation where Dween smart control was switched off and the boiler was further operated under local PLC control. Heat production remained at a similar level, while the flue gas exhaust ventilator frequency increased immediately.

With Dween control enabled, the same boiler output was achieved with lower flue gas exhaust ventilator operation, indicating combustion conditions closer to the optimal operating point and lower fuel consumption.

Operation under Dween control assures more efficient operation than standard PLC automation.