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Technical Committee Fuel Oils

Using radial momentum for flame stabilisation

A large amount of heating in households is produced by the combustion of domestic heating oil. The emissions from this combustion can be reduced by using new burner technologies. It is the aim of this project to reduce harmful emissions by investigating the combustion process.
It was intended to develop a burner with a very simple design for oil for a power range between P = 15 kW and 25 kW. Stabilisation of the flame is supposed to be achieved using the principle of radial momentum combined with a commercially available pressureatomiser fuel injection system (nozzle).
Both stable operating and low emissions were observed in combustion tests by stabilising the flame with radial momentum. The burner was built according to a very simple design. Whilst carrying out tests on the burner in a combustion chamber for a power output of P = 18 kW, emissions of Enox = 80 mg/kWh (E 0 < 20 mg/kWh) were measured. Without the partial flow of combustion air to cool and clean the nozzle the measured emissions were lower than Enox = 65 mg/kWh.
In a combustion chamber with cooled walls, the burner operated in a power range of P = 15 kW to 22 kW, without a resulting increase in the CO emissions. This power range could be enlarged using a combustion chamber with uncooled walls operating in the range from P = 8,2 kW to 22 kW.

O. Hatzfeld et al.
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