Field measurements

Large-scale combustion systems with a thermal power rating above 200 kW are measured by ourselves directly at customer sites. In the case of large-scale furnaces, this may either take place when problems occur at the development stage, in each manufacturer's development laboratory, or where there are specific problems in the field. Needless to say, on site inspections also take place with large-scale combustion systems, e.g. such as those employed in the chemical industry.

Individual measures

Owing to the fact that, in most instances, the technical configuration of large-scale combustion systems is highly individual, i.e. is tailored to the specific requirements and wishes of end customers, for any targeted measurement operation of combustion oscillations, it is frequently necessary to have correspondingly individual measuring probes and adapters. These are developed by ourselves in-house, and in some cases also manufactured by ourselves. As well as these special production items, our company now also has a large number of standard sensors, e.g. cooled microphone adapters or OH fibre-optic probes which are used for field measurements.

Our measuring techniques in the field:

Exhaust-gas analyser for verification of operating points
Various cooled and uncooled piezoelectric pressure transducers and microphones for measuring sound pressure oscillations in the combustion system
OH- and C2 probes developed in-house for measuring heat-release in the combustion zone of the system being measured
Hot-wire anemometer for measuring flow velocities and distributions
Accelerometers to measure mechanical vibrations

The Argus OMDS system developed internally by us is used for detection and analysis of the sensor signals, using instrument technology. This has proved to be particularly effective when combustion oscillations only occur sporadically, i.e. during specific ambient conditions, thereby preventing a specific investigation from being carried out. In such instances the Argus OMDS system, being an autonomous system, offers the particular advantage of allowing the problem to be examined continuously, for example over a period of several months, by only making data recordings when combustion oscillations occur.