Measurement technology

The measurement of states such as temperature and pressure is an indispensible method in technology. It allows for connections in processes to be discovered and documented. Next to the standard measurement technologies for the measurement of pressure, temperature, mass flow etc., the Institute for Energy Systems has a wide range of knowledge, as well as hardware and software, pertaining to the field of contactless measurement technology.

Laser measurement technology
Laser spectroscopy has the advantage of making contactless measurements possible. This is especially important where there are high gradients or sensitive systems, which are not susceptible to conventional measurement technology (such as flame temperature determination). The applicability of laser measurement technology is only limited by optical permeability. Even here, however, information from the boundaries of the measurement volume can still be attained. There are a variety of spectroscopic measurement methods being used at the Institute for Energy Systems, amongst others:
LIF (Laser Induced Fluorescence) - In this method, the fluorescent property of gases is excited, and used to determine concentration and species. This method is specifically used for the investigation of the main species in flame investigations (such as online tar measurement).
LDA (Laser Doppler Anemometry) - With the help of laser doppler anemometry, the speed of a particle can be determined. In this method, a laser beam is split, and then brought back together. Through the overlaying in the intersection, an interference arises, which is dependent on the speed of the particle to be measured. This method is applied, among other places, in the experimental determination of heat transfer coefficients.
PIV (Particle Image Velocimetry) - The particle image velocimetry method serves the determination of particle speeds, as well as the determination of a 2 or 3 dimensional velocity field in the particle flow.
Raman Spectroscopy - This method makes the determination of species concentrations possible, such as the online determination of product gas composition, or the determination of heat and material transfer coefficients.
Rayleigh Spectroscopy - Rayleigh-scattering works very well for the determination of gas flows, such as in flames, which due to their high temperatures, cannot be measured using other methods without taking special precautions. Through this method, a one or multidimensional temperature field can be created.