J. Phys. IV France 09 (1999) Pr3-501-Pr3-506
Measurement of steam quality for the control of steam-generating collectorsS. Zunft1 and N. Bissinger2
1 German Aerospace Center (DLR), Institute of Technical Thermodynamics, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
2 German Aerospace Center (DLR), Electronics Laboratory, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
A safe operation of steam generating parabolic trough collectors under transient weather conditions requires a control of the specific enthalpy of a two-phase flow. Such a control depends on a measurement of the steam quality. This contribution presents the design of a capacitance voidmeter for this purpose. It allows the measurement of the steam fraction of a two-phase flow in horizontal pipes that is independent from the flow pattern. Experiments performed over the relevant range of parameters show a reliable operation and accurate results.
© EDP Sciences 1999