Modelling flow and mass transfer of thermal separation equipment constitutes one of the most challenging tasks in fluids process engineering. The difficulty of this task comes from the multiscale multiphase flow phenomena in rather complex geometries. Both analysis of flow and mass transfer on different scales as well as validation of models and simulation results require advanced experimental and measurement techniques. As a follow-up to intensive discussions during the 2019 Tutzing Symposium ''Separation Units 4.0'' a wide set of available modern experimental technologies is presented.
An optimized equipment design for natural gas processing and liquefaction plants becomes increasingly difficult with changing process conditions: Particularly low values of surface tension create rising challenges on the design of phase separators and column internals. The TERESA test rig at HZDR was designed to allow the investigation of multiphase thermohydraulics and phase separator performance under critical fluid properties in industrial dimensions. A versatile pipe test section is available in DN200 and equipment internals may be tested in a sectional DN300/DN500 test separator. The applied test fluid shows a high vapor-liquid density difference between 1470 and 940 kg m -3 , viscosity as low as 0.12 mm 2 s -1 , and surface tension down to 1.3 mN m -1 . Volumetric liquid and vapor flow rates may be varied up to 9 and 530 m 3 h -1 in the test rig, respectively.
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Supporting Information available onlineThe design of industrial feed line sections and the selection of appropriate inlet devices requires knowledge about the two-phase flow morphology and phase fractions in order to reduce costly overdesign. Since experimental data for two-phase pipe flows at industrial scale are hardly available, current prediction methods are subject to high unertainities. In this study, horizontal two-phase flow morphologies for different industrial feed line sections were studied using wire-mesh sensors at multiple locations along the pipe. The obtained phase fraction data are compared with correlations.
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