Dr. Carlos A. Acosta Berlinghieri Profile

Dr. Carlos A. Acosta Berlinghieri

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Proceedings Article | 10 September 2019 Paper

In-situ characterization of multi-phase flows in a dynamic scraped surface heat exchanger using optical techniques in the visible spectrum

Carlos Acosta, Amar Bhalla, Ruyan Guo

Proceedings Volume 11123, 111230Y (2019) https://doi.org/10.1117/12.2532655

KEYWORDS: Visible radiation, Spectroscopy, Optical properties, Industrial chemicals, Environmental monitoring, Crystals, Liquid crystals, Crystallography, Liquids, Absorbance

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Dynamic Scraped Surface Heat Exchangers (DSSHE) are widely used in chemical, pharmaceutical and food industries to homogenize solutions containing multiple substances in a pressurized and temperature monitored environment. This research is focused on the utilization of spectroscopy measurements in the visible spectrum to study the material phase transition characteristics in turbulent flows produced in a DSSHE to obtain information about the rate of crystallization, the freezing process, and the material phase transition, which are characteristics of rotating turbulent flows. Optical absorbance of chemical solutions containing high fructose corn syrup (HFCS) and CO2 are measured in the visible range to characterize the material phase transition process at controlled pressure and temperature conditions. The results show substantial sensitivities to the physical and chemical difference of the components as well as their solubility as function of temperature and pressure. The ability to measure physical and optical properties of mixtures using spectroscopy is valuable because of the complex nature of heat exchanging in a scraped surface heat exchange and the ability to capture material phase transition details in turbulent flows. The objective of this work is to further explore optical techniques for quality control and regulation of chemical processes.

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