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

Carlos A. Acosta; Amar Bhalla; Ruyan Guo

doi:10.1117/12.2532655

10 September 2019 In-situ characterization of multi-phase flows in a dynamic scraped surface heat exchanger using optical techniques in the visible spectrum

Carlos A. Acosta, Amar Bhalla, Ruyan Guo

Author Affiliations +

Proceedings Volume 11123, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XIII; 111230Y (2019) https://doi.org/10.1117/12.2532655
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

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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Carlos A. Acosta, Amar Bhalla, and Ruyan Guo "In-situ characterization of multi-phase flows in a dynamic scraped surface heat exchanger using optical techniques in the visible spectrum", Proc. SPIE 11123, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XIII, 111230Y (10 September 2019); https://doi.org/10.1117/12.2532655

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