Abstract

In this present work, the Computational analysis of fluid flow and heat transfer within a Scraped Surface Heat Exchanger SSHE , which is an industrial device, is reported. The 3D model of SSHE geometry is achieved with Solid Edge V18. 3D mesh model of SSHE with finite volume discretization obtained in ANSYS ICM CFD code and ANSYS CFX V15 used to solve continuity, momentum and energy equations using multiple rotating reference frame formulation. The steady, laminar, non isothermal flow of pure glycerin Newtonian fluid was investigated. The cooling process without phase change within the SSHE was studied. The different scraper blades of 3 and 2.The inlet velocity of the fluid is varied to evaluate the thermal behavior of SSHE. The different process parameters in the parametric study are rotational velocity, axial velocity and the different scraper blades 3 and 2 . When reducing the number of rotating parts, better cooling is achieved. The variations of the local heat transfer coefficient based on inner wall temperature and bulk fluid temperature as a function of the main process parameters, namely rotational velocity, axial velocity and the different scraper blades obtained. The results have shown that viscous dissipation has a significant effect on the cooling of the glycerine. The local heat transfer coefficient increases gradually when reducing the rotating parts of scraper blades improves the heat transfer rate. Larger increases of the same occurred with higher rotational velocity and axial velocity. If higher the value of rotating velocity=9rps is considered there is a viscous heating occurs and also more number of rotating parts friction is produced on the boundary layer surface and the temperature increases, so 2 scraper blades results shows the better heat transfer performance in bulk fluid temperature and local heat transfer co efficient. This is expected to be useful in the design of SSHEs handling highly viscous fluids. Rajesh S C | Gautham Krishnan | Sreehari P | Akhil Naryanan K | Sibin S Nair "Computational Analysis of Thermal Behavior within a Scraped Surface Heat Exchanger (SSHE)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd25241.pdfPaper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/25241/computational-analysis-of-thermal-behavior-within-a-scraped-surface-heat-exchanger-sshe/rajesh-s-c

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