Reduced Order Modelling and Visualization for the optimization of high temperature Concentrated Solar Power tower receivers
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In this work, we present a Reduced Order Method (ROM) approach to the heat exchange and loses problem in a simulated 3D cavity of CSP (Concentrated Solar Power) tower receivers and a tool to visualize ROMs solutions in order to check the results obtained for design purposes. We validate the method (intrusive ROM) in a 2D Boussinesq model problem for natural convection flow where we monitor temperature, pressure and velocity for different values of the Rayleigh number. We have already tested for 2D thermal flow in a square cavity with differentially heated vertical walls, with Rayleigh number Ra in the strongly convection-dominated regime (up to 10^7) as physical parameter. For the 3D problem of heat loses estimation, we compute the snapshots with Ansys Fluent in a realistic model of a cavity with wind velocity and wall temperatures as varying parameters, and compute solutions with a nonintrusive ROM of Convective Heat Losses to ambient (with or without cavity). ROMs have been obtained for two parameters variation, namely: wind velocity V = [5-30] m/s and cavity temperature T = [973-1373] K. The non-intrusive approach takes advantage of the ROMs library EZyRB [1] which has been connected with a Paraview-based application for fast and reliable results interpretation. REFERENCES [1] Demo et al., (2018). EZyRB: Easy Reduced Basis method. Journal of Open Source Software, 3(24), 661, https://doi.org/10.21105/joss.00661
