Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
EFFECTS OF INLET VELOCITY AND THERMAL CONDUCTIVITY RATIO ON PERFORMANCE OF A SOLAR VOLUMETRIC RECEIVER
Submission Author:
Roberta Reis Ribeiro , SP
Co-Authors:
Roberta Reis Ribeiro, Caroline Fernandes Farias, Marcelo De Lemos, Gustavo Ronceros Rivas
Presenter: Roberta Reis Ribeiro
doi://10.26678/ABCM.CONEM2018.CON18-0574
Abstract
This work presents numerical results for the thermal performance of a Solar Volumetric Receiver (SVR). The Thermal Non-Equilibrium Model and Rosseland approximation were used. Radiation boundary condition was implemented at the absorber inlet. The numerical technique employed for discretizing the governing equations was the control volume method with a boundary-fitted non-orthogonal coordinate system. The SIMPLE algorithm was used to handle the pressure-velocity coupling. Effects of inlet velocity ( ) and thermal conductivity ratio ( ) in the solid and fluid temperature distributions of the absorber were investigated. Reduction of temperatures as porosity increase or thermal conductivity decrease was observed, in addition to an increase in entry length for lower porosities or higher thermal conductivity ratio. Increase in inlet solid temperature as permeability increases was accompanied by a longer entry length and reduced final equilibrium temperature.
Keywords
thermal non-equilibrium, solar receiver, Porous media, Solar Energy
