Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Monte Carlo simulation of surface radiative heat transfer in cavities of domestic gas ovens
Submission Author:
Jair Alexander Torres Delgado , SC
Co-Authors:
Amir Antonio Martins Oliveira
Presenter: Jair Alexander Torres Delgado
doi://10.26678/ABCM.ENCIT2016.CIT2016-0233
Abstract
The analysis of newer designs of more efficient and effective ovens requires the modeling and optimization of the radiative heat transfer among surfaces whose radiation exchange is blocked by the presence of cooking trays. The Monte Carlo simulation of the thermal radiation exchange provides an effective cost-benefit ratio for performing the optimization of oven cavities with multiple surfaces with different positions and radiative properties. Here, the Monte Carlo simulation is applied to the calculation of view factors and net radiation heat transfer rates in oven cavities. Initially, a ray tracing algorithm to obtain the view factors is tested and validated for different configurations. A convergence analysis of the accuracy and dispersion of the results is done by comparison with available solutions resulting in error smaller than 0.4 % and standard deviations relative to the mean less than 0.0050 with 10.000 rays emitted. Then, the ray tracing algorithm is implemented for multiple view factors of the blocked rectangular cavity adding a multi-zones approach to tracing rays in geometry with obstacles. The boundary conditions for radiative simulations are provided by measurements of temperature in a conventional oven cavity, considering the required care in the measurement of the temperatures. The simulation shows high accuracy as well reaching values smaller than 0.3 % for 1 run of 〖10〗^7 rays. Following, a study of the field of radiation on the interior of cavity is developed. The gas burner oven is compared with an electric heating oven, showing a higher radiation exchange with the radiation source surface but lower uniformity over the load surfaces than that reached with electrical heating elements.
Keywords
Monte Carlo, Surface radiative heat exchange, Domestic gas ovens, Food cooking, Monte Carlo, Surface radiative heat exchange, Domestic gas ovens, Food cooking, Monte Carlo, Surface radiative heat exchange, Domestic gas ovens, Food cooking
