ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 03 NO. 01 JANUARY 2015:

Title:           Fluent modelling on rice husk combustion in a chamber of Hoffman brick kiln
Authors:     Le Thi Kim Phung, Le Anh Kien
Abstract:   Rice husk is becoming a popular fuel use for Hoffman brick kiln in Vietnam. The combustion of rice husk in a Hoffman kiln chamber was not well-known in literature review. This paper showed the study of combustion taken place in Hoffman kiln chamber in both empirical and modelling method. The experimental results showed that the CO concentration was from 14mg/m3 to over 3100mg/m3, the temperature in the chamber was varying from 795oC to 1050oC during the kilning time. Oxygen content was from 5% to 20%. In the modelling method, the computation was conducted using Fluent version 14.0. In calculation, the unsteady model, 2D space planar, pressure based type, and absolute velocity were used. The species transport and volume reaction were defined to model the gas phase. The multiphase model was employed to solve the problem using two phase modelling. The k- sub-model combined with near-wall treatment for the standard wall functions were employed for turbulence. The computational results fitted to the experimental results. Temperature in calculation was from 400oC to 900oC. The highest CO content in Fluent modelling was about 2200mg/m3. This paper contributed the suitable mathematical model for the combustion of rice husk in the Hoffman brick kiln.

Keywords:   Combustion, Rice husk, CFDs, Fluent, Hoffman kiln
Pages:          78-82

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