CFD-based Analysis of Non-Premixed Combustion Model in Biomass Grate Furnaces

M. Hafiz, L. O. Nelwan, M. Yulianto

Research output: Contribution to journalConference articlepeer-review

Abstract

Biomass grate furnace is widely used as heat source for various uses including grain drying. In this study, a CFD simulation using Fluent 18.0 academic was performed on a biomass ladder grate furnace, which can be used later to improve the design as well as the operation technique of the furnace. A downscaled overfeed type furnace with size of 15 x 30 x 50 cm was built to validate the model. The turbulence model used in this study was k-epsilon while the combustion model of non-premixed combustion was used. The simulation was performed with the biomass feed rate of 4 kg/h and air flow velocity of 7.5 m/s at 3.81 cm inlet diameter. The simulation result at outlet temperature was 673 °C and inside temperature were 775 and 717 °C, while the composition of gases was 0.18 for CO, 0.2 for CO2, 0.001 for CH4, 0.09 for H2O, 0.51 for N2 and 0.029 for other gases. Test results from a biomass ladder grate furnace were used to validate the model and the results are 646 °C for the outlet temperature, 712 and 582 °C for inside temperature. Comparison between simulation and measurement results shows good value with average percentage of deviation 12.12%.

Original languageEnglish
Article number012029
JournalIOP Conference Series: Earth and Environmental Science
Volume147
Issue number1
DOIs
Publication statusPublished - 2018 May 14
Externally publishedYes
Event2nd International Conference on Agricultural Engineering for Sustainable Agricultural Production, AESAP 2017 - Bogor, Indonesia
Duration: 2017 Oct 232017 Oct 25

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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