Heat transfer analysis of laboratory scale fast pyrolysis fluidised bed reactor

Seyed, Amirmostafa Jourabchi (2017) Heat transfer analysis of laboratory scale fast pyrolysis fluidised bed reactor. AIP Conference Proceedings. ISSN 1551-7616

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Official URL: http://dx.doi.org/10.1063/1.4979372


Heat transfer analysis of a fluidised bed with a bore diameter of 2.5 cm and a vertical length of 50 cm was investigated by using computational fluid dynamics (CFD) on FLUENT 15.0 educational version software. The Eulerian-Eulerian two-fluid granular model was used as the multiphase flow model to perform this simulation. A 2-D axisymmetric model was considered by using glass and stainless steel beads of 0.5 mm and 1.0 mm in diameters as the heat transfer medium to biomass. The Gidaspow model was used for the drag equation and the Gunn model was used in the interphase heat transfer coefficient determination. Heat transfer coefficient (HTC) of stainless steel beads shows to be approximately 3 times higher than that of the glass beads of the same size based on having higher thermal conductivity. At wall temperature of 500 K, stainless steel and glass beads can be fluidised by using nitrogen linear velocity of 0.7 and 0.3 m/s respectively. Under these optimum conditions, HTC reaches up to 7625 W/(m2.K) and 2900 W/(m2.K) for stainless steel and glass beads and their surface temperatures can reach up to 495 K and 480 K, respectively.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering & Quantity Surveying
Depositing User: Unnamed user with email masilah.mansor@newinti.edu.my
Date Deposited: 20 Jun 2017 03:17
Last Modified: 20 Jun 2017 03:17
URI: http://eprints.intimal.edu.my/id/eprint/826

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