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Modelling and simulation of a downdraft rice husk gasifier
Author(s) -
Chowdhury R.,
Bhattacharya P.,
Chakravarty M.
Publication year - 1994
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440180603
Subject(s) - wood gas generator , husk , range (aeronautics) , heat of combustion , thermodynamics , mechanics , kinetic energy , gas composition , environmental science , materials science , chemistry , waste management , physics , engineering , combustion , composite material , classical mechanics , botany , coal , biology
The behaviour of a downdraft rice husk gasifier of diameter 200 mm and a height 940 mm has been studied. The gasification rate was varied in the range 1.8–4.3 × 10 −2 kg/m 2 s. The air velocity was varied in the range 0.032–0.099 m/s. The producer gas obtained from the gasifier has a calorific value in the range 3240–4382 kJ/m 3 . A set of theoretical kinetic equations on the assumption of nonequilibrium conditions has been developed and solved numerically. The simulated temperature profile and outlet gas composition have been compared with those obtained from experimental runs. The model developed from a mechanistic approach is found to explain the behaviour of the present system appreciably within the range of variables studied.