Browsing by Author "Jayakody, KKR"

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    item: Conference-Extended-Abstract
    Effect of parboiling method on the physical properties of parboiled paddy
    (2011) Ariyasena, DGCL; Jayakody, KKR; Gunasekera, MY
    Some important physical properties of paddy necessary for designing grain processing equipment namely, size and shape, thousand grain weight, bulk density, true density and angle of repose at moisture content of about 15% d.b. for raw paddy LD 365, a red rice variety were determined. These properties were also determined for the same variety of paddy after parboiling using cold soaking method at moisture content of about 29% d.b. and using hot soaking method at moisture content of 17% d.b. When comparing raw paddy, cold soaked paddy and hot soaked paddy, the thousand grain weight varied as 15.56g, I6.47g and 15.32g respectively. Bulk density was 585.92, 576.4 and 539.32 kg/rn respectively where, true density was 1183.61, 1177.32 and 1097.92 kg/m* respectively. Porosity varied as 50.50%, 51.04% and 50.88% and the variation of angle of repose WAS as 33.6
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    item: Thesis-Full-text
    Modeling of biomass gasification with CO₂ enrich air as gasifying agent
    Jayakody, KKR; Narayana, M
    The biomass gasification has been carried out using an updraft gasifier. This work focuses on the production of producer gas from biomass (Rubber Wood). Mathematical model for thermo-chemical process of biomass gasification is developed in this research work. ASPEN PLUS simulator and pilot plant gasifier were used to investigate the effect of reactor temperature, equivalence ratio and CO2 to air ratio on composition of producer gas. The gasifier was operated over a temperature range of 500-1000 C, while varying equivalence ratio from 0.2 to 0.36and CO2 to air percentage from 1% to 10% and it was found that the most of trends were similar for both the case. The results showed Carbon monoxide concentration in the product gas increases with increase in temperature and CO2 to biomass ratio but decreases with increasing equivalence ratio.