JP Journal of Heat and Mass Transfer
Volume 13, Issue 4, Pages 465 - 484
(November 2016) http://dx.doi.org/10.17654/HM013040465 |
|
COMBUSTION PERFORMANCE FOR COFIRING ASSESSMENT OF RESIDUAL BIOMASSES: EUCALYPTUS (SAWDUST), BOCAIÚVA (SHELL) AND CRAMBE (BAGASSE)
Robson Leal da Silva, Carolina Santana Michels, Isabele Oliveira de Paula, José Ricardo Patelli Júnior and Paulo Smith Schneider
|
Abstract: In this paper, experimental investigation was conducted on the combustion performance for three different residual biomasses. These species are typically found in Brazil’s Central-West region, the Cerrado biome, namely Bocaiúva (from extractive harvesting), Crambe (from agricultural cropping industrial processing) and Eucalyptus (from planted forest for pulp and paper industry). The methodology applied considered determination of characteristics and behavior based on a combustion index (ICOM) considering mass consumption, burning temperature reached in the test and time elapsed up to total fuel consumption (or flame off). Experimental tests were performed in a small combustor, designed and built at UFGD facilities, in order to assess inherent characteristics of woody (Eucalyptus sawdust) and on-woody (Bocaiúva shell and Crambe bagasse) solid biofuels. Cofiring assessment is achieved by identifying best and worst characteristics during combustion, in order to propose amalgamating of two or more different residual biomasses to result in a good quality solid fuel blend. The main results obtained are highlighted as: (i) for single firing characteristics, Eucalyptus (sawdust) has the higher ICOM, followed by Bocaiúva (shell) and Crambe (bagasse); (ii) interesting cofiring combinations would be a solid fuel composed by 50%-50% of first and second, 25%-75% of the first and third one as well as a composition of 30%-35%-35%, respectively, for the first, second and third one’s species; (iii) absolute and normalized, time and temperature, indicate that Eucalyptus (sawdust) is prominent in both parameters, reaching higher temperatures in and able to self-sustain until fully burned; and (iv) low quantities of non-burned biomass and ash content, another indication of good combustion characteristics, were found for Eucalyptus (sawdust), followed by Bocaiuva (shell) and Crambe (bagasse). |
Keywords and phrases: combustion index, solid biofuel, renewable energy, heat transfer. |
|
Number of Downloads: 303 | Number of Views: 1862 |
|