Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / A DissertaÃÃo deMestrado trata do desenvolvimento de uma caldeira de vapor nÃo-convencional, onde à empregada a âCombustÃo de FiltraÃÃoâ. O objetivo da pesquisa foi estudar a combustÃo do BiogÃs do lÃquido da casca do coco verde, com respeito à eficiÃncia e emissÃes.
A combustÃo à analisada com um modelo numÃrico, estruturado em FORTRAN e PREMIX, adaptado para processos de âCombustÃo em Meios Porososâ.
Os resultados de simulaÃÃo sÃo confrontados com dados experimentais, que ressaltam vantagens operacionais em relaÃÃo Ãs caldeiras convencionais, destacando-se elevada eficiÃncia de extraÃÃo de energia e baixos nÃveis de emissÃes de CO e NOx. / The current Dissertation treats the theoretical and
experimental studies about a non-
conventional saturated steam boiler, in which a com
bustion technology is employed, the
âFiltration Combustionâ, as basis for conception of
its burner construction design. This
combustion thermal system was studied by means of a
prototype, in laboratory scale,
specially developed for this research. It was prop
erly instrumented in order to make it
possible to monitor as well as the combustion proce
ss as the energy extraction in the
reaction zone. The objective of this investigation
is to verify the effects of the Biogas
obtained from the anaerobic digestion of the Green
Coconut Skin Liquid (GCSL), on the
boiler operation, concerning efficiency and polluta
nt emissions, as well as the reaction
stability. Biogas combustion is analyzed by numeri
cal model simulations, which take in
account the mass, energy (gas and solid phases) and
species conservation equations. The
model is structured with a flexible code in languag
e FORTRAN, which includes
equilibrium calculation performed through premixed
combustion simulation software, the
PREMIX, adapted to the combustion process and heat
transfer in porous medium. The
simulation allows the prediction of the temperature
distribution profiles along the burner
and the combustion products as function of two main
operation parameters, the
equivalence ratio and the air-fuel mixture flow vel
ocity. Simulation results are compared
with measurements in this analysis and some design
aspects of the "Porous Burner Boilerâ
are discussed, which evidences its operational adva
ntages in comparison to the
conventional boilers, especially the high energy ex
traction efficiency and low carbon and
nitrogen oxides emission levels
| Identifer | oai:union.ndltd.org:IBICT/oai:www.teses.ufc.br:2628 |
| Date | 27 March 2009 |
| Creators | LuÃs Carlos Eduardo Oliveira de Souza |
| Contributors | William MagalhÃes Barcellos, Clodoaldo de Oliveira Carvalho Filho, Edson Bazzo |
| Publisher | Universidade Federal do CearÃ, Programa de PÃs-GraduaÃÃo em Engenharia MecÃnica, UFC, BR |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFC, instname:Universidade Federal do Ceará, instacron:UFC |
| Rights | info:eu-repo/semantics/openAccess |
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