“SE SEUS PROJETOS FOREM PARA UM ANO,SEMEIE O GRÂO.SE FOREM PARA DEZ ANOS,PLANTE UMA ÁRVORE.SE FOREM PARA CEM ANOS,EDUQUE O POVO.”

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OBRIGADO DEUS PELA VIDA,PROTEGENOS E GUARDANOS DE TODO MAL


AUTOR DO BLOG ENG. ARMANDO CAVERO MIRANDA SAO PAULO BRASIL

terça-feira, 1 de janeiro de 2013

MOURA, Johnson Pontes. – Construction and termic evaluation of a solar cooker of the type box. Program of Master Degree of Chemical Engineering – UFRN – Natal/RN – Brazil.

MOURA,  Johnson  Pontes.  – Construction  and  termic  evaluation  of  a  solar  cooker  of  the
type box. Program of Master Degree of Chemical Engineering – UFRN – Natal/RN – Brazil.

ABSTRACT
The present work presents a contribution in the study of modelings of transference of heat for
foods  submitted  to  the  experimental  tests  in  the  considered  solar  oven,  where  the  best
modeling  for  the  beefburger  of  chicken  in  study  was  evaluated,  comparing  the  results,
considering  this  food  as  a  half-infinite  (1er  object  considered  model)  and,  after  that,
considered  the  chicken  beefburger  as  a  plain  plate  in  transient  regimen  in  two  distinct
conditions: not considering and another model considering the contribution of the generation
term, through the Criterion of Pomerantsev.
The Sun, beyond life source, is the origin of all the energy forms that the man comes using
during its history and can be the reply for the question of the energy supplying in the future, a
time that learns to use to advantage in rational way the light that this star constantly special
tax on our planet. Shining more than the 5 billion years, it is calculated that the Sun still in
them will privilege for others 6 billion years, or either, it is only in the half of its existence and
will launch on the Earth, only in this year, 4000 times more energy that we will consume.
Front to this reality, would be irrational not to search, by all means technical possible, to use
to advantage this clean, ecological and gratuitous power plant. In this dissertation evaluate the
performance of solar cooker of the type box.
Laboratory of Solar Energy of the Federal University of the Great River of North - UFRN was
constructed  by  the  group  (LES)  a model  of  solar  stove  of  the  type  box  and was  tested  its
viability technique, considering modeling foods submitted when baking in the solar oven, the
cooker has main characteristic the easiness of manufacture and assembly, the low cost (was
used material accessible  composition  to  the  low  income  communities) and  simplicity  in  the
mechanism of movement of the archetype for incidence of the direct solar light.
They  had  been  proposals  modeling  for  calculations  of  food  the  minimum  baking  time,
considering the following models of transference of heat in the transient state: object the halfinfinite,
 plain plate and the model of the sphere to study the necessary temperature for the it
bakes of bread (considering spherical geometry). After evaluate the models of transmission of
heat will  be  foods  submitted  you  the  processes  of  to  it  bakes  of,  the  times  gotten  for  the
modeling  with  the  experimental  times  of  it  bakes  in  the  solar  oven  had  been  compared
 demonstrating the modeling that more good that it portraies the accuracies of the results of the
model.
ENLACE TESIS
 http://www.mediafire.com/view/?0770cmbxbakuxuy




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