Analysis of an infrared burner working with hybrid fuel: LPG / bio-oil

Abstract

From  the  pyrolysis  of  biomass  is  possible  to obtain bio-oil   with   higher   energy   density   and   better   use properties.  The  use  of  infrared  burners  has  many  advantages, for example, uniformity in the heat in the form of radiation and convection.  This  paper  presents  a  commercial  infrared  burner adapted with an ejector proposed to burn a hybrid configuration of  liquefied  petroleum  gas  (LPG)  and  bio-oil  diluted.  The dilution  of  bio-oil  with  absolute  ethanol  aimed  to  decrease  the viscosity   of   the   fluid,   and improving   the   stability   and atomization.  It  was  introduced  a  temperature  controller  with thermocouple  modulating  two  stages  and  solenoid  valves  for fuels supply. The infrared burner has been tested and evaluated its  performance  by  conducting  energy  balance.  The  method  of thermodynamic  analysis  to  estimate  the  load  was  used  an aluminum  plate  and  the  distribution  of  temperatures  measured by   thermocouples.   The   dilution   reduced   the   viscosity   and increased  the  lower  heating  value  (LHV),  providing  a  stable combustion    to    the    burner    through    the    atomizing    with compressed  air  and  burns  combined  with  LPG.  Injecting  the hybrid fuel there was increase in the heat transfer from the plate to the environment and gain useful benefit, due to the improved in the efficiency of the infrared burner.