Energy Balance of Biscuit Oven
Under standing Energy balance of biscuit oven is important for energy saving s in baking oven
Input to the oven is the heat energy from combustion of fuel ( lpg , cng , ldo/hsd/ , electrical ) . One
must evaluate the fuel options available for the factors such as Availability of fuelCost per unit
Calorific Value of the fuelMaintenance cost on the BurnersHence the fuel with best value ( calorific
value per unit x net cost per unit ) should be sourced .
Now Oven out put in energy terms are Heat Loss during baking of biscuit Heat Loss during
evaporation of moisture - Flour quality plays important role plus the mixing qualityHeat Loss through
flue gas - Combustion generates flue gases which escapes through stacks . Heat recovery system
can be installed recover this heat .Air to fuel ratio has to be checked so as to prevent excessive
heating going out as flue gas .
Heat Loss through radiation - Biscuit Ovens have either duct s or Pipe s through which hat air
circulates . Considerable heat are lost in these mediums . Good Insulation can be provided to
minimize the loss of heat through Biscuit Oven bodyHeat Loss in Band Heating - Band re heating s
are now days incorporated by manufactures by providing enclosure at the bottom through which
the bands returns to the feeding end .For majority of the Baking Ovens it has been seen that it
utilise' s only 40 - 50% of the Heat Input . Efforts has to be made for optimisation of heat energy
Energy Balance Diagram
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