process flow opt sheet
TRANSCRIPT
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Food Science & Technology - FST 650
Objectives - Process Flow Sheet and Process Optimization Module
Know what a process flow chart is
Understand the need to optimize processconditions
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Food Science & Technology - FST 650
KEY DEFINITIONS
A Flow Chart is a schematic depiction of theprocess required to make a given product.It contains all the information needed forprocess scale-up, design and cost
determination.
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Food Science & Technology - FST 650
ELEMENTS NEEDED TO DEFINE A
PROCESS Unit Operations (What Equipment? What
Sequence?)
– Design Criteria
–Geometry
Operating Conditions
– Fundamental and Calculated
– Critical Control Points
Materials of Construction
Mass Balance
Energy Balance
Physical and Chemical Characteristics
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Food Science & Technology - FST 650
What are Some Unit Operations?
Hint:
When the process starts, they end in“ing.”
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Food Science & Technology - FST 650
Objectives of a Food Process
Stabilize Product
– Physical
– Chemical
–
Biological
Impart Desired Physical and/or ChemicalCharacteristics
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Food Science & Technology - FST 650
TECHNIQUES FOR STABILIZING FOOD
Thermal Processing
Refrigeration
Freezing
Fermentation
Control of Water
Acidification
Chemicals Irradiation
Pressure
Modified Atmosphere
Pulsed Energy
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Food Science & Technology - FST 650
What Kind of Process?
Batch
Continuous
Semi-continuous
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Food Science & Technology - FST 650
PROCESS PARAMETERS
Fundamental
– Temperature
– Pressure
– Concentration
– Flow Rates
– Velocity
–Time
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Food Science & Technology - FST 650
PROCESS PARAMETERS (Continued )
Calculated or Measured
– Tip Speed\Power
– Torque
–Power / unit volume
– Shear Rate
– Total Strain
–Circulation Rate
– Superficial Velocity
– Dimensionless Numbers
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Food Science & Technology - FST 650
MASS and ENERGY BALANCE
EQUATION
IN = OUT + ACCUMULATION
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Food Science & Technology - FST 650
MASS BALANCE EXAMPLE
FINISHERS EVAP. MIXER
Negligible Pulp
20 llbs/hr Pulpy Juice
100 lbs/hr
Fresh Juice12.5%
Solids
80 lbs/hrStrainedJuice
9.8 lbs/hrConc.58%
Solids
29.8 lbs/hrConcentratedJuice42% Solids
70.2 lbs/hrWater
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Food Science & Technology - FST 650
ENERGY BALANCE EXAPMLE
110 F. 212 F.
HOT WATER
5,000 lbs/hr
70 F. 172 F.CRUDE OIL10,000 lbs/hr
HEAT EXCHANGER
q = m Cv (Tinitial - Tfinal)
Q = heat, m = mass, Cv = specific heat, T = temperature
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Food Science & Technology - FST 650
PROCESS OPTIMIZATION
APPROACHES
EXPERIMENTAL DESIGNS
Screening
Full Factorial
Fractional Factorial
Response Surface Methodology
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Food Science & Technology - FST 650
Question…Do the Process
Contitions and Formula Interact?
You betcha!!!
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Food Science & Technology - FST 650
ASSIGNMENT for FST 650
Prepare a flow sheet for your
process (except for energy anddetailed material balances)
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Food Science & Technology - FST 650
Key Takeaways - Process Flow Sheet
and Process Optimization Module
Process Flow Sheets are required in
product development Processes can help deliver a preferred
product
Processes need to be optimized