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Once the total volume of an individual vessel has been established the detailed dimensions or mechanical design can be performed. Much of this is based on "Rules of Thumb" built from years of experience. A summary is provided below for a standard Stirred Tank Reactor (STR).
Perhaps the most important factor in the mechanical design of a bioreactor is the height to diameter or aspect ratio as this determines many of the other important bioreactor characteristics. There are relative advantages of increasing either the height or diameter.
(a) Increasing height
i. increases the hydrostatic pressure
Advantage - increases solubility of oxygen
Disadvantage - increases solubility of other gases which may be toxic, e.g. CO2 ii. allows more agitators
Advantage - better power development
Disadvantage - can lead to poor mixing due to compartmentalisation (b) Increasing diameter
i. lowers the superficial (linear) gas velocity
Disadvantage - poor mixing, oxygen transfer ii. reduces wall surface area (per unit volume) available for heat transfer
Disadvantage - leads to temperature control problems
Define fluid Mechanism
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Type of strain: There are basically four type of strain 1. Tensile strain 2. Compressive strain 3. Volumetric strain 4. Shear strain
Second Gear Position: When gear M2 on the main shaft is in mesh with gear C2 on the countershaft then this is known as second gear position. To rotate free gear M2 with the m
Illustrate various kinds of control systems. Illustrate several block diagram reduction rules with examples. Determine C/R by using block diagram reduction method.
Please help me solve the following problem. Steam is throttled from a pressure of 700kPa to 100kPa and a temp. of 100 degrees Celsius. Determine the dryness factor of the steam
Brazing Brazing is a group of welding processes, which produces, coalescence of materials by heating them to a specific temperature and by using a filler metal having a liquids a
what are the parts of wilson hartnell governor with their designation?
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