Heat transfer to and from a reaction flask is often a critical factor in controlling reaction rate. The heat transferred (q) depends on a heat transfer coefficient (h) for the flask material, the temperature difference (∆T) across the flask wall, and the commonly “wetted” area (A) of the flask and bath, q = hA∆T. When an exothermic reaction is run at a given T, there is a bath temperature at which the reaction can no longer be controlled, and the reaction “runs away” suddenly. A similar problem is often seen when a reaction is “scaled up” from, say, a half-filled small flask to a half-filled large flask. Explain these behaviors.
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
Heat transfer to and from a reaction flask is often a
critical factor in controlling reaction rate. The heat transferred (q)
depends on a heat transfer coefficient (h) for the flask material,
the temperature difference (∆T) across the flask wall, and the
commonly “wetted” area (A) of the flask and bath, q = hA∆T.
When an exothermic reaction is run at a given T, there is a bath
temperature at which the reaction can no longer be controlled, and
the reaction “runs away” suddenly. A similar problem is often seen
when a reaction is “scaled up” from, say, a half-filled small flask to
a half-filled large flask. Explain these behaviors.
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