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What is the principle behind rising film evaporators?

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+2 votes
in Food Processing Unit Operations by (110k points)
What is the principle behind rising film evaporators?

(a) Thermo-siphon

(b) Thermostatic

(c) Thermodynamic

(d) Pareto

The question was asked in an interview for job.

Origin of the question is Evaporation Equipment in division Evaporation of Food Processing Unit Operations

1 Answer

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Best answer
The correct choice is (a) Thermo-siphon

For explanation: Thermo-siphon is a technique of passive heat exchange which is based on natural convection. It circulates a fluid without the requirement of a mechanical pump. Feed enters the bottom of the heating tubes and the steam begins to form. The mounting force of this steam produced during the boiling causes liquid and vapors to flow upwards in parallel flow.

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