In a single evaporator system, the steam economy ________________ by creating vacuum in the evaporator?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remain constant
- D. May increase or decrease, depends on the vacuum
Explanation
Creating a vacuum lowers the boiling temperature, usually reducing the sensible heat needed to bring the feed to its boiling point; therefore more of the supplied steam heat produces evaporation. Under the standard evaporator assumption, the steam economy increases.
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