Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effects in evaporation ?
Correct answer: A. Both B. & C.
- A. Both B. & C.
- B. Increases economy
- C. Does not affect the capacity
- D. Increases capacity
Explanation
Multiple-effect evaporation reuses vapour from one effect to heat the next, so less live steam is needed per unit of evaporation and steam economy increases. In the usual ideal comparison, it does not change the total evaporation capacity, giving both B and C.
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