How many steam drums are incorporated in a Benson steam generator design_________________?
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Answer: D. no drum
Explanation
The Benson boiler is designed as a once-through forced-flow steam generator operating at or above supercritical pressures. Because water converts directly into superheated steam in a single continuous tube circuit, steam separation drums are unnecessary. Eliminating heavy pressure drums allows the Benson boiler to respond rapidly to changing load demands without drum stress limits. Once-through boilers feed water into one end of a continuous tube and discharge superheated steam from the other end. Supercritical steam generators operate above the critical pressure where water transforms directly into vapor without boiling. Removing thick-walled steam drums significantly reduces construction costs and eliminates traditional drum explosion hazards.
Option A of one drum describes traditional subcritical drum-type boilers rather than once-through Benson designs. Option B of two drums is incorrect because drumless once-through systems use zero steam or water drums. Option C incorrectly lists steam and water drums, which apply to natural circulation boilers rather than once-through units.
- Subject
- Engineering
- Category
- Mechanical Engineering
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- —
- Difficulty
- medium
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