What category of boiler can respond quickly to rapid load fluctuations____________________?
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Answer: E. forced circulation type
Explanation
Forced circulation boilers use mechanical pumps to maintain positive and rapid water flow through tubes. This forced circulation increases heat transfer rates and allows the boiler to adapt quickly to load changes. Natural circulation boilers rely on density differences, making them slower to respond to rapid fluctuations. Boiler circulation systems deliver feedwater to evaporator tubes where high heat absorption generates steam. Rapid load fluctuations require instant adjustments in steam generation to maintain steady system pressure. Pumps ensure reliable fluid movement regardless of operating pressure or steam production rates.
Modern utility power plants use forced circulation boilers to handle variable electrical grid demands. Industrial processes needing fast steam supply adjustments rely on forced circulation boiler technology. Designing responsive boilers prevents dangerous pressure drops or thermal shock during sudden load spikes. Option A describes vertical fire tube boilers, which have limited water capacity and slow response. Option B represents horizontal fire tube boilers, common in older stationary applications with slow response. Option C features natural water circulation driven by thermal buoyancy rather than positive pump action.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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