7. A fire tube boiler develops 75,000 kilograms of steam at a pressure of 12,500 kpa and a temperature of 660°C for a period of 8 hours. The feedwater temperature is maintained at 95°C. If the boiler efficiency is 87.5%, find the average amount of coal burned in lb/min if its heating value is 52,337.5 KJ/kg.

7. A fire tube boiler develops 75,000 kilograms of steam at a pressure of 12,500 kpa and a temperature of 660°C for a period of 8 hours. The feedwater temperature is maintained at 95°C. If the boiler efficiency is 87.5%, find the average amount of coal burned in lb/min if its heating value is 52,337.5 KJ/kg.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

7. A fire tube boiler develops 75,000 kilograms of steam at a pressure of 12,500 kpa and a temperature
of 660°C for a period of 8 hours. The feedwater temperature is maintained at 95°C. If the boiler
efficiency is 87.5%, find the average amount of coal burned in lb/min if its heating value is 52,337.5
KJ/kg.
a.) 25.6 lb/min
b.) 32.1 lb/min
c.) 18.8 fb/min
d.) 12.4 lb/min

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