Q4/ The feed water to a boiler enters an economizer at 32°C and leaves at 120°C, being feed into the boiler at this temp, the steam leaves the boiler 0.95 dry at 2 MPa and passes through a superheater where its temperature is raised to 250°C without change of pressure, the steam output is 8.2 kg/kg of coal burned and the HHV of the coal is 28000 kJ/kg. Calculated the energy picked up per kg of water and steam in a - the economizer. b- the boiler. c- the superheater. Take the specific heat of superheated steam =2.093 kJ/kg K, cpw = 4.187 kJ/kg.K and expressing the answering as percentages of the energy supplied by the coal.

Q4/ The feed water to a boiler enters an economizer at 32°C and leaves at 120°C, being feed into the boiler at this temp, the steam leaves the boiler 0.95 dry at 2 MPa and passes through a superheater where its temperature is raised to 250°C without change of pressure, the steam output is 8.2 kg/kg of coal burned and the HHV of the coal is 28000 kJ/kg. Calculated the energy picked up per kg of water and steam in a - the economizer. b- the boiler. c- the superheater. Take the specific heat of superheated steam =2.093 kJ/kg K, cpw = 4.187 kJ/kg.K and expressing the answering as percentages of the energy supplied by the coal.

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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