The following data was recorded during a test performed on a steam plant consisting of a Lancashire boiler, economiser and a superheater. Steam generated = 5,000 kg/hr at 14 bar pressure %3D Mass of coal burnt = = 670 kg/hr Calorific value of coal = 29500 kJ/kg %3D Temperature of feed water at entry and exit of economiser = 30°C and 130 C respectively. Temperature of steam leaving the superheater = 320 °C. Dryness fraction of steam leaving the boiler = 0.97 C, (superheated steam) = 2.3 kJ/kg-K Cp (water) = 4.18 kJ/kg-K %3D Calculate: (1) Factor of evaporation. (2) Overall efficiency of the plant.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The following data was recorded during a test
performed on a steam plant consisting of a Lancashire
boiler, economiser and a superheater.
Steam generated = 5,000 kg/hr at 14 bar pressure
Mass of coal burnt = 670 kg/hr
%3D
Calorific value of coal = 29500 kJ/kg
Temperature of feed water at entry and exit of economiser
= 30°C and 130 C respectively.
= 320 °C.
Temperature of steam leaving the superheater
Dryness fraction of steam leaving the boiler = 0.97
c, (superheated steam) = 2.3 kJ/kg-K
4.18 kJ/kg-K
Cp (water)
%3D
Calculate:
(1) Factor of evaporation.
(2) Overall efficiency of the plant.
Transcribed Image Text:The following data was recorded during a test performed on a steam plant consisting of a Lancashire boiler, economiser and a superheater. Steam generated = 5,000 kg/hr at 14 bar pressure Mass of coal burnt = 670 kg/hr %3D Calorific value of coal = 29500 kJ/kg Temperature of feed water at entry and exit of economiser = 30°C and 130 C respectively. = 320 °C. Temperature of steam leaving the superheater Dryness fraction of steam leaving the boiler = 0.97 c, (superheated steam) = 2.3 kJ/kg-K 4.18 kJ/kg-K Cp (water) %3D Calculate: (1) Factor of evaporation. (2) Overall efficiency of the plant.
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