Q1- A boiler generates 500 kg/h of steam at 16 bar and 300C from feed water at 30°C. Coal used is 60 kg/h of C.V 30000 kJ/kg. Find equivalent of evaporation and boiler efficiency. Ans(10.75 kg/kgf 80.9%) Q2// For simple Rankine cycle, the steam used by the turbine is 5.4 kg/kWh at a pressure of 50 bar and a temperature of 350°C. The efficiency of the boiler is 82% with feed water at 150 °C. a- How many kg of coal are required per kWh? The Calorific value of fuel is 28100kJ/kg. b-if the cost of coal is 10S per ton, then what is the fuel cost per kWh. Ans(82%, 5.72E-3)
Q1- A boiler generates 500 kg/h of steam at 16 bar and 300C from feed water at 30°C. Coal used is 60 kg/h of C.V 30000 kJ/kg. Find equivalent of evaporation and boiler efficiency. Ans(10.75 kg/kgf 80.9%) Q2// For simple Rankine cycle, the steam used by the turbine is 5.4 kg/kWh at a pressure of 50 bar and a temperature of 350°C. The efficiency of the boiler is 82% with feed water at 150 °C. a- How many kg of coal are required per kWh? The Calorific value of fuel is 28100kJ/kg. b-if the cost of coal is 10S per ton, then what is the fuel cost per kWh. Ans(82%, 5.72E-3)
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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Transcribed Image Text:Q1- A boiler generates 500 kg/h of steam at 16 bar and 300C from feed water at 30°C. Coal used is 60
kg/h of C.V 30000 kJ/kg. Find equivalent of evaporation and boiler efficiency. Ans(10. 75 kgs/kgf 80.9%)
Q2// For simple Rankine cycle, the steam used by the turbine is 5.4 kg/kWh at a pressure of 50 bar and a
temperature of 350°C. The efficiency of the boiler is 82% with feed water at 150 °C.
a- How many kg of coal are required per kWh? The Calorific value of fuel is 28100kJ/kg.
b-if the cost of coal is 10S per ton, then what is the fuel cost per kWh. Ans(82%, 5.72E-3)
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