8. A waste heat recovery boler produces 1 MPa dry saturated steam from 100 C feedwater. The boiler receives hot gases Cp 1.0) at 4.2 kg per sec at a temperature of 950 C. After passing through the waste heat boiller, the temperature of hot gases has been reduced to 250 C. How much steam in kg is produced per hour? Note: At 1 MPa dry saturated, h 2778.1 k/kg. A. 4487.8 kg B. 48478 kg C 4748.8 kg D. 4887.4 kg

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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18. A waste heat recovery boler produces 1 MPa dry saturated steam from 100 'C
feedwater. The boiler receives hot gases(Cp 1.0) at 4.2 kg per sec at a temperature
of 950 C. After passing through the waste heat boiler, the temperature of hot gases
has been reduced to 250 C. How much steam in kg is produced per hour? Note: At 1
MPa dry saturated, h 2778.1 k/kg.
A 4487.8 kg B. 4847.8 kg C. 4748.8 kg D. 4887.4 kg
Transcribed Image Text:18. A waste heat recovery boler produces 1 MPa dry saturated steam from 100 'C feedwater. The boiler receives hot gases(Cp 1.0) at 4.2 kg per sec at a temperature of 950 C. After passing through the waste heat boiler, the temperature of hot gases has been reduced to 250 C. How much steam in kg is produced per hour? Note: At 1 MPa dry saturated, h 2778.1 k/kg. A 4487.8 kg B. 4847.8 kg C. 4748.8 kg D. 4887.4 kg
7. A 16-cylinder diesel engine is directly coupled to a 2400 volts, 3300 kw alternator.
The engine consumes 1.252 drums of 25 API diesel fuel with energy output of 990
kw-hrs. The mechanical efficiency of the engine is 83% and the alternator efficiency
is 92%. Assume a drum of fuel contains 200 liters. Find the engine fuel rate in
kg/bhp-hr.
15.
D. 0.751
A. 0.571
B. 0.715
C.0.157
16.
Transcribed Image Text:7. A 16-cylinder diesel engine is directly coupled to a 2400 volts, 3300 kw alternator. The engine consumes 1.252 drums of 25 API diesel fuel with energy output of 990 kw-hrs. The mechanical efficiency of the engine is 83% and the alternator efficiency is 92%. Assume a drum of fuel contains 200 liters. Find the engine fuel rate in kg/bhp-hr. 15. D. 0.751 A. 0.571 B. 0.715 C.0.157 16.
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