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A boiler feed pump takes water from a tank at 95°C and 100 kPa absolute (1 bar) and delivers it at 190°C and 2000 kPa absolute (20 bar). The flow is steady, and the heat loss from the pump is 2 kJ/kg of water passing through it. What is the work input to

A boiler feed pump takes water from a tank at 95°C and 100 kPa absolute (1 bar) and delivers it at 190°C and 2000 kPa absolute (20 bar). The flow is steady, and the heat loss from the pump is 2 kJ/kg of water passing through it. What is the work input to

Elements Of Electromagnetics
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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h in = 398 kJ/kg, h out = 808 kJ/kg, ρ = 962 kg/m 3. You do not need to rework the problem with steam table values.

Answer: 412 kJ/ kg

4.7.* A boiler feed pump takes water from a tank at 95°℃ and 100 kPa absolute (1 bar) and delivers it at 190°C and 2000 kPa absolute (20 bar). The flow is steady, and the heat loss from the pump is 2 kJ/kg of water passing through it. What is the work input to the pump in kJ/kg of water passing through it? Here use the density of water at 1 atm and 20°C. If you have access to a steam table [3], rework the problem using the values from it, and comment on how much different the answer is.
Transcribed Image Text:4.7.* A boiler feed pump takes water from a tank at 95°℃ and 100 kPa absolute (1 bar) and delivers it at 190°C and 2000 kPa absolute (20 bar). The flow is steady, and the heat loss from the pump is 2 kJ/kg of water passing through it. What is the work input to the pump in kJ/kg of water passing through it? Here use the density of water at 1 atm and 20°C. If you have access to a steam table [3], rework the problem using the values from it, and comment on how much different the answer is.
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