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Nitrogen (N2 ) flows steadily through a constant-area pipe. The N2 enters the pipe at 3.5 MPa, 60 °C, a velocity of 10 m/s, and a mass flow rate of 160 kg/h. At the exit of the pipe the N2 pressure is 0.2 MPa and the temperature is 50 °C. Determine a) the cross-sectional area of the pipe, b) the exit velocity of the nitrogen, and c) the rate of heat transfer to the nitrogen in the pipe.

Nitrogen (N2 ) flows steadily through a constant-area pipe. The N2 enters the pipe at 3.5 MPa, 60 °C, a velocity of 10 m/s, and a mass flow rate of 160 kg/h. At the exit of the pipe the N2 pressure is 0.2 MPa and the temperature is 50 °C. Determine a) the cross-sectional area of the pipe, b) the exit velocity of the nitrogen, and c) the rate of heat transfer to the nitrogen in the pipe.

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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FIRST LAW OF THERMODYNAMICS CONSERVATION OF ENERGY – OPEN SYSTEM

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FIRST LAW OF THERMODYNAMICS CONSERVATION OF ENERGY – OPEN SYSTEM Nitrogen (N2 ) flows steadily through a constant-area pipe. The N2 enters the pipe at 3.5 MPa, 60 °C, a velocity of 10 m/s, and a mass flow rate of 160 kg/h. At the exit of the pipe the N2 pressure is 0.2 MPa and the temperature is 50 °C. Determine a) the cross-sectional area of the pipe, b) the exit velocity of the nitrogen, and c) the rate of heat transfer to the nitrogen in the pipe. Ans: A =1.255 cm² ; Vout =169.8 m/s; Q = 632.2 kJ/h
Transcribed Image Text:FIRST LAW OF THERMODYNAMICS CONSERVATION OF ENERGY – OPEN SYSTEM Nitrogen (N2 ) flows steadily through a constant-area pipe. The N2 enters the pipe at 3.5 MPa, 60 °C, a velocity of 10 m/s, and a mass flow rate of 160 kg/h. At the exit of the pipe the N2 pressure is 0.2 MPa and the temperature is 50 °C. Determine a) the cross-sectional area of the pipe, b) the exit velocity of the nitrogen, and c) the rate of heat transfer to the nitrogen in the pipe. Ans: A =1.255 cm² ; Vout =169.8 m/s; Q = 632.2 kJ/h
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