In a boiler of a steam power plant the incoming water is heated to steam by hot gas flowing around the tube. The hot gas is produced by combustion of coal. Consider the pressure of water flowing through the tube to be 4 MPa. Water enters the tube at a velocity of 0.1 m/s and a temperature of 50 °C. The tube diameter is 2.5 cm. The hot gas flowing around the tube is at 1000 °C. The water needs to reach the saturation temperature of 250 °C. Assuming bulk mean temperature of water to be 600 °C, and the determine the average convective heat transfer coefficient to be 80 W/m².K, determine what should be the length of the pipe.

In a boiler of a steam power plant the incoming water is heated to steam by hot gas flowing around the tube. The hot gas is produced by combustion of coal. Consider the pressure of water flowing through the tube to be 4 MPa. Water enters the tube at a velocity of 0.1 m/s and a temperature of 50 °C. The tube diameter is 2.5 cm. The hot gas flowing around the tube is at 1000 °C. The water needs to reach the saturation temperature of 250 °C. Assuming bulk mean temperature of water to be 600 °C, and the determine the average convective heat transfer coefficient to be 80 W/m².K, determine what should be the length of the pipe.

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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Question

In a boiler of a steam power plant the incoming water is heated to steam by hot gas
flowing around the tube. The hot gas is produced by combustion of coal. Consider the
pressure of water flowing through the tube to be 4 MPa. Water enters the tube at a
velocity of 0.1 m/s and a temperature of 50 °C. The tube diameter is 2.5 cm. The hot gas
flowing around the tube is at 1000 °C. The water needs to reach the saturation
temperature of 250 °C. Assuming bulk mean temperature of water to be 600 °C, and the
determine the average convective heat transfer coefficient to be 80 W/m².K, determine
what should be the length of the pipe.

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