Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470501979
Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 1, Problem 1.37P
Consider the tube and inlet conditions of Problem 1.36.Heat transfer at a rate of
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You are provided a horizontal tube with one entrance and one exit. Air (Cp = 1.005 kJ/(kg-K)) is passing through the pipe and is assumed ideal. The inlet conditions are 102 psia, 101 degrees Fahrenheit and velocity 9feet/second. Determine the outlet velocity (ft/s) and outlet temperature (degrees Fahrenheit) if the exit conditions are 2.1 psia. Assume the process occurs under adiabatic conditions
Water with a specific heat of 1 BTU/lbmoF is pumped using a 1-hp jet pump from a well that is 20 ft deep into a vented water vessel 160 ft above the ground. In the process, 400 BTU/min of heat is lost from the system. What is the temperature (oF) of the water as it enters the vessel if the flow rate of the water is 5 gal/min? Assume the temperature of water in the well is (35oF).
(a) A storage tank is connected to a piping system as illustrated in Figure P1. Water at temperature of 20°C
in the storage tank flows through a piping system with the pipe's diameter of 5 cm and discharges from a
nozzle to the atmospheric at velocity of 3.5 m/s. The diameter of the nozzle is 3cm. Galvanized pipe is
used and installed in this piping system. All the fitting components installed in this system such as
regular 90° and tees are flanged type.
Water at 20°C
21 m
D-5 cm
d-3 cm
Figure P1
i. By using suitable assumptions, predict the friction factor of this piping system (Including the Moody
Chart is necessary).
ii. According to the obtained friction factor in section P1(a), determine the possible pipe length of this
piping system
ii.
After 5 years of operation, the accumulation of the dirt and other micro particles stained on the
pipe's wall surface have significantly reduced the water discharge from the nozzle. Please explain
this phenomenon.
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Chapter 1 Solutions
Fundamentals of Heat and Mass Transfer
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