Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 1, Problem 1.15P
Repeat Problem 1-10 for air at 10 C, a tube with diameter 25 mm, a stream pressure of 101 kPa, and a tube length of 4 m, and find the heat transfer coefficient in SI units if the heat transfer rate is 1250 W.
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Answer this ASAP
The diameter of the tube is 25 mm.
The specific heat of water is 4.18 kJ/kg. °C.
The overall heat transfer coefficient is 0.7 kW/m².°C.
1.Cmin
2.Maximum heat transfer rate
3.Heat transfer surface area
Q2:-
A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at
t=0) when it inserted into a gas having a temperature of 25 °C. After 65
s the temperature of the sphere reach 60 °C. Make the appropriate
assumption to find the heat transfer coefficient of the gas. What is the
temperature of the sphere after 80 s.
(A;=TT D2, V= TT D³/6, Lc=V/ A,)
Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly
immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is
50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.ºC and thermal
conductivity= 204W/m°C. Determine th Bi number and
And determine the time required to cool sphere to 263k
Chapter 1 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
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