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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Chapter 10, Problem 10.34P
(a)
To determine
The boiling regime for operation of chip after power dissipation return to its designed value.
(b)
To determine
The reduction in clock speed relative to design value to return to nucleate boiling regime.
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Figure 2. Boiling mechanisms for water.
Table 1. Heating Resistor Features.
Features and Benefits
Power rating of 17.0608 Btu/min
• Diameter of 10 mm
Length of 65 mm
Quartz resistance wire for maximum heater life
• TIG-welded end disc prevents contamination and
moisture absorption
Fibreglass lead wire insulation
• Complies with Electrostatic Control Standards
ANSI/ESD S20.20:2014 and BS EN 61340-5-
1:2007
ROHS compliant on restricted hazardous substances
4 (W/m)
Water is to be boiled at atmospheric pressure in a polished copper pan placed on top of a
heating unit. The diameter of the bottom of the pan is 00.2 m. If during 30 minutes the water
level is dropped by 0.1 m, calculate the inner surface of the bottom of the pan.
Assumptions 1 Steady operating conditions exist. 2 Heat losses from the heater and the pan
are negligible 3 The boiling regime is nucleate boiling.
Note. Write your answer step by step and clearly explain your work. You need to upload a
file.
*** 32. A double-chambered container contains one mole of helium in one of its 1000 cm³
Pull to
volume chambers. The container is well-insulated, and of low specific heat, so that no appre-
remove
ciable heat is added to the gas during the process we describe. The gas is initially at a tempera-
ture of 300 K and a pressure of 1 atmosphere. The partition between the two chambers is then
quickly raised, and the gas expands freely to fill the entire container. Whenever a monatomic
gas like helium doubles its volume adiabatically like this, the pressure in the gas will drop to
0.315 of what it was before (for reasons that we did not explain in this chapter), so the final
1000 cm3
1000 cm³
pressure of the expanded gas will be 0.315 atmospheres.
a) What is the temperature of the gas after the expansion?
b) What is the change in the internal energy of the gas?
c) How much heat is added to the gas? [Hint: Maybe read the problem again.]
d) How much work is done by the gas as it expands? [Hint:…
Chapter 10 Solutions
Fundamentals of Heat and Mass Transfer
Ch. 10 - Show that, for water at 1-atm pressure with...Ch. 10 - The surface of a horizontal. 7-mm-diameter...Ch. 10 - The role of surface tension in bubble formation...Ch. 10 - Estimate the heat transfer coefficient, h,...Ch. 10 - Prob. 10.5PCh. 10 - Prob. 10.6PCh. 10 - Prob. 10.7PCh. 10 - Prob. 10.8PCh. 10 - Calculate the critical heat flux on a large...Ch. 10 - Prob. 10.11P
Ch. 10 - Prob. 10.12PCh. 10 - Prob. 10.13PCh. 10 - Prob. 10.15PCh. 10 - Prob. 10.16PCh. 10 - Consider a gas-fired boiler in which five coiled,...Ch. 10 - Prob. 10.18PCh. 10 - Prob. 10.19PCh. 10 - Prob. 10.20PCh. 10 - Prob. 10.22PCh. 10 - Prob. 10.24PCh. 10 - Prob. 10.25PCh. 10 - A small copper sphere, initially at a uniform,...Ch. 10 - Prob. 10.28PCh. 10 - A disk-shaped turbine rotor is heat-treated by...Ch. 10 - A steel bar, 20 mm in diameter and 200 mm long,...Ch. 10 - Electrical current passes through a horizontal....Ch. 10 - Consider a horizontal. D=1 -mm-diameter platinum...Ch. 10 - Prob. 10.34PCh. 10 - Prob. 10.35PCh. 10 - Prob. 10.36PCh. 10 - Prob. 10.37PCh. 10 - A polished copper sphere of 10-mm diameter,...Ch. 10 - Prob. 10.39PCh. 10 - Prob. 10.40PCh. 10 - Consider refrigerant R-134a flowing in a smooth,...Ch. 10 - Determine the tube diameter associated with p=1...Ch. 10 - Saturated steam at 0.1 bar condenses with a...Ch. 10 - Prob. 10.45PCh. 10 - Prob. 10.46PCh. 10 - Prob. 10.47PCh. 10 - Prob. 10.48PCh. 10 - Prob. 10.50PCh. 10 - Prob. 10.53PCh. 10 - The condenser of a steam power plant consists of...Ch. 10 - Prob. 10.56PCh. 10 - Prob. 10.61PCh. 10 - Prob. 10.62PCh. 10 - A technique for cooling a multichip module...Ch. 10 - Determine the rate of condensation on a 100-mm...Ch. 10 - Prob. 10.66PCh. 10 - Prob. 10.67PCh. 10 - Prob. 10.70PCh. 10 - Prob. 10.71PCh. 10 - Prob. 10.74PCh. 10 - Prob. 10.75PCh. 10 - A thin-walled cylindrical container of diameter D...
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