Solutions for Fundamentals of Heat and Mass Transfer
Problem 1.1P:
The thermal conductivity of a sheet of rigid, extrudedinsulationis reported to be k=0.029W/mK ....Problem 1.2P:
The heat flux that is applied to the left face of a planewall is q=20W/m2 . The wall is of thickness...Problem 1.3P:
A concrete wall, which has a surface area of 20m2 andis 0.30 in thick, separates conditioned room...Problem 1.4P:
The concrete slab of a basement is 11 in long. 8 in wide,and 0.20 m thick. During the winter,...Problem 1.5P:
Consider Figure 1.3. The heat flux in the x-direction is qxn=10W/m2 , the thermal conductivity and...Problem 1.6P:
The heal flux through a wood slab 50 mm thick, whoseinner and outer surface temperatures are 40 and...Problem 1.7P:
The inner and outer surface temperatures of a glassWindow 5 mm thick are 1 5 and 5°C. What is the...Problem 1.8P:
A thermodynamic analysis of a proposed Brayton cyclegas turbine yields P=5MW of net power...Problem 1.9P:
A glass window of width W=1m and height H=2m is 5 mm thick and has a thermal conductivity of...Problem 1.10P:
A freezer compartment consists of a cubical cavity that is 2 mon a side. Assume the bottom to be...Problem 1.11P:
The heat flux that is applied to one face of a plane wallis q=20W/m2 . The opposite face is exposed...Problem 1.12P:
An inexpensive food and beverage container is fabricated from 25-mm-thick polystyrene (k=0.023W/mK)...Problem 1.13P:
What is the thickness required of a masonry wall havingthermal conductivity 0.75W/mK if the heat...Problem 1.14P:
A wall is made from an inhomogeneous (nonuniform)material for which the thermal conductivity...Problem 1.15P:
The 5-mm-thick bottom of a 200-mm-diameter panmay be made from aluminum (k=240W/mK) orcopper...Problem 1.16P:
A square silicon chip (k=150W/mK) is of width w=5mm on a side and of thickness t=1mm . Thechip is...Problem 1.17P:
For a boiling process such as shown in Figure 1.5 c, theambient temperature T in Newton’s law of...Problem 1.18P:
You’ve experienced convection cooling if you’ve everextended your hand out the window of a moving...Problem 1.19P:
Air at 40°C flows over a long, 25-mm-diameter cylinderwith an embedded electrical heater. In a...Problem 1.20P:
A wall has inner and outer surface temperatures of 16and 6°C, respectively. The interior and...Problem 1.21P:
An electric resistance heater is embedded in a longcylinder of diameter 30 mm. When water with a...Problem 1.22P:
The free convection heat transfer coefficient on a thinhot vertical plate suspended in still air can...Problem 1.23P:
A transmission case measures W=0.30m on a sideand receives a power input of Pi=150hp from theengine....Problem 1.24P:
A cartridge electrical heater is shaped as a cylinder oflength L=200mm and outer diameter D=200mm ....Problem 1.25P:
A common procedure for measuring the velocity of anairstream involves the insertion of an...Problem 1.26P:
A square isothermal chip is of width w=5mm on aside and is mounted in a substrate such that its side...Problem 1.27P:
The temperature controller for a clothes dryer consists of a bimetallic switch mounted on an...Problem 1.28P:
An overhead 25-m-long, uninsulated industrial steampipe of 100-mm diameter is routed through a...Problem 1.29P:
Under conditions for which the same room temperatureis maintained by a heating or cooling system, it...Problem 1.30P:
A spherical interplanetary probe of 0.5-m diameter contains electronics that dissipate 150 W. It the...Problem 1.31P:
An instrumentation package has a spherical outer surfaceof diameter D=100mm and emissivity =0.25 ....Problem 1.32P:
Consider the conditions of Problem 1.22. However, nowthe plate is in a vacuum with a surrounding...Problem 1.33P:
If TsTsur in Equation 1.9, the radiation heat transfer coefficient may be approximated as hr,a=4T3...Problem 1.34P:
A vacuum system, as used ¡n sputtering electrically conducting thin films on microcircuits, is...Problem 1.35P:
An electrical resistor is connected to a battery, asshown schematically. After a brief transient,...Problem 1.36P:
Pressurized water (pin=10bar,Tin=110C) enters thebottom of an L=10-m-long vertical tube of diameter...Problem 1.37P:
Consider the tube and inlet conditions of Problem 1.36.Heat transfer at a rate of q=3.98MW is...Problem 1.38P:
An internally reversible refrigerator has a modifiedcoefficient of performance accounting for...Problem 1.39P:
A household refrigerator operates with cold- andhot-temperature reservoirs et Tc=5C and Th=25C ,...Problem 1.40P:
Chips of width L=15mm on a side are mounted to asubstrate that is installed in an enclosure whose...Problem 1.41P:
Consider the transmission case of Problem 1 .23,butnow allow for radiation exchange with the...Problem 1.42P:
One method for growing thin silicon sheets for photo voltaic solar panels is to pass two thin...Problem 1.43P:
Heat is transferred by radiation and convection betweenthe inner surface of the nacelle of the wind...Problem 1.44P:
Radioactive wastes are packed in a long, thin-walledcylindrical container. The wastes generate...Problem 1.45P:
An aluminum plate 4 mm thick is mounted in a horizontal position, and its bottom surface ¡s well...Problem 1.46P:
A blood warmer is to be used during the transfusion ofblood to a patient. This device is to heat...Problem 1.47P:
Consider a carton of milk that is refrigerated at a temperature of Tm=5C . The kitchen temperature...Problem 1.49P:
Liquid oxygen, which has a boiling into of 90 K and a latent heat of vaporization of 214 kJ/kg, is...Problem 1.50P:
The emissivity of galvanized steel sheet, a commonroofing material, is =0.13 at temperatures...Problem 1.51P:
Three electric resistance heaters of length L=250mm and diameter D=25mm are submerged in a 10-gal...Problem 1.52P:
A hair dryer may be idealized as a circular duct through which a small fan draws ambient air and...Problem 1.53P:
In one stage of an annealing process, 304 stainless steelsheet is taken from 300 K to 1250 K as it...Problem 1.54P:
Convection ovens operate on the principle of inducing forced convection inside the oven chamber with...Problem 1.55P:
Annealing, an important step ¡n semiconductor materials processing, can be accomplished by rapidly...Problem 1.56P:
In the thermal processing of semiconductor materials,annealing ¡s accomplished by heating a silicon...Problem 1.57P:
A furnace tor processing semiconductor materials isformed by a silicon carbide chamber that is...Problem 1.59P:
Consider the wind turbine of Example 1.3. To reduce thenacelle temperature to Ts=30C , the nacelle...Problem 1.60P:
Consider the conducting rod of Example 1.4 understeady-slate conditions. As suggested in Comment 3,...Problem 1.61P:
A long bus bar (cylindrical rod used for making electrical connections) of diameter D is installed...Problem 1.63P:
A 50mm45mm20mm cell phone chargerhas a surface temperature of Ts=33C when plugged into an electrical...Problem 1.64P:
A spherical, stainless steel (AISI 302) canister is used tostore reacting chemicals that provide for...Problem 1.65P:
A freezer compartment is covered with a 2-mm-thicklayer of frost at the time it malfunctions. If...Problem 1.66P:
A vertical slab of Wood’s metal is joined to a substrate onone surface and is incited as it is...Problem 1.67P:
A photovoltaic panel of dimension 2m4m isinstalled on the root of a home. The panel is...Problem 1.68P:
Following the hot vacuum forming of a paper-pulpmixture, the product, an egg carton, is transported...Problem 1.70P:
A computer consists of an array of five printed circuit boards (PCBs), each dissipating Pb=20W of...Problem 1.72P:
The roof of a car in a parking lot absorbs a solar radiant flux of 800W/m2 , and the underside is...Problem 1.73P:
Consider the conditions of Problem 1.22,but the surroundings temperature is 25°C and radiation...Problem 1.74P:
Most of the energy we consume as food ¡s converted tothermal energy in the process of performing all...Problem 1.76P:
The wall of an oven used to cure plastic parts is ofthickness L=0.05m and is exposed to large...Problem 1.77P:
An experiment to determine the convection coefficientassociated with airflow over the surface of a...Problem 1.78P:
A thin electrical heating element provides a uniformheat flux q0 to the outer surface of a duct...Problem 1.79P:
A rectangular forced air healing duct is suspended fromthe ceiling of a basement whose air and walls...Problem 1.80P:
Consider the steam pipe of Example 1.2. The facilitiesmanager wants you to recommend methods for...Problem 1.81P:
During its manufacture, plate glass at 600°C is cooledby passing air over its surface such that the...Problem 1.82P:
The curing press of Example 1.9 involves exposure of the plate to irradiation from an infrared lamp...Problem 1.83P:
The diameter and surface emissivity of an electricallyheated plate are D=300mm and =0.80,...Browse All Chapters of This Textbook
Chapter 1 - IntroductionChapter 2 - Introduction To ConductionChapter 3 - One-dimensional, Steady-state ConductionChapter 4 - Two-dimensional, Steady-state ConductionChapter 5 - Transient ConductionChapter 6 - Introduction To ConvectionChapter 7 - External FlowChapter 8 - Internal FlowChapter 9 - Free ConvectionChapter 10 - Boiling And Condensation
Book Details
Completely updated, the seventh edition provides engineers with an in-depth look at the key concepts in the field. It incorporates new discussions on emerging areas of heat transfer, discussing technologies that are related to nanotechnology, biomedical engineering and alternative energy. The example problems are also updated to better show how to apply the material. And as engineers follow the rigorous and systematic problem-solving methodology, they'll gain an appreciation for the richness and beauty of the discipline.
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