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Principles of Heat Transfer (Activate L...

8th Edition

Kreith, Frank; Manglik, Raj M.

Publisher: Cengage Learning

ISBN: 9781305387102

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Chapter

Section

Problem 1.1P:

1.1 On a cold winter day, the outer surface of a 0.2-m-thick concrete wall of a warehouse is exposed...

Problem 1.2P:

1.2 The weight of the insulation in a spacecraft may be more important than the space required. Show...

Problem 1.3P:

1.3 A furnace wall is to be constructed of brick having standard dimensions of Two kinds of...

Problem 1.4P:

1.4 To measure thermal conductivity, two similar 1-cm-thick specimens are placed in the apparatus...

Problem 1.5P:

To determine the thermal conductivity of a structural material, a large 15-cm-thick slab of the...

Problem 1.6P:

A square silicon chip 7mm7mm in size and 0.5-mm thick is mounted on a plastic substrate as shown in...

Problem 1.7P:

A cooling system is to be designed for a food storage warehouse for keeping perishable foods cool...

Problem 1.8P:

1.80 Describe and compare the modes of heat loss through the single-pane and double-pane window...

Problem 1.9P:

Heat is transferred at a rate of 0.1 kW through glass wool insulation (density=100kg/m3) with a 5-cm...

Problem 1.10P:

1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss...

Problem 1.11P:

1.11 Calculate the heat loss through a glass window 7-mm thick if the inner surface temperature is...

Problem 1.12P:

1.12 A wall with a thickness is made of a material with a thermal conductivity that varies with its...

Problem 1.13P:

1.13 If the outer air temperature in Problem is –2°C, calculate the convection heat transfer...

Problem 1.14P:

Using Table 1.4 as a guide, prepare a similar table showing the orders of magnitude of the thermal...

Problem 1.15P:

1.15 A thermocouple (0.8-mm-diameter wire) used to measure the temperature of the quiescent gas in a...

Problem 1.16P:

Water at a temperature of 77C is to be evaporated slowly in a vessel. The water is in a low-pressure...

Problem 1.17P:

The heat transfer rate from hot air by convection at 100C flowing over one side of a flat plate with...

Problem 1.18P:

The heat transfer coefficient for a gas flowing over a thin float plate 3-m long and 0.3-m wide...

Problem 1.19P:

1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the...

Problem 1.20P:

A high-speed computer is located in a temperature-controlled room at 26C. When the machine is...

Problem 1.21P:

1.21 In an experimental set up in a laboratory, a long cylinder with a 5-cm diameter, and an...

Problem 1.22P:

1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas...

Problem 1.23P:

Using the information in Problem 1.22, estimate the ambient air temperature that could cause...

Problem 1.24P:

Two large parallel plates with surface conditions approximating those of a blackbody are maintained...

Problem 1.25P:

1.25 A spherical vessel, 0.3 m in diameter, is located in a large room whose walls are at 27°C (see...

Problem 1.26P:

1.26 Repeat Problem 1.25 but assume that the surface of the storage vessel has an absorbance (equal...

Problem 1.27P:

Determine the rate of radiant heat emission in watts per square meter from a blackbody at (a) 15C,...

Problem 1.28P:

1.28 The sun has a radius of and approximates a blackbody with a surface temperature of about 5800...

Problem 1.29P:

1.29 A spherical interplanetary probe with a 30-cm diameter contains electronic equipment that...

Problem 1.30P:

1.30 A small gray sphere having an emissivity of 0.5 and a surface temperature of 537°C is located...

Problem 1.31P:

A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The...

Problem 1.32P:

A long wire 0.7 mm in diameter with an emissivity of 0.9 is placed in a large quiescent air space at...

Problem 1.33P:

Wearing layers of clothing in cold weather is often recommended because dead-air spaces between the...

Problem 1.34P:

A section of a composite wall with the dimensions shown below has uniform temperatures of 200C and...

Problem 1.35P:

A section of a composite wall with the dimensions shown below has uniform temperatures of 200C and...

Problem 1.36P:

Repeat Problem 1.35 but assume that instead of surface temperatures, the given temperatures are...

Problem 1.37P:

1.37 Mild steel nails were driven through a solid wood wall consisting of two layers, each 2.5-cm...

Problem 1.38P:

1.38 Calculate the rate of heat transfer through the composite wall in Problem 1.37 if the...

Problem 1.39P:

1.39 On a cold winter day, the outside wall of a home is exposed to an air temperature of when the...

Problem 1.40P:

As a designer working for a major electric appliance manufacturer, you are required to estimate the...

Problem 1.41P:

1.41 A heat exchanger wall consists of a copper plate 2 cm thick. The heat transfer coefficients on...

Problem 1.42P:

A submarine is to be designed to provide a comfortable temperature of no less than 21C for the crew....

Problem 1.43P:

1.43 A simple solar heater consists of a flat plate of glass below which is located a shallow pan...

Problem 1.44P:

A composite refrigerator wall is composed of 5 cm of corkboard sandwiched between a 1.2-cm-thick...

Problem 1.45P:

An electronic device that internally generates 600 mW of heat has a maximum permissible operating...

Problem 1.46P:

1.46 To reduce home heating requirements, modern building codes in many parts of the country...

Problem 1.47P:

1.47 A flat roof is modeled as a flat plate insulated on the bottom and placed in the sunlight. If...

Problem 1.48P:

A horizontal, 3-mm-thick flat-copper plate, 1-m long and 0.5-m wide, is exposed in air at 27C to...

Problem 1.49P:

1.49 A small oven with a surface area of is located in a room in which the walls and the air are at...

Problem 1.50P:

A steam pipe 200 mm in diameter passes through a large basement room. The temperature of the pipe...

Problem 1.51P:

1.51 The inner wall of a rocket motor combustion chamber receives by radiation from a gas at . The...

Problem 1.52P:

1.52 A flat roof of a house absorbs a solar radiation flux of . The backside of the roof is well...

Problem 1.53P:

Determine the power requirement of a soldering iron in which the tip is maintained at 400C. The tip...

Problem 1.54P:

1.54 The soldering iron tip in Problem 1.53 becomes oxidized with age and its gray-body emittance...

Problem 1.55P:

1.55 Some automobile manufacturers are currently working on a ceramic engine block that could...

Problem 1.56P:

A pipe carrying superheated steam in a basement at 10C has a surface temperature of 150C. Heat loss...

Problem 1.57P:

1.57 The walls of a typical industrial furnace used for the heat treating of metals are usually a...

Problem 1.58P:

Draw the thermal circuit for heat transfer through a double-glazed or a double-paned window....

Problem 1.59P:

The ceiling of a tract house is constructed of wooden studs with fiberglass insulation between them....

Problem 1.60P:

1.60 Two electric resistance heaters with a 20 cm length and a 2 cm diameter are inserted into a...

Problem 1.61P:

In Problem 1.60, instead of diffusive heating (or by conduction), consider that the water is heated...

Problem 1.62P:

A homeowner wants to replace an electric hot-water heater. There are two models in the store. The...

Problem 1.63P:

1.63 Liquid oxygen (LOX) for the space shuttle is stored at 90 K prior to launch in a spherical...

Problem 1.64P:

The interior wall of a large, commercial walk-in type meat freezer is covered under normal operating...

Problem 1.65P:

1.65 Many specialized applications (ranging from advanced gas-turbine blades to medical devices and...

Problem 1.66P:

At the present time, radioactive waste from nuclear power plants is placed in long, thin-walled...

Problem 1.67P:

1.67 In beauty salons and in homes, a ubiquitous device is the hairdryer. The front end of a typical...

Problem 1.68P:

1.68 In Problem 1.67, the heat loss from the hairdryer duct enclosure was neglected. To a designer,...

Problem 1.69P:

The heat transfer coefficient between a surface and a liquid is 57 W/(m2K). How many watts per...

Problem 1.70P:

The thermal conductivity of fibreglass insulation at 67F is 0.02 Btu/h ft F. What is its value in SI...

Problem 1.71P:

1.71 The thermal conductivity of silver at 212°F is 238 Btu/h ft °F. What is the conductivity in SI...

Problem 1.72P:

1.72 An ice chest (see sketch) is to constructed from styrofoam . If the wall of the chest is 5-cm...

Problem 1.73P:

Estimate the R-values for a 5-cm-thick fiberglass board and a 2.5-cm-thick polyurethane foam layer....

Problem 1.74P:

A manufacturer in the United States wants to sell a refrigeration system to a customer in Germany....

Problem 1.75P:

Referring to Problem 1.74, how many kilograms of ice can a 3-ton refrigeration unit produce in a...

Problem 1.76P:

1.76 Explain a fundamental characteristic that differentiates conduction from convection and...

Problem 1.77P:

1.77 Explain each in your own words. (a) What is the mode of heat transfer through a large steel...

Problem 1.78P:

What are the important modes of heat transfer for a person sitting quietly in a room? What if the...

Problem 1.79P:

1.79 Consider the cooling of (a) a personal computer with a separate CPU and (b) a laptop computer....

Problem 1.80P:

Describe and compare the modes of heat loss through the single-pane and double-pane window...

Problem 1.82P:

Discuss the modes of heat transfer that determine the equilibrium temperature of the space shuttle...

Problem 1.1DP:

Optimum Boiler Insulation Package (Chapter 1) To insulate high-temperature surfaces it is economical...

We offer sample solutions for Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!) homework problems. See examples below:

Show more sample solutions

1.1 On a cold winter day, the outer surface of a 0.2-m-thick concrete wall of a warehouse is exposed...A plane wall, 7.5 cm thick, generates heat internally at the rate of 105 W/m3. One side of the wall...Consider a flat plate or a plane wall with a thickness L and a long cylinder of radius r0. Both of...
4.1 Show that in the limit as , the difference equation for one-dimensional steady conduction with...Evaluate the Reynolds number for flow over a tube from the following data: D=6cm,U=1.0m/s,...6.1 Determine the heat transfer coefficient at the stagnation point and the average value of the...7.1 To measure the mass flow rate of a fluid in a laminar flow through a circular pipe, a...Show that the coefficient of thermal expansion for an ideal gas is 1/T, where T is the absolute...Water at atmospheric pressure is boiling in a pot with a flat-copper bottom on an electric range...

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