Questions from Principles Of Heat Transfer


Q: The sun has a radius of 7 * 108 m and approximates

The sun has a radius of 7 * 108 m and approximates a blackbody with a surface temperature of about 5800 K. Calculate the total rate of radiation from the sun and the emitted radiation flux per square...

See Answer

Q: In a manufacturing operation, a long strip of sheet metal is

In a manufacturing operation, a long strip of sheet metal is transported on a conveyor at a velocity of 2 m/s while a coating on its top surface is to be cured by radiant heating. Suppose that infrare...

See Answer

Q: Evaluate the Stanton number for flow over a tube from the following

Evaluate the Stanton number for flow over a tube from the following data /

See Answer

Q: In a sheet-metal rolling and stamping factory, a 2

In a sheet-metal rolling and stamping factory, a 2.5- mm thick strip of stainless steel is hot rolled, as is schematically depicted in the figure. The strip emerges from the furnace and the rolling mi...

See Answer

Q: A flat-plate heat exchanger operates in a nitrogen atmosphere at

A flat-plate heat exchanger operates in a nitrogen atmosphere at a pressure of about 104 N/m2 and 38°C. The flat-plate heat exchanger was originally designed to operate in air at 1 atm and 38°C turbul...

See Answer

Q: Air at 320 K with a free-stream velocity of 10

Air at 320 K with a free-stream velocity of 10 m/s is used to cool small electronic devices mounted on a printed circuit board as shown in the sketch. Each device is 5 mm * 5 mm square in planform and...

See Answer

Q: A refrigeration truck is traveling at 130 km/h on a

A refrigeration truck is traveling at 130 km/h on a desert highway where the air temperature is 50°C. The body of the truck is idealized as a rectangular box 3 m wide, 2.1 m high, and 6 m l...

See Answer

Q: At the equator, where the sun is approximately overhead at noon

At the equator, where the sun is approximately overhead at noon, a near optimum orientation for a flat-plate solar hot-water heater is in the horizontal position. Suppose a 4-m ï...

See Answer

Q: The air-conditioning system in a Chevrolet van for use in

The air-conditioning system in a Chevrolet van for use in desert climates is to be sized. The system is to maintain an interior temperature of 20°C when the van travels at 100 km/h through...

See Answer

Q: Twenty-five square computer chips, each 10 mm * 10

Twenty-five square computer chips, each 10 mm * 10 mm in size and 1 mm thick, are mounted 1 mm apart on an insulating plastic substrate as shown below. The chips are to be cooled by nitrogen flowing a...

See Answer