Questions from Principles Of Heat Transfer

Q: An electrical transmission line of 1.2-cm diameter carries

An electrical transmission line of 1.2-cm diameter carries a current of 200 amps and has a resistance of 3 * 10-4 ohm per meter of length. If the air around this line is at 16°C, determine the surface...

Q: Reconsider the problem described in Example 6.5, where methane

Reconsider the problem described in Example 6.5, where methane gas at 20°C flows with an upstream velocity of 10 m/s over a staggered-arrangement tube bundle, with 5 rows of tubes facing the gas flow,...

Q: Carbon dioxide gas at 1 atmosphere pressure is to be heated from

Carbon dioxide gas at 1 atmosphere pressure is to be heated from 25°C to 75°C by pumping it through a tube bank at a velocity of 4 m/s. The tubes are heated by steam condensing within them at 200°C. T...

Q: Compare the rate of heat transfer and the pressure drop for an

Compare the rate of heat transfer and the pressure drop for an in-line and a staggered arrangement of a tube bank consisting of 300 tubes that are 1.8 m long with a 2.5 cm OD. The tubes are to be arra...

Q: Consider a heat exchanger consisting of 12.5-mm-

Consider a heat exchanger consisting of 12.5-mm- OD copper tubes in a staggered arrangement with transverse spacing of 25 mm and longitudinal spacing of 30 mm with nine tubes in the longitudinal direc...

Q: A blood warmer is often used in certain clinical transfusion procedures.

A blood warmer is often used in certain clinical transfusion procedures. While safely storing and pre- serving blood requires refrigeration, cold blood when used in rapid transfusion procedures could...

Q: Estimate the heat transfer coefficient for liquid sodium at 540°C

Estimate the heat transfer coefficient for liquid sodium at 540°C flowing over a 10-row staggered-tube bank of 2.5-cm-diameter tubes arranged in an equilateral- triangular array with a 1.5 pitch-to-di...

Q: Liquid mercury at a temperature of 315°C flows at a

Liquid mercury at a temperature of 315°C flows at a velocity of 10 cm/s over a staggered bank of 5/8-in. 16 BWG stainless steel tubes arranged in an equilateral-triangular array with a pitch-to-...

Q: An attractive method of energy conservation in industrial settings is to utilize

An attractive method of energy conservation in industrial settings is to utilize waste heat from large- scale power generating equipment. In one such scheme, the exhaust gases from the diesel engine o...

Q: Repeat Problem 1.35 but assume that instead of sur-

Repeat Problem 1.35 but assume that instead of sur- face temperatures, the given temperatures are those of the air on the left and right sides of the wall and that the convection heat transfer coeffic...