Questions from Principles Of Heat Transfer

Q: A pipe carrying superheated steam in a basement at 10°C

A pipe carrying superheated steam in a basement at 10°C has a surface temperature of 150°C. Heat loss from the pipe occurs by radiation and natural convection / Determ...

Q: A horizontal shell-and-tube heat exchanger is used to

A horizontal shell-and-tube heat exchanger is used to condense organic vapors. The organic vapors condense on the outside of the tubes, while water is used as the cooling medium on the inside of the t...

Q: A shell-and-tube heat exchanger is to be used

A shell-and-tube heat exchanger is to be used to cool 25.2 kg/s of water from 38°C to 32°C. The exchanger has one shell-side pass and two tube-side passes. The hot water flows through the tubes, and t...

Q: A shell-and-tube heat exchanger with the characteristics given

A shell-and-tube heat exchanger with the characteristics given below is to be used to heat 27,000 kg/h of water before it is sent to a reaction system. Saturated steam at 239 kPa absolute pressure is...

Q: Estimate the time required for nocturnal radiation to freeze a 3-

Estimate the time required for nocturnal radiation to freeze a 3-cm thickness of water with ambient air and initial water temperatures at 4oC. Neglect evaporation effects.

Q: Determine the appropriate size of a shell-and-tube heat

Determine the appropriate size of a shell-and-tube heat exchanger with two tube passes and one shell pass to heat 8.82 kg/s of pure ethanol from 15.6°C to 60°C. The heating medium is saturated steam a...

Q: Repeat Problem 10.3, but assume that fouling factors of

Repeat Problem 10.3, but assume that fouling factors of 0.0009 m2 K/W and 0.0004 m2 K/W have developed on the inside and on the outside, respectively.

Q: A counterflow regenerator is used in a gas tur- bine power

A counterflow regenerator is used in a gas tur- bine power plant to preheat the air before it enters the combustor. The air leaves the compressor at a temperature of 350°C. Exhaust gas leaves the tu...

Q: Determine the heat-transfer area requirements of Problem 10.41

Determine the heat-transfer area requirements of Problem 10.41 if (a) a 1–2 shell-and-tube, (b) an unmixed cross-flow, and (c) a parallel flow heat exchanger are used.

Q: A small space heater is constructed of 1.25 cm,

A small space heater is constructed of 1.25 cm, 18-gauge brass tubes that are 60 cm. The tubes are arranged in equilateral, staggered triangles on 3.6 cm centers with four rows of 15 tubes each. A...