Q: Steam having a quality of 98% at a pressure of 1
Steam having a quality of 98% at a pressure of 1.37 3 105 N/m2 is flowing at a velocity of 1 m/s through a steel pipe of 2.7-cm OD and 2.1-cm ID. The heat transfer coefficient at the inner surf...
See AnswerQ: Estimate the rate of heat loss per unit length from a 5
Estimate the rate of heat loss per unit length from a 5-cm ID, 6-cm OD steel pipe covered with high- temperature insulation having a thermal conductivity of 0.11 W/(m K) and a thickness of 1.2 cm. Ste...
See AnswerQ: The rate of heat flow per unit length q/L through
The rate of heat flow per unit length q/L through a hollow cylinder of inside radius ri and outside radius ro is where /Determine the per- cent error in the rate of heat flow if the arithmetic mean ar...
See AnswerQ: A small dam, which is idealized by a large slab 1
A small dam, which is idealized by a large slab 1.2 m thick, is to be completely poured in a short period of time. The hydration of the concrete results in the equivalent of a distributed source of co...
See AnswerQ: A 2.5-cm-OD, 2-cm
A 2.5-cm-OD, 2-cm-ID copper pipe carries liquid oxy- gen to the storage site of a space shuttle at 213°C and 0.04 m3/min. The ambient air is at 21oC and has a dew point of 10oC. How much in...
See AnswerQ: A shell-and-tube heat exchanger having one shell pass
A shell-and-tube heat exchanger having one shell pass and four tube passes is shown schematically in the following sketch. The fluid in the tubes enters at 200°C and leaves at 100Â&de...
See AnswerQ: A salesperson for insulation material claims that insulating exposed steam pipes in
A salesperson for insulation material claims that insulating exposed steam pipes in the basement of a large hotel will be cost-effective. Suppose saturated steam at 5.7 bar flows through a 30-cm-OD st...
See AnswerQ: A cylindrical liquid oxygen (LOX) tank has a diameter of
A cylindrical liquid oxygen (LOX) tank has a diameter of 1.22 m, a length of 6.1 m, and hemispherical ends. The boiling point of LOX is 2179.4oC. An insulation is sought that will reduce the boil-off...
See AnswerQ: The addition of insulation to a cylindrical surface such as a wire
The addition of insulation to a cylindrical surface such as a wire, may increase the rate of heat dissipation to the surroundings (see Problem 2.15). (a) For a No. 10 wire (0.26 cm in diameter), what...
See AnswerQ: A standard 10-cm steel pipe (ID = 10.
A standard 10-cm steel pipe (ID = 10.066 cm, OD = 11.25 cm) carries superheated steam at 650oC in an enclosed space where a fire hazard exists, limiting the outer surface temperature to 38oC. To minim...
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