Q: Assume that the inner cylinder in Problem 7.40 is a
Assume that the inner cylinder in Problem 7.40 is a heat source consisting of an aluminum-clad rod of uranium with a 5-cm diameter and 2 m long. Estimate the heat flux that raises the temperature of t...
See AnswerQ: Evalute the rate of heat loss per meter from pressurized water flowing
Evalute the rate of heat loss per meter from pressurized water flowing at 200°C through a 10-cm-ID pipe at a velocity of 3 m/s. The pipe is covered with a 5-cm-thick layer of 85% magnesia wool with an...
See AnswerQ: In a pipe-within-a-pipe heat exchanger,
In a pipe-within-a-pipe heat exchanger, water flows in the annulus and an aniline-alcohol solution having the properties listed in Problem 7.28 flows in the central pipe. The inner pipe has a 1.3-c...
See AnswerQ: In a biomedical processing plant, a newly developed liquid drug or
In a biomedical processing plant, a newly developed liquid drug or medication that leaves a mixing chamber at 20°C needs to be heated to 70°C in a thermal curing process. This is achieved by heating t...
See AnswerQ: A plastic tube of 7.6-cm-ID and
A plastic tube of 7.6-cm-ID and 1.27-cm wall thick- ness has a thermal conductivity of 1.7 W/m K, a density of 2400 kg/m3, and a specific heat of 1675 J/kg K. It is cooled from an initial temperature...
See AnswerQ: Exhaust gases having properties similar to dry air enter an exhaust stack
Exhaust gases having properties similar to dry air enter an exhaust stack at 800 K. The stack is made of steel and is 8 m tall with a 0.5-m-ID. The gas flow rate is 0.5 kg/s, and the ambient temperatu...
See AnswerQ: A submarine is to be designed to provide a comfortable temperature of
A submarine is to be designed to provide a comfortable temperature of no less than 21°C for the crew. The submarine is idealized by a cylinder 9 m in diameter and 61 m in length, as shown....
See AnswerQ: A 3.05 m vertical cylindrical exhaust duct from a commercial
A 3.05 m vertical cylindrical exhaust duct from a commercial laundry has an ID of 15.2 cm. Exhaust gases having physical properties approximating those of dry air enter at 316°C. The duct is insulated...
See AnswerQ: A long, 1.2-m-OD pipeline carrying
A long, 1.2-m-OD pipeline carrying oil is to be installed in Alaska. To prevent the oil from becoming too viscous for pumping, the pipeline is buried 3 m below ground. The oil is also heated periodica...
See AnswerQ: Water in turbulent flow is to be heated in a single-
Water in turbulent flow is to be heated in a single-pass tubular heat exchanger by steam condensing on the outside of the tubes. The flow rate of the water, its inlet and outlet temperatures, and the...
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