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Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe...
a 0.4 m diameter, thin walled steel pipe is used to transport saturated steam Problem 3.049...
a 0.4 m diameter, thin walled steel pipe is used to transport
saturated steam
Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
Hot water at 80°C flows through pipe is enclosed by a thin shell with a 120...
Hot water at 80°C flows through pipe is enclosed by a thin shell with a 120 mm diameter that is maintained at a temperature of 35°C. The space between the pipe and shell is completely filled with an insulative material (kins 0.05 W/m-K). Determine a.) the rate of heat loss per unit length (W/m) if the pipe and shell are concentric and b.) the rate of heat loss per unit length (W/m) if the pipe and shell centers are offset...
Engine oil supplied through a 2-cm-diameter thin walled copper pipe (k = 385 W/kg·ºC) is to...
Engine oil supplied through a 2-cm-diameter thin walled copper pipe (k = 385 W/kg·ºC) is to be heated from 20ºC to 60ºC at a rate of 0.3 kg/s in a double-pipe heat exchanger by condensing steam at a temperature of 130ºC, which is supplied through an outer pipe with a diameter of 4 cm. If the heat exchanger is well insulated, determine the length of the heat exchanger required
Engine oil supplied through a 2cm diameter thin walled copper pipe. k-385w/kg,c is to be heated...
Engine oil supplied through a 2cm diameter thin walled copper pipe. k-385w/kg,c is to be heated from 20C to 60C at a rate of 0.3kg/s in a double-pipe heat exchanger by condensing steam at a temperature of 130C, which is supplied through an outer pope with a diameter of 2 cm. if the heat exchager is well insulated determine the length of the heat exchanger
a) what is the heat loss per unit length from the pipe in W/m? b) Estimate...
a) what is the heat loss per unit length from the pipe in
W/m?
b) Estimate the heat loss per unit length if a 50 mm thick layer
of insulation with a conductivity of 0.058 W/m K. Neglect radiation
for this part.
3. A 0.20-m diameter, thin-walled steel pipe is used to transport saturated steam at a temperature of 486K in a room for which the air temperature is 25°C and convection heat transfer coefficient at the outer surface of...
Steam in a heating system flows through a 1-m long tube whose outer diameter is DI...
Steam in a heating system flows through a 1-m long tube whose outer diameter is DI = 4 cm and whose walls are maintained at a temperature of T, = 120 °C. Circular fins (k = 46 W/m. °C) of outer diameter D2 = 8 cm and constant thickness t= 3 mm are attached to the tube, as shown in the figure. The space between the fins is 7 mm. Heat is transferred to the surrounding air at T =...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water pipe passes through a large room whose temperature is To =15°C. The pipe is insulated with an insulating material of conductivity k=0.01 W/m-°C and 1 cm thick. If the inner surface temperature of the pipe is 95 °C (at r2) and the pipe is exposed to a cross wind of 6.0 m/s, determine the rate of heat loss from the pipe (neglect radiation). Thermal...
Thin-walled aluminum tubes of diameter D = 10 mm are used in the condenser of an air conditioner....
Thin-walled aluminum tubes of diameter D = 10 mm are used in the condenser of an air conditioner. Under normal operating conditions, a convection coefficient of hi = 5000 W/m2 · K is associated with condensation on the inner surface of the tubes, while a coefficient of ho = 100 W/m2 · K is maintained by airflow over the tubes. a. What is the overall heat transfer coefficient if the tubes are unfinned? b. What is the overall heat transfer...
3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature...
3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature of the outer surface of combined heat transfer coefficient or the rate of heat loss from the steam plp generated in an natural gas furnance $0.52/therm (1 therm = 105, 0.035 W/mK) needed in order to say remain constant at 150°C. (10 marks) For a steam pipe whose outer diameter is 10 cm passes through an open space mperature of the outer surface of...
3. Hot water at an average temperature of 60°C and an average velocity of 0.6 m/s...
3. Hot water at an average temperature of 60°C and an average velocity of 0.6 m/s is flowing through a 5- m section of a thin-walled hot water pipe that has arn outer diameter of 2.5 cm. The pipe passes through the centre of a 14 cm-thick wall filled with fiberglass insulation (k-0.035 W/rm C), If the surfaces of the wall are at 18 C, determine (a) the rate of heat transfer from the pipe to the air in the...
a 0.4 m diameter, thin walled steel pipe is used to transport
saturated steam
Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
Hot water at 80°C flows through pipe is enclosed by a thin shell with a 120 mm diameter that is maintained at a temperature of 35°C. The space between the pipe and shell is completely filled with an insulative material (kins 0.05 W/m-K). Determine a.) the rate of heat loss per unit length (W/m) if the pipe and shell are concentric and b.) the rate of heat loss per unit length (W/m) if the pipe and shell centers are offset...
a) what is the heat loss per unit length from the pipe in
W/m?
b) Estimate the heat loss per unit length if a 50 mm thick layer
of insulation with a conductivity of 0.058 W/m K. Neglect radiation
for this part.
3. A 0.20-m diameter, thin-walled steel pipe is used to transport saturated steam at a temperature of 486K in a room for which the air temperature is 25°C and convection heat transfer coefficient at the outer surface of...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water pipe passes through a large room whose temperature is To =15°C. The pipe is insulated with an insulating material of conductivity k=0.01 W/m-°C and 1 cm thick. If the inner surface temperature of the pipe is 95 °C (at r2) and the pipe is exposed to a cross wind of 6.0 m/s, determine the rate of heat loss from the pipe (neglect radiation). Thermal...
3. CIN: A 50 m long section of a steam pipe at 15°C. The average temperature of the outer surface of combined heat transfer coefficient or the rate of heat loss from the steam plp generated in an natural gas furnance $0.52/therm (1 therm = 105, 0.035 W/mK) needed in order to say remain constant at 150°C. (10 marks) For a steam pipe whose outer diameter is 10 cm passes through an open space mperature of the outer surface of...
3. Hot water at an average temperature of 60°C and an average velocity of 0.6 m/s is flowing through a 5- m section of a thin-walled hot water pipe that has arn outer diameter of 2.5 cm. The pipe passes through the centre of a 14 cm-thick wall filled with fiberglass insulation (k-0.035 W/rm C), If the surfaces of the wall are at 18 C, determine (a) the rate of heat transfer from the pipe to the air in the...
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