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Water flowing at 2 kg/s through a 40-mm-diameter tube is to be heated from 25 to 75 °C by maintai...
Engine oil is heated by flowing through a circular tube of diameter D = 50 mm...
Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m and whose surface is maintained at 150 oC. The flow rate and inlet temperature of the oil are 0.5 kg/s and 20 oC. a. Estimate the outlet temperature Tm,o. B. Average Nusselt number C. Estimate the total heat transfer rate q for the tube.
water flowing through a smooth pipe of inner diameter di = 25 mm is heated at...
water flowing through a smooth pipe of inner diameter di = 25 mm is heated at the rate from 30 c to 50 c. the mass flow rate is of 1 kg/s. the wall temperature of the pipe is measured to be 9.1 c above the average fluid temperature all along its length. a. what is the length of the tube required for heating? b. what are the values of the heat flux and the temperature of the wall at...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diame...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diameter D, = 20 mm and an outer tube of diameter Do-80 mm. Saturated steam flows through the inner tube, maintaining its surface at uniform temperature of T,i 100°C, while the outer surface of the outer tube is well insulated. If fully developed conditions may be assumed throughout the annulus, how long must the system be to provide an outlet...
(40 points) Engine oil flows at a rate of 1 kg/s through a 5-mm diameter smooth straight tube. Th...
(40 points) Engine oil flows at a rate of 1 kg/s through a 5-mm diameter smooth straight tube. The oil has an inlet temperature of 47°C and it is desired to heat the oil to a mean temperature of 87°C at the exit of the tube. The surface of the tube is maintained at 150°C. Assuming the flow is fully developed both hydrodynamically and thermally, determine the required length of the tube. Note: by calculating Reynolds number at the entrance...
Q4 04(12%) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tub...
Q4
04(12%) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady op eration all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of...
An organic liquid is heated from 20°C to 40°C by hot water in a 1:1 pass...
An organic liquid is heated from 20°C to 40°C by hot water in a 1:1 pass shell-and- tube heat exchanger in counter-current flow. The inlet temperature of the water stream is 85oC and flows in the shell side. The organic liquid flows through a bundle of 200 tubes of outside diameter 21 mm with a wall thickness of 2 mm. The flows of the organic liquid and water are 40 kg s and 15 kg s1, respectively (a) Calculate the...
8.12 Dry, compressed air at Tm,i 75°C, p- 1o atm, with a mass flow rate of a 30-mm-diameter, 5-m-...
part b only please8.12 Dry, compressed air at Tm,i 75°C, p- 1o atm, with a mass flow rate of a 30-mm-diameter, 5-m-long tube whose surface is at T, 25°C. 0.001 kg/s, enters (a) Determine the thermal entry length, the mean temperature of the air at the tube outlet, the rate of heat transfer from the air to the tube wall, and the power required to flow the air through the tube. For these conditions the fully developed heat transfer coefficient is...
Water is to be heated from 20 ℃ to 40 ℃ as it flows through a...
Water is to be heated from 20 ℃ to 40 ℃ as it flows through a 1-cm diameter. The tube is kept at Ts=60 ℃ on the surface. Assume there’s no energy loss to the environment. If the system is requried to provide hot water at 1L/min. Determine the rate of heat transfer. Determine the length of the pipe. Assume turbulent flow if Reynolds number is larger than 2100 (this problem should have turbulent flow)
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m...
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m at a mass flowrate of 0.3 kg/s. The water enters the pipe at a mean temperature Tm,i= 80 °C and exits at Tm,o= 80 °C while the pipe surface temperature is maintained at Ts= 20 °C along its entire length. a. Is the flow turbulent or laminar? b. Calculate the average convection heat transfer coefficient inside the tube. c. Calculate the length of the...
SME 4463/SKMM 3443 Q3. (a) Water is heated from 15oC to 75°C as it flows through...
SME 4463/SKMM 3443 Q3. (a) Water is heated from 15oC to 75°C as it flows through a 2.5-cm-internal-diameter, 15-m long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady state operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a...
Water at m = 0.025 kg/s and Zn,i = 20°C enters an annular region formed by an inner tube of diameter D, = 20 mm and an outer tube of diameter Do-80 mm. Saturated steam flows through the inner tube, maintaining its surface at uniform temperature of T,i 100°C, while the outer surface of the outer tube is well insulated. If fully developed conditions may be assumed throughout the annulus, how long must the system be to provide an outlet...
(40 points) Engine oil flows at a rate of 1 kg/s through a 5-mm diameter smooth straight tube. The oil has an inlet temperature of 47°C and it is desired to heat the oil to a mean temperature of 87°C at the exit of the tube. The surface of the tube is maintained at 150°C. Assuming the flow is fully developed both hydrodynamically and thermally, determine the required length of the tube. Note: by calculating Reynolds number at the entrance...
Q4
04(12%) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady op eration all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of...
An organic liquid is heated from 20°C to 40°C by hot water in a 1:1 pass shell-and- tube heat exchanger in counter-current flow. The inlet temperature of the water stream is 85oC and flows in the shell side. The organic liquid flows through a bundle of 200 tubes of outside diameter 21 mm with a wall thickness of 2 mm. The flows of the organic liquid and water are 40 kg s and 15 kg s1, respectively (a) Calculate the...
part b only please8.12 Dry, compressed air at Tm,i 75°C, p- 1o atm, with a mass flow rate of a 30-mm-diameter, 5-m-long tube whose surface is at T, 25°C. 0.001 kg/s, enters (a) Determine the thermal entry length, the mean temperature of the air at the tube outlet, the rate of heat transfer from the air to the tube wall, and the power required to flow the air through the tube. For these conditions the fully developed heat transfer coefficient is...
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m at a mass flowrate of 0.3 kg/s. The water enters the pipe at a mean temperature Tm,i= 80 °C and exits at Tm,o= 80 °C while the pipe surface temperature is maintained at Ts= 20 °C along its entire length. a. Is the flow turbulent or laminar? b. Calculate the average convection heat transfer coefficient inside the tube. c. Calculate the length of the...
SME 4463/SKMM 3443 Q3. (a) Water is heated from 15oC to 75°C as it flows through a 2.5-cm-internal-diameter, 15-m long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady state operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a...
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