Water flows inside a smooth tube with a diameter of 25 mm. Its mean flow velocity...
Water flows inside a smooth tube with a diameter of 25 mm. Its mean flow velocity is 3.0 m/s. The tube is held at a temperature that is 20◦C above the water temperature. The water enters the tube at 30◦C. What is the tube length so that the water’s exit temperature is 60◦C. Please write clearly so i can read it. Also whoever keeps answering this, let someone else answer.
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Water flows inside a smooth tube with a diameter of 25 mm. Its
mean flow velocity...
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 50F enters a heat-exchanger tube having an inside diameter of 1 in. and a...
Water at 50F enters a heat-exchanger tube having an inside diameter of 1 in. and a length of 10 ft. The water flows at 20 gal/min. For a constant wall temperature of 210F, estimate the exit temperature of the water. Theproperties of water may be evaluated at the arithmetic-mean bulk temperature. The book solution uses the initial mean bulk temperature of 90 degF. How did they come up with 90 degF for the initial mean bulk temperature?
(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...
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...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6...
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Q3- A tube is painted on the inside with naphthalene and has an inside diameter of...
Q3- A tube is painted on the inside with naphthalene and has an inside diameter of 30 mm and a length of 1.10 m. Air at 31t k and an average pressure of 101.3XPa flows through this pipe at a velocity of 0.80 m/s. Assuming that the absolute pressure remains essentially constant, calculate the concentration of naphthalene 5.16 10 m/s at in the exit air. The P 75 Pa and DAn of naphthalene in air is 298 k and 101.3...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. [5-14] 2. Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5...
Water flowing at 2 kg/s through a 40-mm-diameter tube is to be heated from 25 to 75 °C by maintai...
Water flowing at 2 kg/s through a 40-mm-diameter tube is to be heated from 25 to 75 °C by maintaining the tube surface temperature at 100 °C. a) Estimate the thermal entrance length b) Assume the entrance effect is negligible and determine the required tube length.
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Water enters a 5-mm diameter and 13-m long tube at 15 °C with a velocity of...
Water enters a 5-mm diameter and 13-m long tube at 15 °C with a velocity of 0.3 m/s and leaves at 45 °C. The tube is subject to a uniform heat flux of 2000 W/m2. Assume the following properties of water: p = 996 kg/m3, Cp = 4178 J/kg.K, K = 0.615 W/m.K. u = 0.798 x 10-kg/mus. Pe=5.42. (7) What is the average convective heat transfer coefficient considering the entire length of the pipe? (a) 791 W/m2K (b) 681...
A standard oriice with diameter 25 mm is installed in a horizontal pipe having an inside diameter...
Fluid dynamics: please help!!
A standard oriice with diameter 25 mm is installed in a horizontal pipe having an inside diameter of 50 mm The pipe is to handle the steady flow of water at 20 °C. The average velocity of months of operation. It is desired to measure the pressure drop across the orifice taps by means of a simple vertical manometer. It is anticipated that the reading on the manometer scale can be obtained with a precision of...
(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...
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...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6 g/s. The water enters the tube at 40°C, and the tube surface is subjected to a constant heat flux at a rate of 1.8 kW. The tube is circular with an inner diameter of 25 mm and a length of 3 m. The maximum use temperature for ASTM B75 copper tube is 204°C. Would the surface temperature of the tube exceed the maximum use...
Q3- A tube is painted on the inside with naphthalene and has an inside diameter of 30 mm and a length of 1.10 m. Air at 31t k and an average pressure of 101.3XPa flows through this pipe at a velocity of 0.80 m/s. Assuming that the absolute pressure remains essentially constant, calculate the concentration of naphthalene 5.16 10 m/s at in the exit air. The P 75 Pa and DAn of naphthalene in air is 298 k and 101.3...
1. Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. [5-14] 2. Air enters a nozzle steadily at 50 psia, 140°F, and 150 ft/s and leaves at 14.7 psia and 900 ft/s. The heat loss from the nozzle is estimated to be 6.5...
Water flowing at 2 kg/s through a 40-mm-diameter tube is to be heated from 25 to 75 °C by maintaining the tube surface temperature at 100 °C. a) Estimate the thermal entrance length b) Assume the entrance effect is negligible and determine the required tube length.
Water flowing at 2 kg/s through a 40-mm-diameter tube is to be heated from 25 to 75 °C by maintaining the tube surface temperature at 100 °C. a) Estimate the thermal entrance length b)...
Water enters a 5-mm diameter and 13-m long tube at 15 °C with a velocity of 0.3 m/s and leaves at 45 °C. The tube is subject to a uniform heat flux of 2000 W/m2. Assume the following properties of water: p = 996 kg/m3, Cp = 4178 J/kg.K, K = 0.615 W/m.K. u = 0.798 x 10-kg/mus. Pe=5.42. (7) What is the average convective heat transfer coefficient considering the entire length of the pipe? (a) 791 W/m2K (b) 681...
Fluid dynamics: please help!!
A standard oriice with diameter 25 mm is installed in a horizontal pipe having an inside diameter of 50 mm The pipe is to handle the steady flow of water at 20 °C. The average velocity of months of operation. It is desired to measure the pressure drop across the orifice taps by means of a simple vertical manometer. It is anticipated that the reading on the manometer scale can be obtained with a precision of...
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