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5. A pipe with a 2 cm diameter has R-134a flowing through it with an average...
Problem 2 Let's consider a single-stream problem with a 28-cm diameter pipe where Refrigerant R-134a flows...
Problem 2 Let's consider a single-stream problem with a 28-cm diameter pipe where Refrigerant R-134a flows steadily at 200 kPa and 20°C with a velocity of 5 m/s. The refrigerant undergoes a heating process, and leaves at 180 kPa and 40 degrees C 0 R-134a 200 kPa 20°C 5 m/s 180 kPa 40°C 10.2. A. Is this a steady-flow process? Check all that apply. □ Yes, nothing else is mentioned and we need to make this assumption to proceed with...
Question 5 Heat is to be transferred to Refrigerant 134a by flowing it through a long...
Question 5 Heat is to be transferred to Refrigerant 134a by flowing it through a long horizontal pipe at steady state. The pipe has an inner diameter of 5 cm. When refrigerant saturated vapour flows in at 20 kg/min and -6 °C, while exits at 800 kPa, the heat transfer rate to the refrigerant was found to be 3.5 kW. Assume an exit temperature in the range of 80 - 100°C and determine the percentage error between that assumed value...
Question 5 Heat is to be transferred to Refrigerant 134a by flowing it through a long...
Question 5 Heat is to be transferred to Refrigerant 134a by flowing it through a long horizontal pipe at steady state. The pipe has an inner diameter of 5 cm. When refrigerant saturated vapour flows in at 20 kg/min and -6 °C, while exits at 800 kPa, the heat transfer rate to the refrigerant was found to be 3.5 kW. Assume an exit temperature in the range of 80 - 100 °C and determine the percentage error between that assumed...
Steam enters a horizontal 14-cm-diameter pipe as a saturated vapor at 5 bar with a velocity...
Steam enters a horizontal 14-cm-diameter pipe as a saturated vapor at 5 bar with a velocity of 10 m/s and exits at 4.5 bar with a quality of 95%. Heat transfer from the pipe to the surroundings at 291K takes place at an average outer surface temperature of 400 K. For operation at steady state, determine (a) the velocity at the exit, in m/s. (b) the rate of heat transfer from the pipe, in kW.? (c) the rate of entropy...
A) Steam enters a horizontal pipe operating at steady state with a specific enthalpy of 2,663 kJ/...
A) Steam enters a horizontal pipe operating at steady state with a specific enthalpy of 2,663 kJ/kg and a mass flow rate of 0.1 kg/s. At the exit, the specific enthalpy is 1,531 kJ/kg. If there is no significant change in kinetic energy from inlet to exit, determine the rate of heat transfer between the pipe and its surroundings, in kW. B) Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 3.1 bar and a velocity of...
5.16. Water is flowing in a 3-cm-diameter pipe at an average velocity of Uav 2 m/s....
5.16. Water is flowing in a 3-cm-diameter pipe at an average velocity of Uav 2 m/s. Assuming water density of ρ-1000 kg/m 3 and viscosity μ-10-3 N s'm2, calculate the velocity at the center of the pipe, the shear τ at the wall, and the Reynolds number. Assuming laminar flow, calculate friction coefficient C and pressure drop dp/dx.
H2.3 Consider water at 20°C flowing through a horizontal pipe of diameter 15 cm and length 10 m. ...
H2.3 Consider water at 20°C flowing through a horizontal pipe of diameter 15 cm and length 10 m. The flowrate is 0.021 m3/s and the wall shear stress is 5.76 N/m2. Assume fully developed flow. a. Verify that the flow is turbulent b. Determine the pressure drop [N/m2 c. Estimate the viscous sublayer thickness [mm], i.e., where y+ 5 d. Compare results of part c. with typical pipe roughness (see Table 8.1 in text and comment on implication e. Using...
5. A horizontal cylindrical pipe has a diameter of 3 cm at point A and a...
5. A horizontal cylindrical pipe has a diameter of 3 cm at point A and a diameter of 6 cm at point B. If the velocity of water flowing at point A is 15 m/s, determine (a) the velocity of fluid flow at B, (b) the volumetric flow rate at A, (c) the mass flow rate at B
Refrigerant 134a enters a horizontal pipe operating at steady state at 50°C, 450 kPa and a...
Refrigerant 134a enters a horizontal pipe operating at steady state at 50°C, 450 kPa and a velocity of 56.9 m/s. At the exit, the temperature is 60 °C and the pressure is 220 kPa. The pipe diameter is 0.03 m. Determine the rate of heat transfer between the pipe and its surroundings, in kW
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...
Problem 2 Let's consider a single-stream problem with a 28-cm diameter pipe where Refrigerant R-134a flows steadily at 200 kPa and 20°C with a velocity of 5 m/s. The refrigerant undergoes a heating process, and leaves at 180 kPa and 40 degrees C 0 R-134a 200 kPa 20°C 5 m/s 180 kPa 40°C 10.2. A. Is this a steady-flow process? Check all that apply. □ Yes, nothing else is mentioned and we need to make this assumption to proceed with...
Question 5 Heat is to be transferred to Refrigerant 134a by flowing it through a long horizontal pipe at steady state. The pipe has an inner diameter of 5 cm. When refrigerant saturated vapour flows in at 20 kg/min and -6 °C, while exits at 800 kPa, the heat transfer rate to the refrigerant was found to be 3.5 kW. Assume an exit temperature in the range of 80 - 100°C and determine the percentage error between that assumed value...
Question 5 Heat is to be transferred to Refrigerant 134a by flowing it through a long horizontal pipe at steady state. The pipe has an inner diameter of 5 cm. When refrigerant saturated vapour flows in at 20 kg/min and -6 °C, while exits at 800 kPa, the heat transfer rate to the refrigerant was found to be 3.5 kW. Assume an exit temperature in the range of 80 - 100 °C and determine the percentage error between that assumed...
5.16. Water is flowing in a 3-cm-diameter pipe at an average velocity of Uav 2 m/s. Assuming water density of ρ-1000 kg/m 3 and viscosity μ-10-3 N s'm2, calculate the velocity at the center of the pipe, the shear τ at the wall, and the Reynolds number. Assuming laminar flow, calculate friction coefficient C and pressure drop dp/dx.
H2.3 Consider water at 20°C flowing through a horizontal pipe of diameter 15 cm and length 10 m. The flowrate is 0.021 m3/s and the wall shear stress is 5.76 N/m2. Assume fully developed flow. a. Verify that the flow is turbulent b. Determine the pressure drop [N/m2 c. Estimate the viscous sublayer thickness [mm], i.e., where y+ 5 d. Compare results of part c. with typical pipe roughness (see Table 8.1 in text and comment on implication e. Using...
5. A horizontal cylindrical pipe has a diameter of 3 cm at point A and a diameter of 6 cm at point B. If the velocity of water flowing at point A is 15 m/s, determine (a) the velocity of fluid flow at B, (b) the volumetric flow rate at A, (c) the mass flow rate at B
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