An insulated device has two inlets and one outlet. At inlet 1, Helium enters at 184.3...
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An insulated device has two inlets and one outlet. At inlet 1, Helium enters at 184.3 psia and 725.67 "F. At inlet 2, Helium enters at 166.25 psia and 916.67 R. The mass flow rate is 10 lbm/s at each inlet. A small stirrer mixes the two streams together inside the device. The work done by the stirrer is 42.92 hp. Both the inlets are known to have a diameter of 1.5 inches while the outlet pipe diameter is unknown. The exit pressure of Helium is 312.6 psia. i) ii) What is the velocity at the inlets in m/s and in ft/s? What is the velocity at the exit in m/s? What is the exit temperature in degrees C? What is the change in entropy for the system in kW/K? v) Does this device violate the Second Law, if the surroundings are at 300 °C? iii) iv) An insulated device has two inlets and one outlet. At inlet 1, Helium enters at 184.3 psia and 725.67 "F. At inlet 2, Helium enters at 166.25 psia and 916.67 R. The mass flow rate is 10 lbm/s at each inlet. A small stirrer mixes the two streams together inside the device. The work done by the stirrer is 42.92 hp. Both the inlets are known to have a diameter of 1.5 inches while the outlet pipe diameter is unknown. The exit pressure of Helium is 312.6 psia. i) ii) What is the velocity at the inlets in m/s and in ft/s? What is the velocity at the exit in m/s? What is the exit temperature in degrees C? What is the change in entropy for the system in kW/K? v) Does this device violate the Second Law, if the surroundings are at 300 °C? iii) iv)
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Related Book For
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781119723547
7th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
Posted Date:
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