Chapter 5, Problem 5.2CU

An oil pump operating at steady state delivers oil at a rate of 12 lb/s through a 1-in.-diameter exit pipe. The oil, which can be modeled as incompressible, has a density of 85 lb/ft³ and experiences a pressure rise from inlet to exit of 40 lbf/in². There is no significant elevation difference between inlet and exit, and the inlet kinetic energy is negligible. Heat transfer between the pump and its surroundings is negligible, and there is no significant change in temperature as the oil passes through the pump. Determine the velocity of the oil at the exit of the pump, in ft/s, and the power required for the pump, in hp.

Air expands through a turbine operating at steady state. At the inlet, p1 = 150 lbf/in.2, T1 = 1400°R, and at the exit, p2 = 14.8 lbf/in.2, T2 = 800°R. The mass flow rate of air entering the turbine is 5 lb/s, and 65,000 Btu/h of energy is rejected by heat transfer.Neglecting kinetic and potential energy effects, determine the power developed, in hp.

Air expands through a turbine operating at steady state. At the inlet, p₁ = 150 lbf/in.², T₁ = 1400°R, and at the exit, p2 = 14.8 lbf/in.², T2 = 800°R. The mass flow rate of air entering the turbine is 17 lb/s, and 65,000 Btu/h of energy is rejected by heat transfer. Neglecting kinetic and potential energy effects, determine the power developed, in hp. Wev = i 6396.24 hp

Air expands through a turbine operating at steady state. At the inlet, p1 = 150 lbf/in.2, T1 = 1400°R, and at the exit, p2 = 14.8 lbf/in.2, T2 = 800°R. The mass flow rate of air entering the turbine is 11 lb/s, and 65,000 Btu/h of energy is rejected by heat transfer.Neglecting kinetic and potential energy effects, determine the power developed, in hp.

Energy Balance in an Open System Steam flows at steady state through a converging, insulated nozzle, 35 cm long and with an inlet diameter of 2.5 cm. At the nozzle entrance (state 1), the temperature and pressure are 250 °C and 1000 kPa, and the velocity is 20 m/s. At the nozzle exit (state 2), the steam temperature and pressure are 700 °C and 400 kPa. Property values are H1 = 2942.59 kJ/kg                                         H2 = 3926.53 kJ/kg V1 = 0.23268 m3/kg                                         V2 = 1.12147 m3/kg What is the velocity of the steam at the nozzle exit, and what is the exit diameter?

12 thermodynamics

Air expands through a turbine operating at steady state. At the inlet, p₁ = 150 lbf/in.², T₁ = 1400°R, and at the exit, p₂ = 14.8 lbf/in.2², T₂ = 800°R. The mass flow rate of air entering the turbine is 17 lb/s, and 65,000 Btu/h of energy is rejected by heat transfer. Neglecting kinetic and potential energy effects, determine the power developed, in hp. W cv = i hp

State the difference between extensive, intensive and specific properties of a thermodynamic system.

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