Chapter 8, Problem 8.41P

A steam with a quality of 49%, enters an adiabatic nozzle at 3.5 MPa and leaves at 0.4 MPa and 140 oC with a flow of 7 m/s. Find the entrance velocity, in m/s.

3. Air enters a steady flow compressor at 100 kPa, 27EC and exits at 800 kPa. The process is polytropic with n = 1.3. Determine the specific work and the heat transfer in kJ/kg. Note that this is NOTan adiabatic compressor.

A 5 m3rigid tank has propane at 500 kPa, 700 K and connected by a valve to another tank of 0.7 m3with propane at 350 kPa, 600 K. The valve is opened and the two tanks come to a uniform state at 350 K. What is the final pressure?For propane R = 0.1886 kJ/kgK

i need the answer quickly

Consider Air “with constant specific heats at room temperature" enters a compressor at 100 kPa, 27°C and leaves at 520 kPa and 227 °C, the compressor experiences a heat loss of 22.3 kJ/kg to the surroundings which are at 22°C. What is the entropy generation (kJ/kg.K)?

Number 4

During an isentropic process of 3 lb/sec of air, the temperature increases from 50 deg F to 290 deg F. Find the work for a steady flow process. O-134416.8 BTU/s O-143416.8 BTU/s O-199.28 BTU/s O -172.74 BTU/s

A pressure cooker 6 litres in volume contains 5 kg of water, where the liquid is in equilibrium with the vapour above it, at 30°C. The cooker with its lid closed and weight on, is heated until the vapour produced results in an increase in pressure, and the weight just lifts up at 2 bar. i. If the flame heating the cooker is at 400°C, calculate the entropy generation due to the external irreversibility. Calculate the heat transferred in the process. ii. Assume that the heating of water is reversible; neglect heating of the cooker body; assume heat transfer to water takes place at its average temperature for the above process. Use property data given below.

Water flowing at 5 kg/s and initially at 100 kPa, 20°C is to be delivered as steam at 2000 kPa, 350°C and the same flow rate to some application. The following two-step sequential process is employed to achieve the required delivered steam conditions:Step 1 – adiabatic compression to 2000 kPa, 20°C.Step 2 – constant-pressure heating to 350°C. How much work in kJ/s is needed in Step 1 and Step 2? What is the required heat transfer in kJ/s to accomplish Step 2?