7. A converging-diverging nozzle receives steam at a pressure of 380 psia with temperature of 480F and expands it to a pressure of 50 psia. Assuming the

3. (#20ppVIII-20PrM) - -The entrance and exit enthalpies of a steam turbine are 4000 and 3000 kJ/kg respectively. What is the mass of steam entering the turbine if the generator power is 3 MW and generator efficiency is 90 %.

Determine the exit pressure of steam which enters an isentropic turbine at 500°C and 2 MPa, and leaves as a saturated gas. (Give your answer in kPa to 1 decimal place).

In the compressed liquid region, the specific enthalpy is estimated by h = uf+ Pvf, where uf and vf are taken at the given temperature.True or False?

Steam enters the turbine at a speed of 10 kg/s. The pressure at the inlet is 100 bar and the temperature is 500°C. The exit exits from 1 bar to saturated steam. Calculate the power (kW) produced by this turbine in a normal state. Enthalpy H2=2675.5 kJ/kg at the outlet and enthalpy H1=3373.6 kJ/kg at the inlet.

Two vessels of equal volume are connected by a short length of pipe containing a valve. One vessel contains air and the other is completely evacuated. Calculate the change of entropy per kg of air in the system when the valve is opened and the air is allowed to fill both vessels at constant temperature.

An air compressor takes air at 99 kpa and compress it isentropically at 700 kpag. If volumeflow at discharge is 3 m3/sec, determine the capacity of air in ft 3 /min.

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QUESTION 6 Air enters a diffuser with an averaged velocity of 360 m/s at a temperature of 340 kPa and 420 K and leaves at a stagnation pressure of 300 kPa with an averaged velocity of 120 m/s and a static pressure of 285 kPa. Determine, stagnation pressure and (i) the static pressure and Mach number of the air at inlet; (ii) the diffuser efficiency (iii the Mach number at exit and the overall entropy increase

! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Steam enters a converging nozzle at 5.0 MPa and 400°C with a negligible velocity, and it exits at 3.0 MPa. It has a nozzle exit area of 50 cm². Determine the exit velocity, mass flow rate, and exit Mach number if the nozzle is isentropic. The exit velocity is m/s. kg/s. The mass flow rate is The exit Mach number is