Chapter 7, Problem 7.151EP

3. An adiabatic compressor takes argon from 100 kPa, 300 K to 2000 kPa. The compressor efficiency is 80%. (a) Find the outlet temperature (K) and the work (kJ/kg) (b) Find the entropy generation (kJ/kg-K)

A steam is expanded through a nozzle and the enthalphy drop per kg of steam from the initial pressure to the final pressure is 70 kJ. Neglecting the friction, find the velocity of discharge.

Do not give answer in image and hand writing

2.A steam throttling valve with inlet conditions of 2MPA and 400C is connected to the inlet of the turbine. The turbine has 200kW power output and heat abstracted of 100kW. If the mass flow rate is 1kg/s and the exit temperature of steam is 300C, find the exit turbine pressure.

A refrigeration system has a COP of 4.The compressor power is 30 kw.Find the mass of ice produced by the system in 16 hrs from 30C to ice at-6 C.if miscellaneous losses is 35%.

You have a nozzle with steam inlet at 350 deg C, 0.85 MPa and 12m/s. The stream exits at 0.4 MPa and 250 m/s. If stream 1 area is 750cm2, what is exit stream area and temperature?

In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.01 bar), and the cooling tower cools the water to (T=12 "C). Assume turbine exhaust at (86%) quality.

The turbine section in a jet engine receives gas (assume air) at 1200 K, 800 kPa with an ambient atmosphere at 80 kPa. The turbine is followed by a nozzle open to the atmosphere and all the turbine work drives a compressor receiving air at 85 kPa, 270 K with the same flow rate. Find the turbine exit pressure P₂ so the nozzle has an exit velocity of 800 m/s.

A steam turbine has an inlet of 4 kg/s water at 1000 kPa, 400 oC and velocity of 77 m/s. The exit is at 100 kPa, 150 oC and very low velocity. Find the specific work and the power produced.