Chapter 7, Problem 7.87P

An isentropic turbine process 5kg/s of steam at 4MPa, which is exhausted at 50kPa and 100 C. Five percent pf this flow is diverted for feedwater heating at 700kPa. Find the power produced by the turbine.

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)

Steam engine with incomplete expansion receives saturated steam at 1.04 Mpa,expands it to 0.105 Mpa where release occurs. Exhaust is to a condenser at 40C.The actual engine uses 6070 kg/h of steam; it has a brake engine efficiency of 60%and a mechanical efficiency of 85%. The electric generator which it drives has anefficiency of 925. (a) For the ideal engine, find the thermal efficiency and the mep.For the actual engine, determine (b) the brake work in kW and the brake thermalefficiency, (c) the indicated work in kW, indicated thermal efficiency and indicatedsteam rate, (d) the combined thermal efficiency and the combined steam rate

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 condenser (heat exchanger) brings 1 kg/s water flow at 10 kPa quality 95% to saturated liquid at 10 kPa. The cooling is done by lake water at 20 degree Celsius that returns to the lake at 30 degree Celsius. For an insulated condenser, find the flow rate of cooling water.

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.

An adiabatic turbine has an efficiency of 90%. If air is compressed from 1100kpa and 227 degree Celsius to 101kpa. Find the work done and final temperature. Sketch process on T-S diagram.

Please be very detailed

Ao air turbine with one intet and one exit operates at Steady State, and has heat trans fer to the Surroundings at an average 3.0x' 10" J per ka of air flowing. The inlet conditions are 980°K and 400 kPa, and the exit conditions are 670°k and 100 kla. Neglect kinetic and potential energy e ffects and use the ideal gas madel without assumung constant specific heats, to calculate the entropy producHon per mass of air flowing. Pres ent your answer in kJ/ (kgʻk) wsing 5 Signifigant figures. outer surface temperature of 315°k ät the rate of