Chapter 7, Problem 7.27P

An ideal reheat turbine with one stage of reheat receives steam at 8.0 MPa, 480 ̊C.Reheat pressure is 0.83 MPa and exhaust pressure is 0.007 MPa. The work is 1559kJ/kg and the thermal efficiency is 41.05%. Find the temperature of steam leaving thereheater.

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

Steam enters a turbine at 3500 kPa, 500 C and velocity of 300 m/s and exit at 15 kPa and 25 C. Heat loss is 15 kw. The mass flow rate is 10 kg/s. Find the work output.

Thermodynamics sketch and label the turbine. Sketch and label the process on a T-s diagram also mentions all numbers on the process please. Thanks 7.56 A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 400°C with velocity of 15 m/s. The exit is at 100 kPa, 150°C and very low velocity. Find the power produced and the rate of entropy generation.

a 15hp motor is used to drive an air compressor. the compressor efficiency  is 75% and the air is available at 29c . find the mass of air needed if the pressure compresses to 7times initial pressure.

A one-stage compressor takes air at 100kpa and 25C with volume flow of 0.123m3/s and discharges to 800kpa. What is the heat rejected(kw) by the intercooler?

A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 350 °C and velocity of 15 m/s. The exit is at 100 kPa, 150 °C and very low velocity (assume zero). Find the specific work (kJ/kg) and the power (kW) produced.

A two stage compressor receives 0.35 kg/s of air at 100 kPa and 269 K and delivers it at 5000 kPa. For minimum work and perfect intercooling find the amount of cooling water in the intercooler for 8oC water change of temperature.

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.