FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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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 to a turbine at a mass flow rate of 1.4 kg/s, 700 kPa pressure and 400 °C
enters the temperature. Steam at 100 kPa pressure and 1.4 m3/kg specific volume
exits the turbine. Heat transfer from turbine to environment 50 kW, with turbine
Since the boundary temperature between the environment is 70 °C,
a) Find the power produced by the turbine, entropy produced in the turbine and isentropic efficiency of the turbine.
Note: The changes in kinetic and potential energies will be neglected and
T (K) = 273 + °C will be taken.
one kg of air is compressed in a cylinder according to the law PV^1.3= constant. If intital temperature is 100°C amd compression ratio is 15, find the work done and change in entropy of air.
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- 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.arrow_forwardA 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.arrow_forwardThere are required 2000 kW of compressor power to handle air adiabaticallyfrom 1 atmosphere, 27 oC, to 305 kPaa. The initial air velocity is 20 m/s and the finalvelocity is 85 m/s. a) If the compression is isentropic, find the compressor capacity, inm3/s. b) If the compression process is irreversible adiabatic to a temperature of 160 oC,with the capacity found in c), determine the compressor power input, in Hp.arrow_forward
- 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.arrow_forwardThe pressure and temperature entering the turbine is 1800kpaa and 380oC. The temperature leaving the turbine is 20kpa. The quality of steams entering the condenser is 90%. Find the turbine work in kJ/kg.arrow_forwardSteam 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.arrow_forward
- 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.arrow_forwardThermodynamics 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.arrow_forwardYou 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?arrow_forward
- The power of a steam turbine in a thermal power plant is 60 MW. Water vapor enters the turbine at 3MPa pressure, 4000C temperature and 50 m / s speed, 10 kPa pressure, 0.9 dry degree and 200 m / s speed leaves the turbine. Considering the turbine as adiabatic; 1-Find the mass flow of steam 2-Find the turbine outlet cross-sectional area, its ratio (A2 / A1) to the inlet cross-sectional area.arrow_forwardA 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.arrow_forwardPlease don't provide handwritten solution .....arrow_forward
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