FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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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.
A turbine, operating under steady- flow conditions, reccives 1000 kg/min of stcam. At the inlet, the pressure is 30 bar, the temperature is 400°C, the velocity At the exit, the pressure is 0.7 bar, the quality is (100%), and the velocity is 100 m/s. If the turbine produced a power output of 9300 KW. By using the energy balance of open system with sutable tables, answer the following: (a) What are the main assumptions ? (b) Calculate dh, AKe ? (c) Calculate the rate of heat transfer between the turbine and surroundings, in kW.
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- heat engine used a steam as working fluid has 3 kg/s and initial the steam undergoes to expansion process is 8 bar, dryness fraction ( 65) percent , and the expansion follows the law (PV¹.¹-C), down to a pressure of 0.3 bar. Calculate the change of entropy of steam during the process.arrow_forward2. If 0.17 kg/s of air are compressed isothermally from Pi = 96 kPaa and V, = 0.13 m/s to p2 = 620 kPaa, find the work, the change of entropy, and heat for: a) a nonflow process, and b) a steady flow process with V1 = 15 m/s and V2 = 60 %3D %3D m/s.arrow_forward200Kg/min superheated steam at 40 bar and 350C enters a turbine through a 7.5cm ID pipe. It exits at 5bar as saturated steam through a 5cm ID pipe neglect the change in potential energy of the system. What is the temperature of the outlet saturated system? How much energy is transferred to or from the turbine?arrow_forward
- Give me right solution.. Urgent pleasearrow_forward7. If 10 kg/min of air are compressed isothermally from = 96 kPa and V, = 7.65 m/min to p, = 620 kPa, find the work, the change of entropy and the heat for (a) nonflow process and b) a steady flow process with v, = 15 m/s and v, = 60 m/s. Ans. (a)-1370KJ/min,-5.356 kJ/K.min; (b)-1386.9kJ, %3D minarrow_forwardan air flow is brought from 20 degree celsius, 100 kPa to 1000 kPa, 330 degree celsius by an adiabatic compressor driven by 50 kW motor. what are the mass flow rate and the exit volume flow rate of air?arrow_forward
- 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)arrow_forwardThe 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_forwardSolve it correctly and fast please.arrow_forward
- The subject is Thermodynamics 1 Processes of Ideal Gasesarrow_forwardThe power required for the compressor, to handle air adiabatically from 101.325kPaa and 300 °K to 305 kPaa, 2550 Hp. The inlet velocity is 21 m/s and the dischargevelocity of air is 85 m/s. a) If the process is isentropic, find the volume of air handles,in lps, measured at inlet conditions. b) If the compression is irreversible adiabatic totemperature 157.5 °C, with the capacity obtained in a), find the power input.arrow_forward40°C 4. A mixing chamber receives 5 kg/min of ammonia as saturated liquid at -20°C from one line (1) and ammonia at 40°C, 250 kPa from another line (2). The chamber also receives 325 kJ/min of energy as heat transferred from a 40°C reservoir as shown in figure. At the outlet, ammonia leaves as saturated vapor at -20°C. Find the mass flow rate in second line and calculate the total entropy generation in the process. Is this process possible?arrow_forward
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