Thermodynamics: An Engineering Approach
9th Edition
ISBN: 9781259822674
Author: Yunus A. Cengel Dr., Michael A. Boles
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 13.3, Problem 82P
Fresh water is obtained from seawater at a rate of 1.5 m3/s by a desalination plant that consumes 11.5 MW of power and has a second-law efficiency of 20 percent. Determine the power that can be produced if the fresh water produced is mixed with the seawater reversibly.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Steam at a rate of 200 kg/min enters a turbine at 350°C and 40 bar through a 7.5-cm
internal diameter pipe. The turbine operation is adiabatic, and the effluent leaves as
saturated water at 5 bar through a 5-cm diameter pipe.
1. Calculate the work produced by the turbine in kW.
2. What is the enthalpyand phase of the effluent stream?
21 If it leaves the turbine at 75C and 5 bar
22 If it leaves the turbine at 30C and 5 bar
7.5
In a food processing industry, steam and water are mixed to produce a continuous supply of hot water. 13 kg/sec of water with a specific enthalpy of 50 kJ/kg and 2 kg/sec of steam with a specific enthalpy of 2670 kJ/kg flow into a mixing chamber. If the heat loss from the chamber is 780 watts, determine the specific enthalpy of the hot water produced.
A steam turbine of a local power plant is supplied with steam of 1.5 MPa and (40x9) °C from the boiler and the
condensate exits the turbine as saturated vapor at (5x9) °C. Determine the rate at which heat is lost to the surrounding
from the turbine if the mass flow rate of the steam is 19 kg/s and the turbine produces 12 MW of power. Neglect both
potential and kinetic energy.
Answer:
Chapter 13 Solutions
Thermodynamics: An Engineering Approach
Ch. 13.3 - What are mass and mole fractions?Ch. 13.3 - Consider a mixture of several gases of identical...Ch. 13.3 - The sum of the mole fractions for an ideal-gas...Ch. 13.3 - Somebody claims that the mass and mole fractions...Ch. 13.3 - Consider a mixture of two gases. Can the apparent...Ch. 13.3 - What is the apparent molar mass for a gas mixture?...Ch. 13.3 - Prob. 7PCh. 13.3 - The composition of moist air is given on a molar...Ch. 13.3 - Prob. 9PCh. 13.3 - Prob. 10P
Ch. 13.3 - A gas mixture consists of 20 percent O2, 30...Ch. 13.3 - Prob. 12PCh. 13.3 - Prob. 13PCh. 13.3 - Consider a mixture of two gases A and B. Show that...Ch. 13.3 - Is a mixture of ideal gases also an ideal gas?...Ch. 13.3 - Express Daltons law of additive pressures. Does...Ch. 13.3 - Express Amagats law of additive volumes. Does this...Ch. 13.3 - Prob. 18PCh. 13.3 - How is the P-v-T behavior of a component in an...Ch. 13.3 - Prob. 20PCh. 13.3 - Prob. 21PCh. 13.3 - Prob. 22PCh. 13.3 - Consider a rigid tank that contains a mixture of...Ch. 13.3 - Prob. 24PCh. 13.3 - Is this statement correct? The temperature of an...Ch. 13.3 - Is this statement correct? The volume of an...Ch. 13.3 - Is this statement correct? The pressure of an...Ch. 13.3 - A gas mixture at 300 K and 200 kPa consists of 1...Ch. 13.3 - Prob. 29PCh. 13.3 - Separation units often use membranes, absorbers,...Ch. 13.3 - Prob. 31PCh. 13.3 - The mass fractions of a mixture of gases are 15...Ch. 13.3 - The volumetric analysis of a mixture of gases is...Ch. 13.3 - An engineer has proposed mixing extra oxygen with...Ch. 13.3 - A rigid tank contains 0.5 kmol of Ar and 2 kmol of...Ch. 13.3 - A mixture of gases consists of 0.9 kg of oxygen,...Ch. 13.3 - Prob. 37PCh. 13.3 - One pound-mass of a gas whose density is 0.001...Ch. 13.3 - A 30 percent (by mass) ethane and 70 percent...Ch. 13.3 - Prob. 40PCh. 13.3 - Prob. 41PCh. 13.3 - A rigid tank that contains 2 kg of N2 at 25C and...Ch. 13.3 - Prob. 43PCh. 13.3 - Prob. 44PCh. 13.3 - Prob. 45PCh. 13.3 - Is the total internal energy of an ideal-gas...Ch. 13.3 - Prob. 47PCh. 13.3 - Prob. 48PCh. 13.3 - Prob. 49PCh. 13.3 - Prob. 50PCh. 13.3 - The volumetric analysis of a mixture of gases is...Ch. 13.3 - A mixture of nitrogen and carbon dioxide has a...Ch. 13.3 - The mass fractions of a mixture of gases are 15...Ch. 13.3 - A mixture of gases consists of 0.1 kg of oxygen, 1...Ch. 13.3 - An insulated tank that contains 1 kg of O2at 15C...Ch. 13.3 - An insulated rigid tank is divided into two...Ch. 13.3 - Prob. 59PCh. 13.3 - A mixture of 65 percent N2 and 35 percent CO2...Ch. 13.3 - Prob. 62PCh. 13.3 - Prob. 63PCh. 13.3 - Prob. 66PCh. 13.3 - Prob. 67PCh. 13.3 - Prob. 68PCh. 13.3 - Prob. 69PCh. 13.3 - The gas passing through the turbine of a simple...Ch. 13.3 - Prob. 71PCh. 13.3 - A pistoncylinder device contains 6 kg of H2 and 21...Ch. 13.3 - Prob. 73PCh. 13.3 - Prob. 74PCh. 13.3 - Prob. 75PCh. 13.3 - Prob. 76PCh. 13.3 - Prob. 77PCh. 13.3 - Prob. 78PCh. 13.3 - Prob. 79PCh. 13.3 - Prob. 81PCh. 13.3 - Fresh water is obtained from seawater at a rate of...Ch. 13.3 - Is it possible for an adiabatic liquid-vapor...Ch. 13.3 - Prob. 84PCh. 13.3 - Prob. 85RPCh. 13.3 - The products of combustion of a hydrocarbon fuel...Ch. 13.3 - A mixture of gases is assembled by first filling...Ch. 13.3 - Prob. 90RPCh. 13.3 - Prob. 91RPCh. 13.3 - Prob. 92RPCh. 13.3 - A rigid tank contains a mixture of 4 kg of He and...Ch. 13.3 - A spring-loaded pistoncylinder device contains a...Ch. 13.3 - Prob. 95RPCh. 13.3 - Reconsider Prob. 1395. Calculate the total work...Ch. 13.3 - Prob. 97RPCh. 13.3 - Prob. 100RPCh. 13.3 - Prob. 101RPCh. 13.3 - Prob. 102FEPCh. 13.3 - An ideal-gas mixture whose apparent molar mass is...Ch. 13.3 - An ideal-gas mixture consists of 2 kmol of N2and 4...Ch. 13.3 - Prob. 105FEPCh. 13.3 - Prob. 106FEPCh. 13.3 - An ideal-gas mixture consists of 3 kg of Ar and 6...Ch. 13.3 - Prob. 108FEPCh. 13.3 - Prob. 109FEPCh. 13.3 - Prob. 110FEPCh. 13.3 - Prob. 111FEP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 1. Steam at a pressure of 2MPA and temperature 300°C is passed at a constant rate into a desuperheater unit. The desuperheater is accomplished by continuously spraying water at 95 °C onto incoming superheated steam. The amount of water injected is so regulated that both the water and superheated steam finally change into dry steam at 2 MPa. If the resulting mixture of dry saturated steam leaves the desuperheater at 2MPA and the rate of I kg/s, find the mass of superheated steam used per hour and the mass of water to be injected per hour. Fond also the diameter of the pipe through which the superheated steam flows to the superheater if the speed of the steam through the pipe is not to exceed 25m/s..arrow_forwardSuperheated steam at a pressure of 40 bar and a temperature of 500 0C enters a steam turbine. The exhaust steam leaves the turbine at a pressure of 0.2 bar with a dryness fraction of 0.85. If the steam flow rate is 150,000 kg/hr and the rate of heat loss from the turbine is 800 kW, find the power developed by the turbine. Also determine the volume flow rate of steam at inlet to and exit from the turbine. (Hint: 1 bar = 100 kPa , dryness fraction = quality of steam)arrow_forwardOne mole of carbon dioxide is to be compressed adiabatically from 1 bar and 25⁰C to 10 bar. Because of irreversibilities and poor design of the compressor, the compressor work required is found to be 25 % greater than that in a well-designed (reversible) compressor. Compute the outlet temperature of the carbon dioxide and the work that must be supplied to the compressor for both the reversible and irreversible compressors. Assume carbon dioxide is an ideal gas with the constant-pressure heat capacity (in J/mol.K) given below. (Please write assumptions) ??(?) = 22.243 + 5.977 ∗ 10^-2∗ ? − 3.499 ∗ 10^-5∗ ?2 + 7.464 ∗ 10^-9∗ ?3arrow_forward
- One mole of carbon dioxide is to be compressed adiabatically from 1 bar and 25⁰C to 10 bar. Because of irreversibilities and poor design of the compressor, the compressor work required is found to be 25 % greater than that in a well-designed (reversible) compressor. Compute the outlet temperature of the carbon dioxide and the work that must be supplied to the compressor for both the reversible and irreversible compressors. Assume carbon dioxide is an ideal gas with the constant-pressure heat capacity (in J/mol.K) given below. (Please write assumptions) (Hint: You can either use Matlab or Octave to solve for T numerically or you can use a trial-error procedure.)arrow_forwardSteam enters the condenser of a steam power plant at 30 kPa, a quality of 91 % and a mass flow rate (m) of 337 kg/min . It leaves the condenser as saturated liquid at 30 kPa. It is to be cooled with water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to be heated to a temperature above 5 °C. Part A Determine the mass flow rate (m) of the cooling water. Express your answer to the nearest integer. TVO A£o I vec ? kg/min Submit Request Answer Part B Determine the entropy generation rate (Sgen) in the heat exchanger. Express your answer to three significant figures. Πνα ΑΣφ vec kW/K Submit Request Answerarrow_forwardIn a natural gas liquefaction plant, the liquefied natural gas (LNG) enters a cryogenic turbine at 30 bar and –160°C at a rate of 20 kg/s and leaves at 3 bar. If 115 kW power is produced by the turbine, determine the efficiency of the turbine. Take the density of LNG to be 423.8 kg/m3.arrow_forward
- The work required to compress a gas reversibly according to pV30 = C is 67.79 kJ if there is no flow. Determine the and Q if the gas is (a) air, and (b) methane.arrow_forwardSaturated water at 36.6°C passes through a throttling valve and becomes a mixture of water and steam at 5.4°C. Calculate the specific volume and specific enthalpy of the mixture. Show detailed steps of how the properties are obtained by using only the Saturated Water and Steam table. Consider that a throttling process is a typical irreversible process. The specific enthalpies of the working fluid before and after a throttling valve are the same. The steam table has been provided in the imagearrow_forwardA fluid at a pressure of 300 KPa and with specific volume of 0.18 m3 contained in kg a cylinder behind a piston expands reversibly to a pressure of 60 KPa according to a law P =, where C is constant. Calculate the work done by the fluid on the KJ piston in kgarrow_forward
- Water vapor with a flow rate of 20000 kg / h enters the condenser of a power plant at a pressure of 20 kPa and a dryness degree of 95 percent. In the condenser, there is heat transfer to the river water flowing through the pipes. The temperature rise of the river water is limited to 10 C to prevent thermal pollution. Since the state of the water at the condenser outlet is saturated liquid at 20 kPa pressure, what should be the flow rate of the cooling water.arrow_forward6. A closed gaseous system undergoes a reversible process in which 28 BTU of heat are rejected and the volume changes from 5 cu.ft. to 20 cu.ft. The pressure is constant at 20 psia. Determine the change in internal energy of the system in BTU. (Use 1 BTU = 778 ft- lb) 83.53 -27.53 -83.53arrow_forwardSteam enters an isentropic turbine at 4 MPa. X percent (by mass) of the steam exits the turbine at 100 kPa and 150degrees C, while the rest of the steam is diverted from the turbine at 600 kPa and used to heat water that is delivered to a local municipality. If the specific work output of the turbine is 1060 kJ/kg of steam entering the turbine, determine the percentages X and Y.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Thermodynamic Availability, What is?; Author: MechanicaLEi;https://www.youtube.com/watch?v=-04oxjgS99w;License: Standard Youtube License