CONNECT FOR THERMODYNAMICS: AN ENGINEERI
9th Edition
ISBN: 9781260048636
Author: CENGEL
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 13.3, Problem 78P
To determine
The minimum power input required.
The minimum height to which the brackish water must be pumped.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
(iv) Consider a steady flow mixing process. Under what conditions will the energy transported
into the control volume by the incoming streams be equal to the energy transported out of
it by the outgoing stream?
Steam (H2O) enters a turbine at 35 m/s and specific enthalpy of 3500 kJ/kg. Thesteam leaves the turbine as a mixture of vapor and liquid having a velocity of 60m/s and a specific enthalpy of 2400 kJ/kg. If the flow through the turbine is steady,adiabatic, and changes in elevation are negligible, calculate the work output per unitmass (kJ/kg) for the turbine.
Under the conditions given below, design an water-cooling unit that cools 20000 kg of fruit and vegetables from 30 ° C to 5 ° C per hour. The cooling unit is in the water channel and the products cool as they pass through the water filled channel. The products are taken from one end to the water-filled channel and taken from the channel at the other. The channel width is 3 meters and the height is 90 cm. The water in the channel is recirculated continuously and cooled in the evaporator section of the cooling system. The coolant temperature in the evaporator pipes is -2 ° C. The water temperature does not fall below 1 ° C and does not rise above 6 ° C. Taking appropriate values for product density, specific heat and porosity (air volume ratio in the box); a-) water velocity in the channel and b-) Suggest suitable values for the cooling capacity of the cooling system
Chapter 13 Solutions
CONNECT FOR THERMODYNAMICS: AN ENGINEERI
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
- A process to liquify nitrogen gas (N2) from 300K, 200atm to 98.69K (saturation temperature) and 7atm is to be designed. The specific enthalpy of the saturated liquid and saturated vapor at 7atm are, Hl = 74.7 J/g and Hv = 239.2 J/g respectively. Consider combining a heat exchanger with the throttle valve. In particular, the gas cooled by throttling, but not liquefied, is used to cool the inlet gas before it enters the throttle valve. This is achieved in the arrangement with the unliqufied gas leaving the heat exchanger at 290K (stream5.) Stream 4 is still at Tsat and 7atm. Is it possible to achieve liquefaction? If so, what fraction of N2 gas is liquefied in this process? (Hint: try combining mass and energy balances on the overall process)arrow_forwardDetermine the enthalpy of steam at 127oC, at 75% quality, and flowing at the rate of 70 kg/h, if it is used to heat fluid soup. What is the volume in m3 of steam required per hour of operation?arrow_forward5. Answer the questions about the conditions of the given phase change material. (1) In refrigerant R134a, calculate the temperature and enthalpy h (kJ/kg) at a pressure of 1 MPa and a specific volume of 0.01474 m^ 3 /kg. (2) In refrigerant R134a, calculate the pressure and enthalpy (kJ/kg) at -20℃ and a specific volume of 0.1 m^ 3 /kg. (3) In a 0.1m^3 volume container, there is water with a pressure of 1 MPa and a temperature of 250℃. Find the mass of water (kg). (4) At a pressure of 0.4 MPa, 2 kg of water is contained in a 0.4 m^3 container. Find the temperature in the container and the internal negative energy (kj/kg). (5) A container with a volume of 3 m^3 contains 5 kg of water with a pressure of 200 kPa. Find the temperature and internal energy (kJ/kg). (6) 41.3g of water is contained in an 80ℓ container. When the temperature is 150 °C, find the pressure (MPa). Note: The meaning of'water' above can be either liquid, water vapor, or a mixture of liquid and water vapor.>…arrow_forward
- The equivalent evaporation (kg/hr) of a boiler producing 2000 kg/hr of steam with enthalpy content of 2426 kJ/kg from feed water at temperature 40°C (liquid enthalpy = 168 kJ/kg) is (enthalpy of vaporization of water at 100°C = 2258 KJ/kg) %3D %3Darrow_forwardPhysics Consider a tank full of gaseous propane at 25 ºC and 5 atm. The tank is accidentally damaged resulting in a 10-mm hole. Calculate the mass flow rate of propane through the hole (assume that the pressure in the tank remains at 5 atm and that the ambient is at atmospheric pressure). NB: the ratio of specific heats for propane is 1.15arrow_forwardThe normal boiling point of copper is 2845 K and its molar enthalpy of vvaporization is 300.3 kj/mol. What is the change in the entropy in the system when 127 g of copper vapor condenses to liquid at the normal boiling point? MW=63.5arrow_forward
- i need the answer quicklyarrow_forwardWastewater containing lead is being released from a certain industrial plant. The stream contains 7.74 % Pb and is treated in a unit (maximum capacity = 5000 kg wastewater/hr) that removes 90% of lead in the feed, which is then recycled back into the plant. Another stream from the unit is being released to a lagoon. If the stream leaving the plant has a rate greater than that of the treatment unit. the excess of the capacity of the unit (say, the excess above 5000 kg/hr) bypasses the unit. This excess is combined with the liquid leaving the treatment unit, which is released into the lagoon. The treatment plant releases 7500 kg/hr of wastewater. Determine the flow rate of the liquid to the waste lagoon. Include units. Express your answer in 1 decimal place only.arrow_forwardWastewater containing lead is being released from a certain industrial plant. The stream contains 3.54 % Pb and is treated in a unit (maximum capacity = 5000 kg wastewater/hr) that removes 90% of lead in the feed, which is then recycled back into the plant. Another stream from the unit is being released to a lagoon. If the stream leaving the plant has a rate greater than that of the treatment unit. the excess of the capacity of the unit (say, the excess above 5000 kg/hr) bypasses the unit. This excess is combined with the liquid leaving the treatment unit, which is released into the lagoon. The treatment plant releases 7500 kg/hr of wastewater. Determine the flow rate of the liquid to the waste lagoon.arrow_forward
- Determine the enthalpy of steam at 127C, at 75% quality, and flowing at the rate of 70 kg/h, if it isused to heat fluid soup. What is the volume in m3 of steam required per hour of operation?arrow_forwardThe stream of air and gasoline vapour,in the ratio of 14:1 by mass, enters a gasoline engine at a temperature of 30C and leaves as combustion products at a temperature of 790C. The engine has a specific fuel consumption of 0.3kg/kWh.The net heat transfer rate from the fuel-air stream to the jacket cooling water and to the surroundings is 35kW.The shaft power delivered by the engine is 26kW.Compute the increase in specific enthalpy of the fuel-air stream, assuming the changes in kinetic and potential energy to be negligible.arrow_forwardCalculate the enthalpy, volume and entropy of 2 kg of steam at a pressure of 1.9 MPa having the dryness fraction of 0.85.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Chemical and Phase Equilibrium; Author: LearnChemE;https://www.youtube.com/watch?v=SWhZkU7e8yw;License: Standard Youtube License