Concept explainers
An a water counter flowing heat exchanger has one line with
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
Additional Engineering Textbook Solutions
Introduction to Heat Transfer
Mechanics of Materials (10th Edition)
Statics and Mechanics of Materials (5th Edition)
DeGarmo's Materials and Processes in Manufacturing
Manufacturing Engineering & Technology
Engineering Mechanics: Statics & Dynamics (14th Edition)
- 40°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_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_forwardEx3) The compressor in a plant (see Fig. 4.9) receives carbon dioxide at 100 kPa, 280 K, with a low velocity. At the compressor discharge, the carbon dioxide exits at 1100 kPa, 500 K, with a velocity of 25 m/s, and then flows into a constant-pressure aftercooler (heat exchanger), where it is cooled down to 350 K. The power input to the compressor is 50 kW. Determine the heat transfer rate in the aftercooler. ++ Compressor -Warrow_forward
- 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.arrow_forwardLow-velocity steam with negligible kinetic energy enters a nozzle at 320°C, 3 MPa. The steam leaves the nozzle at 2 MPa with a velocity of 410 m/s. The mass flow rate is 0.37 kg/s. Find the following:a. Determine the exit state.b. Determine the exit area.arrow_forward2000 kg cast iron hoisin at 350 degree Celsius is quenched in 4000 kg of water at 15 degree Celsius. Find the amount of heat transferred to the water bath, entropy change for water and cast iron, use the entropy generation to prove that the entire system does not violate the second law of thermodynamics. Water specific heat of 4.18kj/kg.k, cast iron specific heat of 0.42kj/kg.karrow_forward
- Heat exchangers exchange only heat and not mass (fluid does not mix).The working fluid is water vapor that comes from a boiler and serves to heat cold water.Suppose that in this hypothetical application above, the water vapor enters at 500 kPa and 300 °C through the “pipe inlet” (see figure) and so is used to heat the cold water, which enters in the opposite direction through the “hull inlet” ” at 15 °C and goes to the “hull exit” exiting at 75 °C. How much steam per kg of liquid water is needed as long as the steam does not condense?arrow_forwardNitrogen at a flow rate of 0.1 kg / s enters a heat exchanger at a temperature of 450 K and 320 It comes out at K temperature. The other fluid of the heat exchanger is water, it enters at 20 ° C and leaves at 35 ° C. a) Calculate the flow of water. b) Calculate the entropy generation in this heat exchanger. (Take the average specific heating heat for nitrogen as 1.042 kJ / kgK.)arrow_forwardProblem: Steam enters a condenser tube at 300 kPa and 82% quality. It is cooled by air to 30°C and 300 kPa. The air enters the condenser's tube bundle at 100 kPa, 20°C and leaves at 95 kPa, 50°C. Heat is transferred to the surroundings at a rate of 30 kJ/s. Find the mass flow rate of steam? Air Ú3 = 10 m/s %3D P3 100 kPa Steam T3 20°C - Q=30 kJ/s P = 300 kPa %3D 82% quality P2 = 300 kPa T2 = 30°C P4 = 95 kPa T = 50°C %3!arrow_forward
- Problem 4.01. A carnot refrigerator (carnot cycle heat pump in reverse) operating between Th and Te is used to cool and freeze a bottle of water, volume V, at a temperature To < Th to freezing temperature T (known density Pw, heat capacity cw). (a) Find the work required to cool and freeze the water. (b) Find the change in entropy in the heat baths, and use it to place a limit on the change in entropy of the water (without calculating the entropy change in the water). The C.O.P. of a carnot refrigerator: KR= Qc = W Te Th-Tearrow_forward3. 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_forwardThermodynamics Air enters an insulated compressor at ambient conditions, 100 kPa, 200C at the rate of 0.2 kg/s and exits at 500 K. The isentropic efficiency of the compressor is 70%. Whatis the exit pressure? How much power is required to drive the compressor? Assume specific heats at room temperatures.arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY