Entropy Generation and Carnot Performance: Consider the diagram below of a heat pump, engine 1, that iscomposed to two internal engines: a forward heat engine, engine 2, and a smaller heat pump, engine 3. For thetemperatures and heat transfer rates given, determine:(A) The appropriate performance values for each engine: COPн,1, TH,2, and COPн,3(B) The Carnot performance values for each engine: COPH,1,CARNOT, TH,2,CARNOT, and COPH,3,CARNOT(C) The rate of entropy generation in each engine: Šgen,1, Šgen,2, and $gen,32600 K450 W2400 W190 W1000 W300 K

Answered: Image /qna-images/answer/551d2f29-46e4-4be9-afda-77175dfccf71.jpg

Answered: Entropy Generation and Carnot…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Water stored in a large, well-insulated storage tank at 21oC, and atmospheric pressure is being pumped at steady state from this tank by a pump at the rate of 40m3/h. The motor driving the pump supplies energy at the rate of 8.5 k.W. The water is used as a cooling medium and passes through a heat exchanger where 255 k.W of heat is added to the water. The heated water then flows to a second large, vented tank, which is 25 m above the first tank. Determine the final temperature of the water delivered to the second tank.
A portion of a turbojet engine is shown in the figure below. Air flowing at 25 kg/s at 240 K and 80 kPa (State 1) enters an adiabatic and reversible diffuser with a velocity of 250 m/s. It leaves the diffuser with negligible velocity (State 2). As a result, you may assume the velocity of the air leaving the diffuser is small compared to the velocity of air entering the diffuser. The air is then compressed in an adiabatic compressor with an isentropic efficiency of 80%. The compressor requires 7 MW of power (work input). You may assume air is an ideal gas with constant specific heats. Use the correct specific heats in the table below in analyzing the different processes. Air Properties Cp Cy R kJ/kgK kJ/kgK kJ/kgK Diffuser (Process 1 to 2) Compressor (Process 2 to 3) 1.003 0.716 0.287 1.014 0.727 0.287 1. Calculate the pressure of the air in kPa leaving the compressor (State 3).
Carbon dioxide gas is compressed at a steady state from a pressure of 16 lbf/in2 and a temperature of 32oF to a pressure of 50 lbf/in2 and a temperature of 130oF. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 3500 lb/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb·oR and neglect potential energy effects. A.) Determine the flow area at the inlet, in ft2, B.) and the power required by the compressor to work, in horsepower. Show complete solutions.
On a T-S diagram, the area under the process curve represents the heat transfer for internally reversible processes.
2 kg of Refrigerant-134a contained in a piston-cylinder device undergoes a reversed Carnot cycle. Some important information about the cycle is: ● At the beginning of the adiabatic compression (State 1), the refrigerant is a saturated vapor. ● The adiabatic compression ends when the temperature of the refrigerant is 30 degrees C● The refrigerant is 50% vapor by mass at the end of the isothermal heat rejection process. ● The adiabatic expansion process ends when the pressure of the refrigerant is 132.82kPaConsulting example 7-6 in your text might be helpful in understanding some aspects of this problem. a) Represent this cycle on a T-S diagram. On your diagram, clearly indicate the values of the specific entropy and temperature at every state. b) Explain (briefly) why the process curves take the shapes you indicated on your T-S diagram in part a.
Air at 1 bar, 27 °C, with a volumetric flow rate of 40 m³/min enters the non-mixing counterflow heat exchanger part of an air-conditioning system. This air exits the heat exchanger at 0.95 bar and 17 °C. The cooling of this air is done by a stream of refrigerant R-134a that enters the heat exchanger at 5 bar with a quality of 0.3 and exits at 5 bar and 20 °C. Determine the overall rate of entropy production during this process, in kW. The overall heat exchanger is insulated. The operation is steady state, and the effects of potential and kinetic energy are negligible.

Recommended textbooks for you

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

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

SEE MORE TEXTBOOKS