HomeworkLib
Question

Problem 7 A system undergoes a thermodynamic cycle consisting of four processes in series. The table below provides some data, where the familiar sign convention for first-law analysis is adopted. The system is a closed system. Kinetic energy and potential energy effects can be neglected. a. Using first-law analysis and the energy balance for a cycle, find the missing values in the table. b. Determine whether the cycle is a power cycle or refrigeration cycle. c.Show that the net amount of energy transfer by heat, for the cycle, is equal to the net amount of energy transfer by work, for the cycle. Process AUkJ KJ WkJ 1-2 2-3 3-4 4-1 600 -600 1300 700 0 500 700

engineering   Mechanical-Engineering   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Process :- 1-2 - Process- 3- 500-700 = △u By using Fi γ s t Low of thermodynamics en d state a*e

0 0
Add a comment
Know the answer?
Add Answer to:
Problem 7 A system undergoes a thermodynamic cycle consisting of four processes in series. The table...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes: Process 1-2:...

    A gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes: Process 1-2: Constant volume V1 = 2 m3, p1 = 1 bar, to p2 = 3 bar, U2 – U1 = 400 kJ. Process 2-3: Constant pressure compression to V3 = 1 m3. Process 3-1: Adiabatic expansion, with W31 = 150 kJ. There are no significant changes in kinetic or potential energy. Determine the net work for the cycle, in kJ, and the heat transfers for...

  • A system consisting of 1.0 kg of water and undergoes a thermodynamic power cycle composed of...

    A system consisting of 1.0 kg of water and undergoes a thermodynamic power cycle composed of the following four processes: Process 1 – 2: Constant pressure heating at 1 MPa from saturated vapor Process 2 – 3: Constant volume cooling to pz = 500 kPa, Tz = 160°C Process 3 – 4: Isothermal compression with Q34 = -815.8 kJ Process 4-1: Constant volume heating (a) Sketch the cycle on T - v and p - v diagrams. (b) Is this...

  • A gas undergoes a thermodynamic cycle consisting of three processes:

    A gas undergoes a thermodynamic cycle consisting of three processes:Compression occurs in Process 1-2 with pV= constant. P₁=10⁵ Pa, V₁=1.5 m³, and V₂=0.4 m³. U₂-U₁=0Process 2-3 is isobaric.Process 3-1 is isochoric. U₃-U1=-3259 kJa. Sketch the cycle on a p-V diagram.b. Calculate the heat transfer for Process 3-1.c. Calculate the work for process 2-3.

  • A piston-cylinder assembly undergoes a cycle consisting of the following three processes:

    A piston-cylinder assembly undergoes a cycle consisting of the following three processes: • Process 1-2: Compression with constant internal energy • Process 2-3: Constant-volume cooling to p3 = 100 kPa, V3 = 0.1 m3 • Process 3-1: Constant-pressure expansion with W31 = 12 kJ Sketch the cycle on a p-V diagram, labeling each of the states and indicating the process directions with arrows. If the work for the entire cycle is Wcycle = -20 kJ and changes in kinetic and potential energy are negligible,...

  • A gas undergoes a cycle in a piston-cylinder assembly consisting of the following three processes:

    A gas undergoes a cycle in a piston-cylinder assembly consisting of the following three processes:Process 1-2: Constant pressure, p=1.4 bar, v₁=0.028 m³, w12=10 kJProcess 2-3: Compression with p V= constant, U₃=U₂Process 3-1: Constant volume, U₁-U₃=-25 kJThere are no significant changes in kinetic or potential energy.(a) Calculate the net work for the cycle, in kJ.(b) Calculate the heat transfer for process 1-2, in kJ.

  • QUESTION 7 A piston-cylinder assembly contains 6kg of water that undergoes a series of processes to...

    QUESTION 7 A piston-cylinder assembly contains 6kg of water that undergoes a series of processes to form a thermodynamic cycle. Process 1->2: Constant volume cooling from P:-3.0bar to p1.5bar and X-0.728 to Process 2-->3: Constant pressure expansion Process 3-1: Polytropic compression with pv2 constant to the initial state Kinetic and potential energy effects are negligible. To help organize given information and fix states 1 and 3, consider sketching a Pv diagram Evaluate the net heat transfer for the cycle in...

  • 1. (a) ( For a power cycle, the heat transfers are Qin 60 kJ and Qout...

    (a)  (i) For a power cycle, the heat transfers are Qin=60 kJ and Qout=40 kJ. Determine the net work, in kJ, and the thermal efficiency.  (ii) A refrigeration cycle operates with a coefficient of performance β=1.5. For the cycle, Qout=500 kJ. Determine Qin and Wcyele each in kJ.(b) A gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes:Process 1-2: Compression with p V= constant, from p₁=1 bar, V₁=1.6 m³ to V₂=0.2 m³, U₂-U₁=0.Process 2-3: Constant pressure to...

  • Thermodynamics 2.56 A gas within a piston-cylinder assembly undergoes a thermo- dynamic cycle consisting of three...

    Thermodynamics 2.56 A gas within a piston-cylinder assembly undergoes a thermo- dynamic cycle consisting of three processes: Process 1-2: Constant volume V1 m, pi bar, to p2 3 bar, U2- U400 kJ Process 2-3: Constant pressure expansion to V 2 m3 Process 3-1: Adiabatic compression, with W1120 kJ There are no significant changes in kinetic or potential energy. De- termine the net work for the cycle, in kJ, and the heat transfers for Processes 1-2 and 2-3, in kJ. Is...

  • Please show solutions to part (b), (c), and (d). Thank you. A system consisting of 1.0...

    Please show solutions to part (b), (c), and (d). Thank you. A system consisting of 1.0 kg of water and undergoes a thermodynamic power cycle composed of the following four processes: Process 1 – 2: Constant pressure heating at 1 MPa from saturated vapor Process 2 – 3: Constant volume cooling to p3 = 500 kPa, T3 = 160°C Process 3 – 4: Isothermal compression with Q34 = -815.8 kJ Process 4 – 1: Constant volume heating (a) Sketch the...

  • Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is...

    Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is at 400 kPa and 300 K with a volume of 0.3 m3. Air is first expanded isothermally to 150 kPa, then compressed adiabatically to the initial pressure, and finally compressed at the constant pressure to the initial state. Accounting for the variation of specific heats with temperature, determine the work and heat transfer for each process.

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT