(a) To determine The work for the process for R-134a. The heat transfer for the process for R-134a. The sketch of the process on T - s diagram. The sketch of the process on p - v diagram. Explanation Write the expression for the heat transfer, per unit mass for the process. Q m = T ( s 2 − s 1 ) (I) Here, the heat transfer for the process is Q , the mass transfer for the process is m , the temperature for the process is T , the entropy at state 1 is s 1 and the entropy at state 2 is s 2 . Write the expression for the work transfer, per unit mass. W m = Q m + ( u 1 − u 2 ) . (II) Here, the work transfer is W , the internal energy at state 1 is u 1 and the internal energy at state 2 is u 2 . Draw the process on p - v diagram. Figure-(1) The Figure-(1) shows that the volume and pressure are varying from state 1 to state 2. Here, the kinetic and potential energy effects are negligible. Draw the process on T - s diagram. Figure-(2) The Figure-(2) shows that at constant temperature the entropy is varies from state 1 to state 2 with variable pressure. Here, the kinetic and potential energy effects are negligible. Conclusion: Refer to table A-12 “properties of superheated refrigerant 134a vapor.” to obtain the internal energy and entropy at p 1 = 2.8 bar and T = 60 ° C as 277.23 kJ / kg and 1.1079 kJ / kg ⋅ K . Refer to table A-12 “properties of superheated refrigerant 134a vapor.” to obtain the internal energy and entropy at p 2 = 14 bar and T = 60 ° C as 262.17 kJ / kg and 0.9297 kJ / kg ⋅ K . Convert the temperature from degree Celsius to Kelvin. T K = T ° C + 273 T K = 60 ° C + 273 = 333 K Substitute 333 K for T , 0 (b) To determine The work for the process for air. The heat transfer for the process for air. The sketch of the process on T - s diagram. The sketch of the process on p - v diagram.

Fundamentals of Engineering Thermodynamics

8th Edition

ISBN: 9781118832318

Author: MORAN

Publisher: WILEY

See similar textbooks

Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. T…

Videos

Question

Chapter 6.13, Problem 26P

(a)

To determine

The work for the process for R-134a.

The heat transfer for the process for R-134a.

The sketch of the process on T-s diagram.

The sketch of the process on p-v diagram.

(b)

To determine

The work for the process for air.

The heat transfer for the process for air.

The sketch of the process on T-s diagram.

The sketch of the process on p-v diagram.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 6.13, Problem 25P

Chapter 6.13, Problem 27P

Students have asked these similar questions

A continuous flow calorimeter was used to obtain the calorific value of a sample of fuel and the following data collected: Mass of fuel: 2.25 kgInlet water temperature: 11 ° COutlet water temperature 60 ° CQuantity of water: 360 Liters Calorimeter efficiency: 85%Calculate the calorific value of the sample ( kJ / kg ). ive submitted this question twice and have gotten two way different answers. looking for some help thanks

15 kg of steel ball bearings at 100 ° C is immersed in 25 kg of water at 20 ° C . Assuming no loss of heat to or from the container, calculate the final temperature of the water after equilibrium has been attained.Specific heat of steel: 0.4857 kJ / kg / ° KSpecific heat of water: 4.187 kJ / kg / ° K

Sketch and explain a PV Diagram and a Temperature Entropy Diagram for a 4 stroke diesel engine

Chapter 6 Solutions

Fundamentals of Engineering Thermodynamics

Ch. 6.13 - Prob. 1E Ch. 6.13 - Prob. 2E Ch. 6.13 - Prob. 3E Ch. 6.13 - Prob. 4E Ch. 6.13 - Prob. 5E Ch. 6.13 - 6. Is entropy produced within a system undergoing...Ch. 6.13 - 7. When a mixture of olive oil and vinegar...Ch. 6.13 - Prob. 8E Ch. 6.13 - Prob. 9E Ch. 6.13 - 10. Is Eq. 6.51a restricted to adiabatic processes...

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.

The work for the process for R-134a. The heat transfer for the process for R-134a. The sketch of the process on T - s diagram. The sketch of the process on p - v diagram.