Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
The operating conditions at the beginning of compression in an air-standard Diesel cycle are: P, 200 kPa, TI = 380 K. The compression ratio is VI/V2 = 20 and the maximum temperature is T3 = 1879.5 K. Neglect kinetic and potential energy variations and conside a steady state operation for all processes. %3D %3D (a) Plot the PV diagram. Determine (b) the temperatures T2 & T4, in K (Note: V/Vy T:/T). (c) the thermal efficiency of the Diesel cycle.

The operating conditions at the beginning of compression in an air-standard Diesel cycle are: P, 200 kPa, TI = 380 K. The compression ratio is VI/V2 = 20 and the maximum temperature is T3 = 1879.5 K. Neglect kinetic and potential energy variations and conside a steady state operation for all processes. %3D %3D (a) Plot the PV diagram. Determine (b) the temperatures T2 & T4, in K (Note: V/Vy T:/T). (c) the thermal efficiency of the Diesel cycle.

Elements Of Electromagnetics
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
icon
Related questions
Question
100%

please sollve from this way

The operating conditions at the beginning of compression in an air-standard Diesel cycle are: P, = 200 kPa, T, = 380 K. The compression ratio is Vi/V2 = 20 and the maximum %3D temperature is T3 = 1879.5 K. Neglect kinetic and potential energy variations and consider a steady state operation for all processes. (a) Plot the PV diagram. Determine (b) the temperatures T2 & T4, in K (Note: V/Vy=T;/Ty). (c) the thermal efficiency of the Diesel cycle.
Transcribed Image Text:The operating conditions at the beginning of compression in an air-standard Diesel cycle are: P, = 200 kPa, T, = 380 K. The compression ratio is Vi/V2 = 20 and the maximum %3D temperature is T3 = 1879.5 K. Neglect kinetic and potential energy variations and consider a steady state operation for all processes. (a) Plot the PV diagram. Determine (b) the temperatures T2 & T4, in K (Note: V/Vy=T;/Ty). (c) the thermal efficiency of the Diesel cycle.
Analysis: (a) The analysis begins by determining properties at each principal state of the cycle. With T = 300 K, Table A-22 gives u, = 214.07 kJ/kg and v, = 621.2. For the isentropic compression process 1-2 %3D V2 U2 = 621.2 %3D 34.51 %3D %3D 18 Interpolating in Table A-22, we get T = 898.3 K and h, = 930.98 kJ/kg. With the ideal gas equation of state %3D %3D T V P: = P = (0.1)| = (0.1) 898.3 (18) 5.39 MPa %3D %3D 300 The pressure at state 2 can be evaluated altematively using the isentropic relationship, p2 P1(P2/P1). Since Process 2-3 occurs at constant pressure, the ideal gas equation of state gives %3D T3 =T V2 Introducing the cutoff ratio, r, = V3/V2 T3 = rT, = 2(898.3) = 1796.6 K %3D %3D %3D From Table A-22, h = 1999.1 kJ/kg and va = 3.97. For the isentropic expansion process 3–4 %3D VA U4 = V V2 V2 V3 %3D %3D
Transcribed Image Text:Analysis: (a) The analysis begins by determining properties at each principal state of the cycle. With T = 300 K, Table A-22 gives u, = 214.07 kJ/kg and v, = 621.2. For the isentropic compression process 1-2 %3D V2 U2 = 621.2 %3D 34.51 %3D %3D 18 Interpolating in Table A-22, we get T = 898.3 K and h, = 930.98 kJ/kg. With the ideal gas equation of state %3D %3D T V P: = P = (0.1)| = (0.1) 898.3 (18) 5.39 MPa %3D %3D 300 The pressure at state 2 can be evaluated altematively using the isentropic relationship, p2 P1(P2/P1). Since Process 2-3 occurs at constant pressure, the ideal gas equation of state gives %3D T3 =T V2 Introducing the cutoff ratio, r, = V3/V2 T3 = rT, = 2(898.3) = 1796.6 K %3D %3D %3D From Table A-22, h = 1999.1 kJ/kg and va = 3.97. For the isentropic expansion process 3–4 %3D VA U4 = V V2 V2 V3 %3D %3D
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Slope and Deflection
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.
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS