User Account

All Pages

Thermodynamics, Mechanical Engineering

Assignment Help:
Problem specification
5 kg of air is contained in a piston-cylinder device, initially at a pressure of 2MPa and a specific volume of 0.08m3/kg. The air then expands, as an ideal gas, through a polytropic process, with variable values of n, to a final specific volume of 0.30m3/kg.
Objective:
Write a MATLAB code to solve for the pressure and temperature variation throughout the expansion process and to calculate the work and heat produced in the processes for variable values of n.
Procedure:
1. Begin by defining the temperature at the initial state and then define the temperature and pressure at the final state. Sketch a rough graph of what the process looks like on P-v coordinates. Write out by hand the equations and steps you would take to determine the actual P, T, and v at all points along the process. Identify unknowns, equations, constants, and calculation orders.
2. Using your hand calculations as a guide, write a simple MATLAB m-file to calculate the properties at points along the process (minimum of 20 points, but should be a variable that can be changed) using one of the values of n (I recommend using n=1.5). Plot P-v and T-v diagrams for the process using MATLAB.
3. Calculate the work performed for the process by integrating the curve of pressure versus specific volume. Use the “trapezoidal area method” for calculating the integral.
4. Assume that the specific internal energy for the air in this problem can be defined as a function of temperature as follows:
??(??)=(1.0344*10-4)*??2+(6.4476*10-1)*??+(1.3727*102)
Add code to your MATLAB program to calculate the specific internal energy for the process using the information of the pressure and specific volume at each state.
5. Using conservation of energy and the work calculated, determine the amount of heat transferred for each process.
6. Write a loop in the code to analyze the different values of n, or run the code for the different values of n asked for below.
Deliverables
1. Hand calculations that outline planned MATLAB code.
2. MATLAB code (m-file) that calculates the state variables P, v, T, and u for the defined process, and that calculates the work and heat for each process.
3. On the same graph, plot of P-v for this process with 4 different values of n: 1, 1.4, 1.5, 1.8.
4. Plot of P-v and T-v for n=1.5 on a single graph. Use the function plotyy.
5. Table summarizing results of work and heat as a function of n.
6. A brief paragraph detailing what you learned in this exercise and how useful you think these skills will be for your future as an engineer. This is not a BS question, I want you to provide me with useful information about your experience. If you didn’t learn anything here because you already are a pro at MATLAB, say that!

Related Discussions:- Thermodynamics

Fermenter, The features of a typical fermenter (as shown below) are enginee...

The features of a typical fermenter (as shown below) are engineered to enable efficient culture of microbial, mammalian or insect cells and  facilitate  ease  of operation for the

Determine the number of leaves and initial curvature, Determine the number ...

Determine the number of leaves and initial curvature: A leaf spring with a span of 1.40 m consist width and thickness of leaves to be 100 mm and 12 mm respectively. The maximu

Tributary lateral load, Tributary lateral load:   The question is on a f...

Tributary lateral load:   The question is on a fictitious 1965 building in Albany, NY. It was designed using the 1964 State Building Construction Code, in which Allowable Stress

Preliminary analysis in mining industry, I have selected Mining Industry an...

I have selected Mining Industry and have selected three rival Mining Companies to conduct a preliminary analysis. I have done my bachelor's degree in Mechanical Engineering, I have

Total decrease in length - hollow cast iron cylinder, Total decrease in len...

Total decrease in length: Q: A hollow cast iron cylinder 4 m long, 300 mm is the outer diameter, and thickness of metal 50 mm is subjected to central load on top when standin

Shear force and bending moment, Shear Force and Bending Moment: Shea ...

Shear Force and Bending Moment: Shea r Force (S.F.) Algebraic sum of all vertical forces at any section of beam to the right or left of the section is known as shear for

Mounting systems for the welding head-fixed type:, Fixed type In this se...

Fixed type In this set up, the welding head is kept fixed and the movement required during welding is provided through in the jobs to be welded. A typical application of this arr

Magnitude of a couple - mechanics, Magnitude of a couple: So l.: Fo...

Magnitude of a couple: So l.: For system, magnitude of couple is equal to algebraic sum of the moment about any point If the system reduces to couple, the resultant forc

Resultant of axial and bending stress for beams, Dear Sir, I wish to know t...

Dear Sir, I wish to know the equation for finding the resultant of the axial stress and bending stress for beams. Can you please help me. thanx in advance, Krishna.

What do you mean by rigid bed models, Q. What do you mean by Rigid bed mode...

Q. What do you mean by Rigid bed models? Models with rigid boundary and geometrically similar form are used in studies connected with outlet works, stilling basins, spillways

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd