User Account

All Pages

thermodynamics project , Mechanical Engineering

Assignment Help:
ES 347 - Thermodynamics Project Assigned: 3/28/2013 Due: 4/25/2013
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!
For your reference, I have uploaded the m-file example_xy.m as an example of MATLAB programming and showing you some of the things you will need and can use.
I am happy to review any code problems you have, but I will not be checking code on the night before the due date, and it might take me a day or two to get to debugging any code that you send me. Therefore, plan ahead!
I will discuss the “trapezoidal area method” in class during the week of 4/1/2013.

please follow instruction

Related Discussions:- thermodynamics project

Velocity - area method, Q. What do you mean by Velocity - Area Method? ...

Q. What do you mean by Velocity - Area Method? Out of the above four categories, velocity area method is most widely used and provides more accurate results. Requirements of a

Determine the expression for crippling load, Illustrate the assumptions mad...

Illustrate the assumptions made in Euler's theory. Determine the expression for crippling load for a long column when one end of the column is fixed and other end is hinged.

Types of coated electrodes-rutile electrode, Rutile Electrode This type h...

Rutile Electrode This type has thicker coating than cellulosic coated and the flux is mainly composed of rutile (titanium di - oxide) and silicates, with a negligible amount of c

Stress analysis of components and structures, Consider the expansion loop d...

Consider the expansion loop displayed in the diagram below, which is part of a long pipeline.  The loop is made up of a uniform pipe section and is subjected to a temperature raise

Center of Gravity, Determine the Center of Gravity of a thin hollow right c...

Determine the Center of Gravity of a thin hollow right circular cone of height H and radius of the base circle R.

Determine the machining time in milling operation, Determine the Machining ...

Determine the Machining Time in Milling Operation An HSS slab mill of 100 mm diameter and 150 mm width is used on a Horizontal milling machine to mill C50 steel. The milling c

Evaluate for a vander waals gas, (a) Explain four common characteristics of...

(a) Explain four common characteristics of work and Heat? (b) Evaluate for a Vander Waals' gas which has the equation of (p +a/v 2 ) (2-b) = RT the work done at constant t

Find out the components of the force, Find out the components of the force:...

Find out the components of the force: The frame of a certain machine accelerates to the right at 0.8 g m/sec 2 . As illustrated in Figure, it carries a uniform bent bar ABC we

Evaluate force by replacing equivalent force, Evaluate force by replacing e...

Evaluate force by replacing equivalent force: In designing lifting hook, the forces acting on horizontal section through B can be determined by replacing F by equivale

Synthesis of linkages , how to calcluate & derive the equation

how to calcluate & derive the equation

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