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

Determine maximum internal diameter of hollow shaft, Determine maximum inte...

Determine maximum internal diameter of hollow shaft: A solid shaft of mild steel which is 200 mm in diameter is to be replaced by hollow shaft of alloy steel for which the al

Entropy, What is entropy microscopically

What is entropy microscopically

Implementation of material requirement planning, Implementation of Material...

Implementation of Material Requirement Planning: The total requirements for a material from an MRP schedule are given in the following table :

Determine the spring force, A double shoe brake as shown in the figure is c...

A double shoe brake as shown in the figure is capable of absorbing a torque of 1400 N-m. The diameter of the brake drum is 350mm and the angle of contact of each shoe is 100°. If t

Natural air cooling- type of cooling system, Natural Air Cooling: The...

Natural Air Cooling: The strips like extensions (fins) are integrated on the outside of the cylinder and cylinder block. These fins are designed in such a way that they can t

D.c circuits, formulae for finding gross torque developed by the armeture

formulae for finding gross torque developed by the armeture

Lets see, How is works watery flayer?

How is works watery flayer?

Factors in the design of high temperature materials, Q. Factors in the desi...

Q. Factors in the design of high temperature materials? There is typically little correlation between room temperature strength and high temperature strength of creep-resistant

Arc strikes-metallurgical defects, Arc strikes Represent any localised ...

Arc strikes Represent any localised heat affected zone caused by an arc. Arc strike tends to produce hardening particularly in high carbon steels and alloy steels. Grinding of

Write Your Message!

Captcha
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!

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