Thermodynamics Laboratory Report

School of Mechanical and Manufacturing Engineering Faculty of Engineering
The University of New South Wales, Sydney
Thermodynamics Laboratory Report
by
<Name>
MMAN2700 T1 2019
Submitted:
Course Convener: A/Prof. Person
Student ID: z1234567
Abstract
This work focuses on theoretical and experimental analysis on two different systems namely
compressor with intercooler system and study of the refrigeration system.both the systems were
studied and all the relevant information about the working of the system are collected, various tests
are conducted on the system, with the help of the collected information the appropriate calculations
were made, graphs were plotted, and all the results were analysed effectively.

Contents
Abstract.................................................................................................................................................1
1. Laboratory T2 Compressor Laboratory.........................................................................................3
1.1. Overview...............................................................................................................................3
1.2. Compression Ratio vs Polytropic Index.................................................................................3
1.1.1. Example Analysis..........................................................................................................3
1.1.2. Results...........................................................................................................................6
1.1.3. Discussion......................................................................................................................6
1.3. Intercooler Performance........................................................................................................7
1.4. Conclusion.............................................................................................................................7
2. Laboratory T4 Refrigeration Laboratory.......................................................................................8
3. Discussion and Conclusion..........................................................................................................11
References:..........................................................................................................................................12

1. Laboratory T2 Compressor Laboratory
1.1. Overview
In this Laboratory work, an experimental and theoretical investigation on a Compressor system with
intercooler will be carried out. The various calculation for finding the temperatures,
pressures,polytropic index, mass flow, etc. will be carried out. All the analysis will be answered
appropriately with proper graphs if required.
1.2. Compression Ratio vs Polytropic Index
1.1.1.Example Analysis
(a) Calculation of T3 from polytrophic relation:
P ( R
T )
n
=C
T
Pn−1/ n =C
T 1
T 3 =( P 1
P 3 )
n −1 /n
Now we have:
For adiabatic process, n = 3/2
WKt,
P3: Atmospheric pressure: 1.005 Bar
P1 = 3 Bar
T1 = 294.15 K
Now,
T 1
( P3
P 1 )
n−1/ n =T 3
T 3=423.54 K
(b)
Given:
T1: 294.15
T3: 438.15
P1: 3 bar
To find: n

The process is assumed to be reversible adiabatic (Taylor, 2017):
T 1
T 3 =( P 1
P 3 )
n −1 /n
294.15
438.15 =(2.9850)n−1 /n
Log (n/ (n-1)) (0.6713) = 2.9850)
n=−17.24 n+17.2450
n=0.94
(c)
Plot n Vs pressure ratio:
Pressure ratio = P1/ P0
Now:
N Pressure Ratio
0.5 2.9850
1 4.975
1.5 8.955
2 1.990
1 1.5 2 2.5
0
1
2
3
4
5
6
7
8
9
10
Chart Title
2.985 Column2 Column3
Polutropic index n
Pressure ratio
(d)