Analysis of Refrigeration System Thermodynamics and Performance

This report presents a comprehensive analysis of a refrigeration system's thermodynamics, focusing on the fundamental principles and operational characteristics. The study details the system's components, including the compressor, condenser, expansion valve, and evaporator, and their respective functions. The report outlines the experimental setup, including the flow rates of cooling and heating water, and the recorded temperatures and pressures. The data collected is used to calculate key performance indicators such as the refrigeration capacity and the coefficient of performance (COP). Furthermore, the report illustrates the thermodynamic processes using a P-h diagram and discusses the cyclic nature of the refrigeration process. The analysis concludes with a summary of the refrigerant's thermodynamic changes and the effectiveness of the system's design and operation.

THERMODYNAMICS
[Author Name(s), First M. Last, Omit Titles and Degrees]
[Institutional Affiliation(s)]

INTRODUCTION
The refrigeration cycles basically refers to the conceptual and the models of the mathematics
which are used for heat pumps and the generators.
EXPERIMENT
OBJECTIVE
1. To learn the basics of the engineering of refrigeration
2. To establish the functional relationship between the components of the thermodynamic
processes and the refrigeration system.
3. To develop mathematical approaches for the calculation.
PROCEDURE
I. The experimental set up was as shown below.
II. The flow rate of the cooling water was set to 100cm3/min
III. The flow rate of the heating water was also set at 100cm3/min
IV. The flow rate of the refrigerant was set to any value
V. The temperature at the outlet was set at 60 degrees celcius and marked T6
VI. The system was run until a steady state was achieved.
VII. Operating temperatures of T5 and T8 were recorded.
VIII. The pressures in the evaporator P1 and the condenser P2 were recorded.
IX. The compressor was then turned off
X. The experimental unit was turned off at the main switch
XI. Finally the water supply was turned off
Figure 1: Diagram set up (Groot & Mazur 2013).

RESULTS
T5 T6 T7 T8 P1 P2 Vhw(cm3/
min)
Vr(L/hr.)
158 70 30 11 1.35 1.45 200 20x102
Refrigerant mass flow
(0.4)x(55.5x104)=22.2x104kg/s
Refrigeration capacity
(22.2x104)x(353-330)=27.3x106
Condensing Capacity
(400-210)(22.2x104)=377x106
Coefficient of performance
(353-230)/(400-353)=123/47
=2.617
Plotting of the similar values give a graph sample that has been shown below
Figure 2:P-h diagram(Bejan 2016).

DISCUSSIONS
The system of the compression refrigeration is made up of the following components
 Compressor
 Condenser
 Expansion Valve
 Evaporator
Figure 3:Components of the refrigeration system( Bejan 2016).
Compressor functions as the driving unit of the compressor refrigeration
Condenser functions as the heat exchanger
The expansion valve functions to lower the pressure.
Evaporator too functions as heat exchanger but the heat is extracted from the environment.
CONCLUSION
The description of the refrigerant thermodynamic changes has been effectively achieved using an
anticlockwise cyclic process. The diagram used illustrates the simple process.

REFERENCES
Groot, S. R., & Mazur, P. (2013). Non-equilibrium thermodynamics. Courier Corporation.
Bejan, A. (2016). Advanced engineering thermodynamics. John Wiley & Sons.