Select Currency
Translate this page

REPAIR AND FABRICATION OF A REFRIGERATOR SYSTEM

Format: MS WORD  |  Chapter: 1-5  |  Pages: 58  |  2126 Users found this project useful  |  Price NGN5,000

  DOWNLOAD THE FULL PROJECT

CHAPTER ONE

INTRODUCTION

Refrigeration is a branch of science that deals with the process of removing heat from a substance or space in order to make it cooler. Refrigerator is defined as a device that is used in cooling the internal temperature below the room temperature (that is between 250C to 300C). Generally, however, for a space or substance to be cooler, it must loss that heat to another. Also, for a space or substance to get hotter, it must absorb heat from another, which must be at higher temperature. For both process to occur, heat must be absorbed or lost, thus heat is the characteristics agent of heating and cooling, consequently, for heat flow there is absorbs at a lower temperature region and rejected at a higher temperature region, that is the quantity being determined by the temperature gradient of the two regions. The modes of heat transmission are conduction concretion and radiation of which conduct convection and radiation, of which conduction and convection are extensively involved, in domestic refrigeration. 

In refrigeration process, there is always a body employed as the heat absorber or indirect contact with the space or substance being cooled depending on the required final effect. Such cooling agents is known as refrigerant, which is known as the refrigerant, which is circulated around the evaporator that id high temperature region) and condensing region (that is higher temperature) in order to maintain a constant refrigeration process. It does it work be evaporating (when it absorbs heat up to the boiling point temperature) and by condensing when it losses the absorbed heat to return to its original liquid state, in the system. These heat when absorbed, may be classified as sensible heat or latent heat depending on the its physical effect on the refrigerants. From stage 4 to 1 is freezer O0c to 260C or 260C to O0C and then the thermostat actuates and adds heat to the refrigerant and this is sucked into the compressor then the refrigerant is in a vapour stagets enable it work and at this, there is increase in temperature and pressure.

Therefore, process 1 to 2 that is in vapour compressor work increasing in temperature and pressure. Process 2 to 3 (Q23) heat rejection. At the refrigerator is condensed by the condenser and by the condenser and it reduced to liquid.  At point 3 the refrigerant gas is liquid. At process 3 to 4 isentropic work expansion (-w34) from 3 to 4 it is not liquid. At 4, the starting point of the evaporator and it is at lower temperature and pressure when it reaches –260C the thermostat stops because any further cooling has affect on the heat cycle. All these result to the refrigerant evaporating into the surrounding space or atmosphere and needs to be physically recycled to original condition. For another turn of refrigeration. Over and over again, these processes are repeated and more cooling achieved. Moreover, the sensible heat leads to the increase in the temperature of the refrigerant while the leant heat changes refrigerant from one phase to another (solid to liquid to gas). A refrigerant cycle is said to have been completed when the refrigerant has undertaken a turn of its circulation that is from the compressor 6o the condenser to the evaporator and back to the compressor again. Another area worthy of consideration in refrigeration is the pressure effect. It has a linear and positive relationship with temperature, which is the basic property of heat transmission.

Pressure is force per unit area and can be used to increase the heat capacity of body, thus, increase in the atmospheric pressure a of a substance brings about relative increase in the boiling point of that substance. also, sudden expansion of a compressed gas brings about an effective cooling and this explains the reason why refrigerant gases are sealed and circulated under pressure. On the other hand, a reduction in atmospheric pressure of a substance brings about a comparative decrease in the boiling point of that substance. In all, pressure increase and decrease respectively of that substance. Nonetheless, the whole of the refrigeration conditions explained above is abstract in the natural realm. Heat does not flow from a cold region to a hot region, as in the refrigeration process without work being done against the natural principles hence, energy is required, which is artificially produced and at this, we now talk of refrigerators.

THE REFRIGERATOR 

This is an Electro-mechanical appliance for carrying out the artificial cooling process. It operates with the principles of fevered carnot cycle, that is it takes heat from a low temperature region and rejects it at a high temperature region. The temperature at which heat is absorbed (low) as well as that at which the heat is rejected (high) are kept constant and by so doing a net negative work is done on the system.

REFRIGERATOR OPERATION DIAGRAM
T2
High temperature Condenser

Q2 
W (work is done on the system) that is work input
Compressor
Q1
Low temperature Evaporator (Copper tubbing)

The energy for the pumping of the refrigerant round the refrigeration cycle comes from the compressor, which is the heart of refrigeration. It makes use of both mechanical and electrical components.

COMPONENTS OF REFRIGERATOR

1. Compressor

2. Condenser

3. Metering device of expansion value

4. Evaporator

5. Dryer or drier strainer

6. Capillary tube

7. Thermostat

DIAGRAM OF A REFRIGERATOR CYCLE

The touring for driving the crankshaft and consequently, the piston is produced by an electric motor, (which make use of the magnetic effects of current). The pumping effect of piston capacities the high-pressure which induces to the refrigeration. This, thus, set in motion the refrigerant, which after some physical metamorphosis, returns to the former state and continue another cycle. In the refrigerator, the condensers (as the name implies) condense the refrigerant and give out heat to the (surrounding atmosphere, while condenser fin is use circulation of air around). The metering device expands the gas as it posses through the capillary and suddenly expands into another pipe of large cross section. The evaporator consists of twining copper tubing, which is where the actual cooling action of the refrigerator takes place.

However, a lot of insulation is done to isolate the refrigerating space from the surrounding environment ant its effects. This is achieved by the following measures. 1. The body is made of or lined with poor heat conductors. 2. The inside and the outside are brightly coloured to effect light or heat reflection. 3. The condenser tubing is positioned externally at the back of the refrigerator and very poor heat conducting materials like: fibre glass, cotton wool, silk etc is used to shield away its heating effect from a system refrigerating process. Note: It is a fact that heat cannot be totally isolated from a system, all these measures are taken to reduce its effect to the barest minimum. Other appliances and modifications are put in place for convenience, efficiency, and security purpose.

  DOWNLOAD THE FULL PROJECT

REPAIR AND FABRICATION OF A REFRIGERATOR SYSTEM

Not The Topic You Are Looking For?



For Quick Help Chat with Us Now!

+234 813 292 6373

+233 55 397 8005


HOW TO GET THE COMPLETE PROJECT ON REPAIR AND FABRICATION OF A REFRIGERATOR SYSTEM INSTANTLY

  • Click on the Download Button above.
  • Select any option to get the complete project immediately.
  • Chat with Our Instant Help Desk on +234 813 292 6373 for further assistance.
  • All projects on our website are well researched by professionals with high level of professionalism.

Here's what our amazing customers are saying

Uduak From Uniuyo
IProjectMaster is the best project site for students. Their works are unique and free of plagiarism!
Excellent
Samuel From Ajayi Crowther University
You guys just made life easier for students. Thanks alot iprojectmaster.com
Excellent
Dau Mohammed Kabiru
Kaduna State College of Education Gidan Waya
This is my first time..Your service is superb. But because I was pressed for time, I became jittery when I did not receive feedbackd. I will do more business with you and I will recommend you to my friends. Thank you.
Very Good
Oluchi From Michael Opara University
If you are a student and you have not used iprojectmaster materials, you are missing big time! iprojectmaster is the BEST
Excellent
Joseph M. Yohanna
Thanks a lot, am really grateful and will surely tell my friends about your website.
Excellent
Peace From Unilag
I cried not knowing how to go about my project but the day i searched online and saw iprojectmaster, i called and got my full project in less than 15minutes, i was shocked!
Excellent
Temitayo Ayodele
Obafemi Awolowo University
My friend told me about iprojectmaster website, I doubted her until I saw her download her full project instantly, I tried mine too and got it instantly, right now, am telling everyone in my school about iprojectmaster.com, no one has to suffer any more writing their project. Thank you for making life easy for me and my fellow students... Keep up the good work
Very Good
Abraham Ogbanje
NATIONAL OPEN UNIVERSITY OF NIGERIA
At first I was afraid.. But I discovered they are legit. I will bring more patronize
Very Good
Abdulrazak Bello Marsha
Usman Dan fodio University
It was quite a better guide for project and paper presentation purpoting. Many thanks.
Average
MATTHEW NGBEDE
Ahmadu Bello University
I wish I knew you guys when I wrote my first degree project, it took so much time and effort then. Now, with just a click of a button, I got my complete project in less than 15 minutes. You guys are too amazing!
Excellent

FREQUENTLY ASKED QUESTIONS

How do I get this complete project on REPAIR AND FABRICATION OF A REFRIGERATOR SYSTEM?

Simply click on the Download button above and follow the procedure stated.

I have a fresh topic that is not on your website. How do I go about it?

How fast can I get this complete project on REPAIR AND FABRICATION OF A REFRIGERATOR SYSTEM?

Within 15 minutes if you want this exact project topic without adjustment

Is it a complete research project or just materials?

It is a Complete Research Project i.e Chapters 1-5, Abstract, Table of Contents, Full References, Questionnaires / Secondary Data

What if I want to change the case study for REPAIR AND FABRICATION OF A REFRIGERATOR SYSTEM, What do i do?

Chat with Our Instant Help Desk Now: +234 813 292 6373 and you will be responded to immediately

How will I get my complete project?

Your Complete Project Material will be sent to your Email Address in Ms Word document format

Can I get my Complete Project through WhatsApp?

Yes! We can send your Complete Research Project to your WhatsApp Number

What if my Project Supervisor made some changes to a topic i picked from your website?

Call Our Instant Help Desk Now: +234 813 292 6373 and you will be responded to immediately

Do you assist students with Assignment and Project Proposal?

Yes! Call Our Instant Help Desk Now: +234 813 292 6373 and you will be responded to immediately

What if i do not have any project topic idea at all?

Smiles! We've Got You Covered. Chat with us on WhatsApp Now to Get Instant Help: +234 813 292 6373

How can i trust this site?

We are well aware of fraudulent activities that have been happening on the internet. It is regrettable, but hopefully declining. However, we wish to reinstate to our esteemed clients that we are genuine and duly registered with the Corporate Affairs Commission as "PRIMEDGE TECHNOLOGY". This site runs on Secure Sockets Layer (SSL), therefore all transactions on this site are HIGHLY secure and safe!