Describe the operation of a vapor compression cycle using a positive displacement compressor, including the identification of temperatures and pressures at various points in the cycle. Heat and refrigeration principles learning objective. Compressor basic refrigeration cycle evaporator condenser receiver expansion device. Graphics and animations are used in an attempt to make it easy to understand the concepts involved. Demonstrate the procedures for preparing and threading steel pipe ends. The first heat exchange that occurs in this basic refrigeration cycle is the evaporator.
Manual for refrigeration servicing technicians unep dtie. The basic refrigeration cycle explained january, 2020 while understanding how your air conditioning system works may not be at the top of your todo list, knowing some basic hvac functions, like the refrigeration cycle, can help you get the most out of your system. The evaporator is a heat exchange that is responsible for absorbing heat from whatever place medium that needs to be cooled. Basic components of a refrigeration circuit the components of a refrigeration system, as described in part one see fig. The compressor does work on the refrigeration system consumes energy. Topics include defrost methods, safety and operational control, refrigerant piping, refrigerant recovery and charging, and leak testing. The industrial refrigeration trainer tu155 is a selfcontained freestanding unit with extra storage space below. Refrigeration basics quiz questions 5 hvac certification. Detailed explanations of each point in the refrigeration cycle will clarify questions the reader may have.
The design of the heating, air conditioning and refrigeration program incorporates fundamentals and integrates new technologies and innovations of climate control systems for application in the real world. The cd has an excellent explanation of the basic refrigeration cycle and of superheat and of subcooling. John tomczyk refrigerant pressures, states and conditions are covered, as well as ow they apply to the refrigeration system. Thread valve onto top of can in clockwise direction. For example, in the refrigeration cycle, the evaporator cooling coil is colder than the air flowing around it, so heat flows from the warmer air into the evaporator. Study 72 terms basic refrigeration questions flashcards. Introduction and basic concepts of refrigeration and air.
The refrigeration cycle explained in plain english. Tubing or lines make the system complete so that the refrigerant will not leak out into the atmosphere. System charging procedures as they apply to these various types of air conditioning andor refrigeration systems are included. This section explains in basic terms the principles that are used to create the refrigeration effect. Refrigerant service tools co2, ammonia r4acar ac hfo1234yf tools. Jan 11, 2018 basic vapor compression cycle, the carnot cyclefour main elements are required to complete the basic refrigeration cycle, a compressor, a condenser, a metering device expansion valve in this case, and an evaporator, all labeled below in the system diagram along with connecting components. As refrigerant in the latent state or as vapor refrigerant in the process of changed state to liquid, this is the phase where it absorbs or rejects large quantities of heat. This trainer is perfect for teaching students the principles of commercial and industrial refrigeration systems. Air conditioning and refrigeration rex miller, mark r. Demonstrate procedures used for soldering and brazing tubing. Basic refrigeration cycle fundamental refrigeration. Basic refrigeration and charging procedures youtube. Any components beyond these basic 4 are called accessories. The suction line connects the evaporator or cooling coil to.
Sep 19, 2012 in the refrigeration cycle, there are five basic components. Refrigerant recovery, evacuation and charging procedure job aid r112. Maintenance and repair, refrigeration and refrigerating machinery. Domestic refrigeration trainer basic hvacr unit iconnect. This manual is designed to fill a need which exists for a concise, elementary text to aid servicemen, salesman, students, and others interested in refrigeration. The instructor package includes powerpoint presentation, narrated self. The fan on the condenser blows the heat out over the condenser coil, then the high pressure vapor will. The refrigeration training course series is intended for users who want to improve or acquire knowledge and skills in refrigeration basics and the refrigeration cycle.
Basic refrigeration training engineering teknik it. Students are prepared to troubleshoot, repair, and maintain residential and commercial refrigeration. Heating, ventilation, air conditioningrefrigeration. Explain the operation of a basic vapor compression cycle.
Basic refrigeration fundamentals covers basic concepts and theories of refrigeration as well as safe working procedures. A new hvacr service and troubleshooting book from renowned hvacr professor at ferris state university is now available as a free digital download. The refrigeration system requires some means of connecting the basic major components evaporator, compressor, condenser, and metering device just as roads connect communities. Refrigerant charging procedure for air conditioner or heat. Welcome to the manual for refrigeration servicing technicians. Hvac the refrigeration cycle hvac training for beginners. The aircooled condenser in the cycle is hotter than the ambient air, so heat flows from the hot.
Basic refrigeration and charging procedures is a 86 page manual that covers. Your customers may not need to go beyond this simple understanding of refrigeration. Start studying basic refrigeration and charging procedures. Charging cylinder 35 charging oil 36 changing oil 37 mobile charging stations 37.
Basic refrigeration and charging procedures flashcards. For an air conditioning system to operate with economy, the refrigerant must be used repeatedly. Basic refrigeration cycle explained hvac 101 step by step duration. It raises the pressure, temperature and enthalpy of the refrigerant by compressing the saturated gas, in an isentropic process, to a superheated.
Gtac 1 air conditioning basic theory introduction to air conditioning gtac11 a basic introduction assuming no previous knowledge of the subject matter. Sep 23, 20 this is the beginning of the basic refrigeration cycle training. Refrigerant system charging refrigerant charging is one of the most important and probably least understood service procedures practiced in the air conditioning industry. For this reason, all air conditioners use the same cycle of compression, condensation. The industrial refrigeration tu155 trainer is a selfcontained freestanding unit with storage space underneath. The above steps and processses describes the basic refrigeration cycle comprising of the evaporator, compressor, condenser and throttle expansion valve. This program can be incorporated into any hvacr educational curriculum that teaches basic refrigeration and charging procedures, as part of your. A solid foundation in air conditioning and refrigeration principles is crucial.
Charging charts and charging curves with examples of system applications give the reader a thorough understanding of system charging when reading this module. John tomczyk has been a professor at ferris state university for 24 years. Vapor pressures, subcooling, superheat, saturation, latent heat, and sensible heat are explained and applied to the refrigeration cycle. You now wish to top up the refrigerant charge and have hooked up a jug of the appropriate refrigerant. It is an ebook for people who are involved in training and. Th movement cooling by the removal of heat the movement of heat from a place where it is notot a ted to a wanted to a. This will assist the evacuation and dehydration process and provide additional compressor protection during the charging and startup. This document is intended to highlight the differences between hydrocarbon refrigerants and other refrigerants and to direct readers to the authoritative documents that should be consulted.
However, they may expect you to have a much greater indepth. It is intended to cover only the fundamentals of refrigeration theory and practice. May 24, 2019 basic refrigeration yogyakarta 24 27 juni 2019 rp 8. Basic refrigeration system fundamentals the compression cycle. Mechanical refrigeration is accomplished by continuously circulating, evaporating, and condensing a fixed supply of refrigerant in a closed system. Mar 01, 2019 this is a basic overview of the refrigeration circuit and how it works. The trainer is a completely self contained and fully operational unit that contains the basic components found in many refrigeration and air conditioning systems. Basic principles most of us have some ideas concerning the purpose of refrigeration and what refrigeration does. The compressor discharges high pressure, high temperature vapor through the discharge line the smaller line. Note in the diagram below that the high side hose has been removed from the dsv and that the dsv has been back seated and capped off as. Charging and startup the control circuit should be energized 24 hours before charging and startup to open the liquid line solenoid and turn on the crankcase heater. Why do we need to evacuate an air conditioning system or a refrigeration system.
Vapor pressures, subcooling, superheat, saturation, latent heat, and sensible heat are. Refrigeration an introduction to the basics danfoss. Learning about refrigeration is a never ending process and well understood fundamentals make learning more advanced concepts much easier. Refrigerant recovery, evacuation and charging procedure. Part 1 this section explains in basic terms the principles that are used to create the refrigeration effect. This is an introductory course for operators with little or no knowledge of the subject matter, or for those wishing to refresh their knowledge. It causes refrigerant to flow and is where energy is applied to perform the work of removing heat in the evaporator. Explain the basics of heat theory and the basic principles of refrigeration. Perform alternative, mechanical methods for joining pipe sections. On cooler days, special procedures like covering the condenser coil are necessary to trick the condenser into thinking its warmer.
When compiling the material for the booklet a deliberate attempt was made to pro. Troubleshooting the refrigeration cycle for mechanical problems. The compressor is the mechanical heart of a refrigeration system. When ready, turn valve fully clockwise to pierce the top of the can. The air conditioner evaporator is locate between points six and one in the basic refrigeration cycle diagram. The science behind refrigeration berg chilling systems inc. This trainer introduces the student to the basics of refrigeration and air conditioning.
This article series describes the procedures for charging an air conditioner, heat pump, refrigerator, freezer, or similar equipment how does an hvac service tech put the proper amount of refrigerant into the system. If you only study one book on refrigeration this should be the one. The basic refrigeration cycle explained gabes guides. Liquids absorb heat when changed from liquid to gas. May 21, 2007 heat flow is a basic principle of refrigeration in fact, of all hvac work. Everything depicted in this process is currently used in the refrigeration industry. Basic system components, their functions and applications are included. Refrigeration systems this course introduces refrigeration systems and applications. You will learn how theoretical refrigeration principles and laws knowledge are applied within the refrigeration industry. The refrigeration cycle video above explains the working principle of refrigeration and describes the various components and respective functions of a vapor compression cycle with stepby. Basic arena refrigeration ontario recreation facilities. The vapor compression refrigeration cycle, step by step. Evaporation occurs at a low temperature and low pressure while condensation occurs at a high temperature and high pressure. I have an unlimited ammonia refrigeration license, operate a huge ammonia system, and teach industrial refrigeration.
It is a compression process, whose aim is to raise the refrigerant pressure, as it flows from an evaporator. The refrigeration system is designed so that the refrigerant will evaporate in the evaporator at a temperature thats about 10 to 15 below the temperature setting if its a refrigerator or freezer, and the temperature will drop to around 0 in the evaporator of an ice machine or ice cream machine. Kings basic refrigeration is the absolute best text and reference for understanding refrigeration of all types ever written. Basic refrigeration trainers, technician training equipment. Jun 25, 2003 illustration of the basic refrigeration cycle. It has good sample problems that work you through the solutions. It will test your understanding of basic theory and the. Refrigeration is the process of removing heat from an area or a substance and is usually done by an artificial means of lowering the temperature, such as the use of ice or mechanical refrigeration. The vapor compression refrigeration cycle involves four components.
Now that you have some basic hvac training on components that make up the refrigeration cycle, lets learn how it actually works. Understanding the four key components of the refrigeration system, and how these components interact with one another in the refrigeration cycle is an essential step to both basic and advanced diagnostics. Guidelines for the use of hydrocarbon refrigerants in. Gases give off heat when changed from gas to liquid. Gases fused with cooling units cool air that courses through the unit. Refrigeration frameworks have gas introduced in a progression of cylinders. Intensive properties do not depend on the size of the system e. It could also be said that refrigeration is the transfer of heat from one place where it is not wanted walk in cooler, to another less objectionable place outdoors.
Hvac educational resources brownson technical school. It is usually done by an artificial means of lowering the temperature, such as by the use of ice or mechanical refrigeration, which is a mechanical system or apparatus, designed and. Manual for refrigeration servicing introduction technicians. Start a free trial of quizlet plus by thanksgiving lock in 50% off all year try it free. Extensive properties depend on the size of the system e,g, volume, internal energy, enthalpy, etc. Improperly charged systems lead to inefficient operation and premature equipment failure. Upon completion, students should be able to assist in. The course instructors are ice arena practitioners. This trainer is ideal for teaching students the principles of commercial and industrial refrigeration systems.
The illustration above is a consumers understanding of refrigeration. Refrigeration principles and how a refrigeration system. The compressor is a vapor compression pump which uses pistons or some other method to compress the refrigerant gas and send it on its way to the condenser. Heat flow is a basic principle of refrigeration in fact, of all hvac work. The course is structured with the more basic and simple content presented. Basic refrigeration and charging procedures training program. Introduction and basic concepts of refrigeration and air conditioning. From various perspectives, cool and refrigeration systems are on a very basic level equivalent to. You have reached 0 of 0 points, 0 not categorized 0% question 1 of 15. If the ambient temperature is low on the day of startup, the technician may mistake the low system pressures for low charge. Acetylene must be used to pressurize a refrigeration system. Mechanical refrigeration works by changing the the majority of heat is removed from the the majority of the works by removedchanging the absorbed heat is state of the refrigerant. Basic refrigeration cycle 56 capacity 57 refrigerants 57. There are 4 main components in a mechanical refrigeration system.
Refrigeration cycle animation vapor compression cycle explained. C02 tool basic set c02 gauge manifold co2 charging hose co2 refrigerant tool co2 refrigerant tool co2 refrigerant tool. The graph below illustrates a typical package cooling system charge. Proctor login test results replacement cards downloads home certifications store training packages basic refrigeration and charging conference news contact us procedures training program purpose of training a solid foundation in air conditioning and refrigeration principles is crucial to the proper installation, and service of modern. Basic refrigeration and charging procedures capitol supplies, inc. This video is part of the heating and cooling series of training videos made to accompany my websites. This is a basic overview of the refrigeration circuit and how it works. Refrigeration fundamentals heatcraft worldwide refrigeration. It includes an introduction to osha, the laws of thermodynamics, pressure and temperature relationships, heat transfer, the refrigeration cycle, refrigerant identification and types of ac systems. Let us assume that you have located and repaired the leak which caused the undercharged conditions. First, lets address some areas of possible confusion the word condenser can mean two different things many in.
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