Refrigeration fundamentals heatcraft worldwide refrigeration. This section explains in basic terms the principles that are used to create the refrigeration effect. Vaporcompression refrigeration, in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for airconditioning of buildings and automobiles. Very basic diagram of the refrigeration cycle found in air conditioning and heat pump systems. This video is an animation of how the refrigeration cycle. The illustration above is a consumers understanding of refrigeration.
The refrigerant aka coolant absorbs heat from inside of your home and then pumps it outside. Compressor basic refrigeration cycle evaporator condenser receiver expansion device. In the gas cycle, the refrigeration effect is equal to the product of the specific heat of the gas and the rise in temperature of the gas in the low temperature side. It raises the pressure, temperature and enthalpy of the refrigerant by compressing the saturated gas, in an isentropic process, to a superheated. So, if the need is for heating, you would want the air cooled condenser coil indoors. These components may be in difference shape, capacity and size, but it does the same thing. Refrigeration cycle tutorial university of oklahoma. Refrigeration cycles the vapor compression refrigeration cycle is a common method for transferring heat from a low temperature to a high temperature. This video is an animation of how the refrigeration cycle works, with each components function. The refrigerant is let into and measured by a flow control device, and eventually released to the compressor. Basic refrigerator principle is reverse carnot cycle. Therefore, for the same cooling load, gas refrigeration cycle machines require a larger mass flow rate, which in. Before we dive in, lets get an understanding of four key concepts. Please practice handwashing and social distancing, and check out our resources for adapting to these times.
The science behind refrigeration berg chilling systems inc. This is the amount of heat required to turn a liquid into a gas. Boles a free powerpoint ppt presentation displayed as a flash slide show on id. In the event that a high cop of a refrigeration cycle is of greater importance compared to other factors, it is possible to significantly increase the cop. Thermodynamic calculations of twostage vapor compression refrigeration cycle with flash chamber and separate vapor mixing intercooler. This cycle is often used as a comparison cycle to describe the quality of the cyclic process. Isothermal heat transfer from cold medium to refrigerant evaporator 23. The vapor compression refrigeration cycle is nearly 200 years old, but it does not seem ready to leave the scene any time soon. You can describe something as cold and everyone will. Refrigeration cycles are the conceptual and mathematical models for heat pumps and. Chapter 11 refrigeration cycles study guide in powerpoint to accompany thermodynamics.
The refrigeration cycle explained in plain english. The refrigeration cycle is a critical component of hvac systems and is governed by the principles of thermodynamics. But before i get into this hvac training i want to go over the three ways that heat can be transferred, and yes there are only 3 ways that heat can be. Introduction a major application area of thermodynamics is refrigeration, which is the transfer of heat from a lower temperature region to a higher temperature one.
Liquids absorb heat when changed from liquid to gas. To be able to achieve the best match possible with the rectangular shape it is. The above figure shows the objectives of refrigerators and heat pumps. How air conditioning works animationpart 2 of 3 heating, chillers, and the. Refrigeration basics ppt video online download slideplayer. Training animations see how products and systems work danfoss.
This is the part of the refrigeration system that is doing the actual cooling. Learn the science behind refrigeration at berg chilling systems school of cool. Refrigeration vaporcompression cycle online training. How an air conditioner works the refrigeration cycle. The compressor does work on the refrigeration system consumes energy. This page includes animations of txvs, evras, akvs, evus, and much more. The direction of the cyclic process in thets diagram determines w hether this is a heat pump cycle refrigeration cycle or a work machine cycle steam power cycle. Basics refrigeration is the removal of heat from a material or space, so that its. Take a look inside our refrigeration and air conditioning products and see what makes them tick.
Cop changes with heat exchanger temperature approximation and tl thambient we now turn our attention to a real one stage refrigeration cycle, depicted in the next figure. Case study model 43 the vapour refrigerant is compressed in a two stage centrifugal compressor driven by a steam turbine. In any cycle application whether it is an air conditioner or heat pump or small refrigerator there is 4 major components. Dancap capillary tube selection in refrigeration danfoss. In todays lesson on hvac training i will be covering the refrigeration cycle and the 4 main components that make the cycle work. Essentially, heat is taken from a body at lower temperature, say the food you want to store in the refrigerated chamber. Another type of a heat pump is the absorption refrigeration ar cycle. Typical onestage dry refrigeration cycle we notice that. The compressor is the heart of any refrigeration or air conditioning system. Whether you need insights to help you with troubleshooting or just want to learn. Graphics and animations are used in an attempt to make it easy to understand the concepts involved. Heat pump and refrigeration cycle article about heat. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. The vapor compression cycle explained is the most common type of system used in refrigeration and air conditioning.
Animated refrigeration systemwithexplanationofcomponents. Refrigeration cycle l vapour compression refrigeration cycle l. It also includes the process of maintaining and reducing the temperature of a body below the general temperature of its surroundings. Thermodynamic calculations of twostage vapor compression.
The compressor the condensing coil the metering device the evaporator 3. Want to see what makes each danfoss solenoid valve different. For an air conditioning system to operate with economy, the refrigerant must be used repeatedly. The four points on the refrigeration cycle compressor inlet, condenser inlet, expansion valve inlet, and evaporator. Simple refrigeration cycle animated refrigeration youtube. This will reverse the direction of heat and work interactions, therefore producing a refrigeration cycle. These cycles are the conceptual and mathematical models for heat pumps and refrigerators. The main components there are four main components in a refrigeration system. Refrigeration is used in many different residential, commercial, and industrial applications, ranging from food preservation to air conditioning to liquefaction of gases like oxygen and propane. Compared to vapor compression heat pumps where the major source of work is typically mechanical, the ar heat pumps are driven primarily by thermal energy. The compressor working principle involves the reciprocating action of a piston inside a cylinder, which compresses air gas inside the cylinder. Absorption refrigeration an overview sciencedirect topics.
Vapor compression refrigeration system basic, working. Explore the extensive range of danfoss training animations for these answers and more. If we understand how the refrigeration cycle works, well understand how any air conditioner works. Zubair latif comsats institute of information technology, lahore 2. The vapor compression refrigeration cycle, step by step. Need an easy way to show customers how their refrigeration and air conditioning systems work. It does this by changing the pressure and state of the refrigerant to absorb or release heat. Two different pressures exist in the refrigeration cycle. Basic refrigeration cycle nina sri maulani 121624023 tptu 2012 2. Basic refrigeration cycle is also called as thermodynamic heat pump cycles. By far the most common method of refrigeration is the vaporcompression refrigeration cycle a. Your customers may not need to go beyond this simple understanding of refrigeration.
Remember refrigeration cycle diagram will always have the same basic components compressor, condenser, expansion device, evaporator, and refrigerant tube. Gases give off heat when changed from gas to liquid. Reciprocating compressor belong to the category of positive displacement compressors. Refrigeration cycle a reverse thermodynamic cycle whereby heat is transferred from a body with a lower temperature to a body with a higher temperature owing to the. Carnot cycle, here the enclosed area is a rectangle. This expert refrigerator troubleshooting and repair advice includes how to fix refrigerator problems such as poor cooling, running. An air conditioner works using a thermodynamic cycle called the refrigeration cycle. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Hvac the refrigeration cycle hvac training for beginners. Refrigeration is the transfer of heat by the change in.
Elhalwagi, in sustainable design through process integration second edition, 2017. Free download of dancap allows you to easily calculate a capillary tube throttling device for a refrigeration system, with empirical formulas being used for this purpose. First of all, did you know that there is no such thing as cold. The four points on the refrigeration cycle compressor inlet, condenser inlet, expansion valve inlet, and evaporator inlet are plotted on the pressureenthalpy diagram. Learn about the different stages of operation, the mechanics at play, and the resulting impact. The heat pump can be found commercially from any number of manufacturers. The water leaves the evaporator as a saturated vapour at 10 c. This figure shows the evolution of the fluid states in the refrigeration cycle over time. This is often measured at the liquids boiling point. For over 75 years, the name bitzer has stood for worldwide leading compressor technology which gives you complete confidence in any refrigeration or. Fundamentals of mechanical refrigeration systems course content introduction mechanical refrigeration is a thermodynamic process of removing heat from a lower temperature heat source or substance and transferring it to a higher temperature heat sink. Th movement cooling by the removal of heat the movement. Vapor compression refrigeration system basic, working, parts of system, advantages, and disadvantages introduction. Because its function is to absorb heat into the refrigeration system from where you dont want it, the evaporator is placed in the area to be cooled.
At this stage in the refrigeration cycle, high pressure liquid refrigerant will flow down the liquid line, through a filter drier that is designed to prevent contaminants from flowing through the system, and on to the metering device. Training animations see how products and systems work. Since it is a reversible cycle, all four processes can be reversed. The fraction of the refrigerant that flows around the second compression stage iphp side is compressed at a smaller ratio than the fraction that enters the first compression stage. I would like to copy it for my refrigeration engineering class power point presentation. May 30, 2014 commercial refrigeration services view an animation of how our refrigeration systems work.
Ii the major 4 components it part i of the refrigeration cycle we explain the general idea of the cycle now we will go more in depth. Explore the extensive range of danfoss training animations for these answers and. This video is an animation of how the refrigeration cycle works, with. Ppt refrigeration cycles powerpoint presentation free. The classroom is not equipped with real player and could not download to my desk top computer. The refrigeration cycle tells us if there is air in the central air conditioner units, what to repair after troubleshooting the refrigeration system, if there is enough air conditioner freon, or if the ac filter is dirty. Animatedrefrigerationsystemwithexplanationofcomponents. While some people have viewed this method as environmentally harmful and inefficient, the cycle is still applicable in the industrial sphere.