Liquidsuction subcooler is using a heat exchanger, the heat. Vapor compression refrigeration cycle ppt xpowerpoint. Working fluid for vapor absorption refrigeration system vars some experimental results for different fluid various designs of vars cost analysis conclusions 2. Ueeneej103a establish the basic operating conditions of. The vapor compression cycle can be used to cool air, liquid, or cold plates. The basic principles of operation of heat pumps and refrigeration devices are available in a great many references, several of which 14 were utilized in the preparation of this material. Air conditioners also employ a vaporcompression cycle to cool the ambient air. In fact, conventional refrigerators use this method of cooling to keep your leftovers and drinks chilled. Gandhinagar institute of technology subject applied thermal and hydraulic engineering2140907 branch electrical topic refrigeration vapour compression refrigeration system 2. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from.
Nonvapor compression hvac technologies report department. Multistage vapour compression refrigeration example1 two stage compression system with water intercooler uses r4a as shown in figure1. Key components in the refrigeration system are a compressor, a condenser, an evaporator and an expansion valve. Vapour compression refrigeration system linkedin slideshare. Introduction the vapour absorption refrigeration system is one of the oldest methods of producing refrigerating effect the principle of vapour absorption was first discovered by michael faraday in 1824 the first vapour absorption refrigeration machine was developed by french scientist, ferdinard carre, in 1860. Simple vapour compression system mechanical engineering. Vapor compression distillation fresh water generator. Mechanical vapor compression mechanical vapor compression is very suitable for the recovery of high quality water.
Vapour compression refrigeration or vapor compression refrigeration system vcrs, 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. Comparison of vapour absorption system with vapour. In vcrs the main purpose is to get required condition of refrigerant at evaporator inlet pressure and tempearture. The vapour in this cycle is circulated through the various components of the system, where it undergoes a number of changes in its state or condition. Principles of vapour compression heat pumps springerlink.
They showed an inversely proportional relation between the cop and the. Solar power vapour absorption refrigeration spvar system will provide an affordable mechanism for preserving fruits and vegetables on. The steam generated due to evaporation of seawater is used as heating source to generate more steam. Absorption refrigeration cycle vapour compression absorption water chiller chiller use a compressor to move. This is an important advantage as against the conventional vapour251compression system which operates on high grade energy. Performance analysis of vapour compression refrigeration system with r404a, r407c and r410a jyoti soni 1 and r c gupta corresponding author. Steam jet refrigeration system seminar report download. Vars usually comes in higher capacitiesmore than 50 tr until now but china has invented lesser capacity vars machines2 tr, so it founds its applications in. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Experimental analysis of a vapour compression refrigeration system. Apr 02, 2016 vapour compression refrigeration system 1. Review of vapour absorption refrigeration and vapour.
Working fluid for vapor absorption refrigeration system vars properties of working fluid refrigerant absorbent system. Ks01ej103a basic operating conditions of vapour compression systems evidence shall show an understanding of basic operating conditions of vapour compression systems, applying safe working practices and relevant standards, codes and regulations to an extent indicated by the following aspects. Vapour absorption refrigeration system ppt free download as pdf file. Vapor compression refrigeration transports large quantities of heat with a small mass of circulating fluid. The vapour at low pressure and low temperature point 2 enters to compressor where it is compressed reversible adiabatically isentropically. Find powerpoint presentations and slides using the power of, find free presentations research about vapor compression refrigeration cycle ppt. The most commonly used method of cooling is with vaporcompression cycles, because it is fairly easy to construct a cooling device employing this method and the cost is low. These type of generators are used where heating source is not available. A free powerpoint ppt presentation displayed as a flash slide show on id. It is also used in domestic and commercial refrigerators, largescale warehouses for chilled or frozen storage of foods. Vapor compression systems can reject heat far from the source by separating the evaporator and condenser in a socalled split system.
Discuss the use of flash tank for flash gas removal only. Vapor compression cooling for high performance applications. In order to achieve this we have to expand the liquid refrigerant coming out the condenser. It is self sustaining and requires very less energy to produce water.
In the vapour absorption system, an absorber, a pump, a generator and a pressurereducing valve replace the compressor. While vapor compression technologies have served heating, ventilation, and airconditioning hvac needs very effectively, and have been the dominant hvac technology for close to 100 years, the conventional refrigerants used in vapor compression equipment contribute to global climate change when released to the atmosphere. Vapour absorption system vapour absorption system is an attractive method for utilizing low grade energy directly for cooling. How vaporcompression cooling works electronics cooling.
In the illustration of the models of throttling devices, only those for capillary tubes are given because capillary tubes are used widely. Layout of the r22 vapour compression refrigeration system. The refrigerant as a mixture of liquid and vapour corresponding to state point 1 enters the compressor where isentropic compression takes place. The cycle depicted in figure 1 offers several advantages for electronic cooling applications. Experimental analysis of a vapour compression refrigeration system by using nano refrigerant. Vapourcompression refrigeration or vaporcompression refrigeration system vcrs, 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. To create an air cooling system, the evaporator acts as a refrigerant to an air heat exchanger. Vapour compression refrigeration highly compressed flu ids tend to get colder.
Low freezing point by which we can maintain the low evaporator temperature. These systems were applied successfully to refrigeration in the early years of this century. Mar 26, 2007 air conditioners also employ a vapor compression cycle to cool the ambient air temperature in a room. It is also used in domestic and commercial refrigerators, largescale. Vapor compression distillation numbers reference the points in the diagrams above and below 1.
System description the layout of the system is shown in figure 1. View and download powerpoint presentations on vapor compression refrigeration cycle ppt. Currently, the mechanical vapor compression systems used for this purpose, use large. Multistage vapour compression refrigeration systems departmen of mechanical engineerin lecture17 multistage vapour compression refrigeration systems 1. Here harshit solves some sample questions which will help one to recollect and remember all the topics and equations which were discussed in the previous lesson. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The first practical vapourcompression refrigeration system was built by james harrison, a british journalist who had emigrated to. Vapor compression 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. Ppt vapour compression cycle powerpoint presentation, free. Layout of the r22 vapourcompression refrigeration system. The refrigeration system used was a direct air expansion unit powered by steam from the ships boiler. This case study demonstrates the modeling of a vapour compression refrigeration system using r22 as refrigerant. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Vapour absorption system can be compared with vapour compression system in 9 aspects, they are energy input, moving part, evaporator pressure, load variation, evaporator exit, coefficient of performance, capacity, refrigerant and lowest temperatures.
Why do we need throttling in vapor compression refrigeration. The vapour compression cycle is used in most of the modern refrigeration systems in large industrial plants. Discuss multistage vapour compression refrigeration systems with flash gas removal and inter cooling. The evaporating temperature is 25 oc and condensing temperature 47 oc. Pharmaceutical vapor compression distillation vcd, improperly known as thermocompression or such as mechanical vapor recompression mvr or mechanical vapor compression mvc distillation, too, is the main way to produce wfi water for injection and grade waters for pharmaceutical use. Vars is also belongs to class of vapor cycle is similar to the vcrs. Introduction a single stage vapour compression refrigeration system has one low side. At low temperatures the saturation pressures are low 0.
Multistage system of cooling is widely used there, where ultralow temperatures are required, but can not be produced economically through the use of a singlestage system. While vaporcompression technologies have served heating, ventilation, and airconditioning hvac needs very effectively, and have been the dominant hvac technology for close to 100 years, the conventional refrigerants used in vaporcompression equipment contribute to global climate change when released to the atmosphere. The presentation will give you idea about the vapor compression refrigeration system. Zheng and meng 2012 have studied the thermodynamic mechanism of hybrid cycle and they plotted a graph for compression. The refrigeration capacity is 8 tr and the compression is adiabatic reversible process.
Cycle analysis with liquidsuction subcooler basically there are three methods of subcooling in vapor compression refrigeration system, i. This is because the compression ratio is too high to reach the temperatures. Both a steadystate and a transient simulation will be considered. By araner posted 20180223 in refrigeration the vapor compression refrigeration cycle is nearly 200 years old, but it does not seem ready to leave the scene any time soon. Ppt vapor compression cooling vcc in electronics powerpoint. Ppt vapour compression cycle powerpoint presentation. Incoming water influent enters the system and runs through two heat exchangers which transfer heat to the influent from the outgoing pure water distillate and grey water concentrate. Basically, vapor compression refrigeration employs a heat engine run backwards, so heat energy is taken from a cold reservoir and deposited into a hot reservoir.
Vapour compression refrigeration system slideshare. Vapor compression refrigeration system basic, working, parts of system, advantages, and disadvantages introduction. Apr 18, 2014 assuming the compression process to be isentropic find. Development of the vapour compression system in mid 19th century. Comparison of vapor absorption system with vapor compression system can be done in 9 aspects. Vapor compression refrigeration system basic, working. While the employment of natural refrigerants continues to this day, the development of. Apparatus figure 1 shows the experimental setup in details. In these slides i have discussed about vapour compression system. For 30 years, topics such as air refrigeration cycles and systems, vapour. Download textbook of refrigeration and air conditioning by r.
The vapour absorption system uses heat energy, instead of mechanical energy as in vapour compression systems, in order to change the conditions of the refrigerant required for the operation of the refrigeration cycle. 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. The process 12 represents a compression path that may. Recent developments in simulation techniques for vapour. Vapor compression refrigeration cycle objective determining the coefficient of performance of a vapour compression refrigeration cycle. Assuming the compression process to be isentropic find. Khurmi a textbook of refrigeration and air conditioning is an aptly written textbooks for the students of mechanical engineering while also a mustread for anyone with an interest in the subject. Mar 09, 2016 comparison of vapor absorption system with vapor compression system can be done in 9 aspects. If you continue browsing the site, you agree to the use of cookies on this website. The refrigerated hold was insulated using powdered charcoal.
Vaporcompression refrigeration is one of the many refrigeration cycles available for use. The compression process increases the temperature of refrigerant from lower limit t2 to the upper limit tl. The vapor compression refrigeration cycle, step by step. Comparison of vapor absorption system with vapor compression. Pdf solar powered vapour absorption refrigeration spvar. Discuss the use of flash tank for inter cooling only.
In this lesson, one will learn how to solve the problems on vapour compression cycle. Steam jet refrigeration system seminar report download introduction in steam jet refrigeration systems, water can be used as the refrigerant. This explains the operation and working principle of a vapor compression distillation type fresh water generator. Introduction a single stage vapour compression refrigeration system has one low side pressure evaporator pressure and one high side pressure condenser pressure. Pdf textbook of refrigeration and air conditioning by r. Vapor compression refrigeration system pressureenthalpy diagram for refrigerants refrigerator, air conditioner, thermoelectric cooler, heat pump designation, choice, criteria for selection, and characteristics of refrigerants alternatives to vapor compression refrigeration system heat transfer in refrigeration applications. Vapor compression refrigeration cycle engineering essay. It is also used in domestic and commercial refrigerators, largescale warehouses for. Energy management handbook sixth edition, chapter 8. At point 1, let t 1, p 1 and s 1 be the temperature, pressure and entropy of the vapour refrigerant. The vapour compression refrigeration and vapour absorption refrigeration systems were developed around 1870.
Jun 19, 2014 it is a type of common refrigeration system. It has been and is the most widely used method for. Combined vapour compressionejector refrigeration system. Design and simulation of a vapor compression refrigeration cycle for a micro refrigerator submitted by seyfettin yildiz in partial fulfillment of the requirements for the degree of master of science in mechanical engineering department, middle east technical university by, prof.
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