In fact, conventional refrigerators use this method of cooling to keep your leftovers and drinks chilled. 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. Why do we need throttling in vapor compression refrigeration. Principles of vapour compression heat pumps springerlink. Vapor compression refrigeration transports large quantities of heat with a small mass of circulating fluid. This is because the compression ratio is too high to reach the temperatures necessary for evaporates and condenses the steam. Currently, the mechanical vapor compression systems used for this purpose, use large. Vapor compression distillation numbers reference the points in the diagrams above and below 1. Energy management handbook sixth edition, chapter 8. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The compression process increases the temperature of refrigerant from lower limit t2 to the upper limit tl. 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.
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. Simple vapour compression system mechanical engineering. It is also used in domestic and commercial refrigerators, largescale warehouses for chilled or frozen storage of foods. It is also used in domestic and commercial refrigerators, largescale. Apr 18, 2014 assuming the compression process to be isentropic find. Apr 02, 2016 vapour compression refrigeration system 1. In these slides i have discussed about vapour compression system. 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.
Cycle analysis with liquidsuction subcooler basically there are three methods of subcooling in vapor compression refrigeration system, i. Review of vapour absorption refrigeration and vapour. Vapour compression refrigeration system slideshare. The refrigeration system used was a direct air expansion unit powered by steam from the ships boiler. Introduction a single stage vapour compression refrigeration system has one low side. 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. The presentation will give you idea about the vapor compression refrigeration system. 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.
Mechanical vapor compression mechanical vapor compression is very suitable for the recovery of high quality water. They showed an inversely proportional relation between the cop and the. Low freezing point by which we can maintain the low evaporator temperature. This is an important advantage as against the conventional vapour251compression system which operates on high grade energy. How vaporcompression cooling works electronics cooling. Vapour absorption refrigeration system linkedin slideshare.
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. 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. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Discuss the use of flash tank for inter cooling only. The cycle depicted in figure 1 offers several advantages for electronic cooling applications. Vapor compression systems can reject heat far from the source by separating the evaporator and condenser in a socalled split system. Vapour compression refrigeration system linkedin slideshare. 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. It is also used in domestic and commercial refrigerators, largescale warehouses for. Find powerpoint presentations and slides using the power of, find free presentations research about vapor compression refrigeration cycle ppt.
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. Nonvapor compression hvac technologies report department. Experimental analysis of a vapour compression refrigeration system. Multistage vapour compression refrigeration systems departmen of mechanical engineerin lecture17 multistage vapour compression refrigeration systems 1. At low temperatures the saturation pressures are low 0. The vapour compression refrigeration and vapour absorption refrigeration systems were developed around 1870. This case study demonstrates the modeling of a vapour compression refrigeration system using r22 as refrigerant. Steam jet refrigeration system seminar report download. Vapor compression refrigeration cycle engineering essay. Working fluid for vapor absorption refrigeration system vars properties of working fluid refrigerant absorbent system.
Vaporcompression refrigeration is one of the many refrigeration cycles available for use. Liquidsuction subcooler is using a heat exchanger, the heat. Gandhinagar institute of technology subject applied thermal and hydraulic engineering2140907 branch electrical topic refrigeration vapour compression refrigeration system 2. The evaporating temperature is 25 oc and condensing temperature 47 oc. 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. At point 1, let t 1, p 1 and s 1 be the temperature, pressure and entropy of the vapour refrigerant.
Ppt vapour compression cycle powerpoint presentation, free. Layout of the r22 vapour compression refrigeration system. A free powerpoint ppt presentation displayed as a flash slide show on id. The vapour at low pressure and low temperature point 2 enters to compressor where it is compressed reversible adiabatically isentropically. These systems were applied successfully to refrigeration in the early years of this century. Pdf solar powered vapour absorption refrigeration spvar. Absorption refrigeration cycle vapour compression absorption water chiller chiller use a compressor to move. The refrigerant as a mixture of liquid and vapour corresponding to state point 1 enters the compressor where isentropic compression takes place. Steam jet refrigeration system seminar report download introduction in steam jet refrigeration systems, water can be used as the refrigerant.
In this lesson, one will learn how to solve the problems on vapour compression cycle. 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. To create an air cooling system, the evaporator acts as a refrigerant to an air heat exchanger. 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. View and download powerpoint presentations on vapor compression refrigeration cycle ppt. Introduction a single stage vapour compression refrigeration system has one low side pressure evaporator pressure and one high side pressure condenser pressure. The first practical vapourcompression refrigeration system was built by james harrison, a british journalist who had emigrated to. Ppt vapor compression cooling vcc in electronics powerpoint. 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. Discuss the use of flash tank for flash gas removal only. All that is required to accomplish this is to modify the evaporator to accommodate the systems that are being cooled. Assuming the compression process to be isentropic find.
System description the layout of the system is shown in figure 1. Vars is also belongs to class of vapor cycle is similar to the vcrs. The refrigerated hold was insulated using powdered charcoal. 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. Jun 19, 2014 it is a type of common refrigeration system. Working fluid for vapor absorption refrigeration system vars some experimental results for different fluid various designs of vars cost analysis conclusions 2. 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. Vapor compression distillation fresh water generator.
Mar 26, 2007 air conditioners also employ a vapor compression cycle to cool the ambient air temperature in a room. Vapor compression cooling for high performance applications. These type of generators are used where heating source is not available. Zheng and meng 2012 have studied the thermodynamic mechanism of hybrid cycle and they plotted a graph for compression. While the employment of natural refrigerants continues to this day, the development of. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. 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. In order to achieve this we have to expand the liquid refrigerant coming out the condenser. Combined vapour compressionejector refrigeration system. In the vapour absorption system, an absorber, a pump, a generator and a pressurereducing valve replace the compressor. It has been and is the most widely used method for. Ppt vapour compression cycle powerpoint presentation.
Layout of the r22 vapourcompression refrigeration system. Performance analysis of vapour compression refrigeration system with r404a, r407c and r410a jyoti soni 1 and r c gupta corresponding author. Ueeneej103a establish the basic operating conditions of. Development of the vapour compression system in mid 19th century. Apparatus figure 1 shows the experimental setup in details. Key components in the refrigeration system are a compressor, a condenser, an evaporator and an expansion valve. If you continue browsing the site, you agree to the use of cookies on this website. Air conditioners also employ a vaporcompression cycle to cool the ambient air. This explains the operation and working principle of a vapor compression distillation type fresh water generator. Vapor compression refrigeration system basic, working. Incro water is therefore said to be the great source of making a water pure by doing the purification processes.
Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Comparison of vapour absorption system with vapour. The refrigeration capacity is 8 tr and the compression is adiabatic reversible process. Experimental analysis of a vapour compression refrigeration system by using nano refrigerant. The vapour compression cycle is used in most of the modern refrigeration systems in large industrial plants. Pdf textbook of refrigeration and air conditioning by r. Both a steadystate and a transient simulation will be considered. Vapour absorption refrigeration system ppt free download as pdf file. Mar 09, 2016 comparison of vapor absorption system with vapor compression system can be done in 9 aspects. In the illustration of the models of throttling devices, only those for capillary tubes are given because capillary tubes are used widely. Vapor compression refrigeration system basic, working, parts of system, advantages, and disadvantages introduction. 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.
Mechanical vapor compression is very suitable for the recovery of high quality water. 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. It is self sustaining and requires very less energy to produce water. Comparison of vapor absorption system with vapor compression system can be done in 9 aspects. This is because the compression ratio is too high to reach the temperatures. Recent developments in simulation techniques for vapour. The vapor compression refrigeration cycle, step by step. The steam generated due to evaporation of seawater is used as heating source to generate more steam. 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. Vapor compression refrigeration cycle ppt xpowerpoint.
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. Vapour compression refrigeration highly compressed flu ids tend to get colder. Vapour absorption system vapour absorption system is an attractive method for utilizing low grade energy directly for cooling. Vapor compression refrigeration cycle objective determining the coefficient of performance of a vapour compression refrigeration cycle. The process 12 represents a compression path that may. 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. 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.