It is also used in domestic and commercial refrigerators, largescale warehouses for. Vapor compression refrigeration cycle engineering essay. Currently, the mechanical vapor compression systems used for this purpose, use large. Working fluid for vapor absorption refrigeration system vars some experimental results for different fluid various designs of vars cost analysis conclusions 2. Vapor compression distillation numbers reference the points in the diagrams above and below 1. Recent developments in simulation techniques for vapour. 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. Incro water is therefore said to be the great source of making a water pure by doing the purification processes. 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. If you continue browsing the site, you agree to the use of cookies on this website. This is an important advantage as against the conventional vapour251compression system which operates on high grade energy. Comparison of vapour absorption system with vapour. 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. While the employment of natural refrigerants continues to this day, the development of.
This explains the operation and working principle of a vapor compression distillation type fresh water generator. Vapor compression refrigeration system basic, working, parts of system, advantages, and disadvantages introduction. Vaporcompression refrigeration is one of the many refrigeration cycles available for use. Pdf solar powered vapour absorption refrigeration spvar. 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. Experimental analysis of a vapour compression refrigeration system by using nano refrigerant. Mar 09, 2016 comparison of vapor absorption system with vapor compression system can be done in 9 aspects. It has been and is the most widely used method for. Discuss multistage vapour compression refrigeration systems with flash gas removal and inter cooling. The first practical vapourcompression refrigeration system was built by james harrison, a british journalist who had emigrated to. Principles of vapour compression heat pumps springerlink. Multistage vapour compression refrigeration example1 two stage compression system with water intercooler uses r4a as shown in figure1.
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. This is because the compression ratio is too high to reach the temperatures. A free powerpoint ppt presentation displayed as a flash slide show on id. Vapor compression systems can reject heat far from the source by separating the evaporator and condenser in a socalled split system. The refrigerant as a mixture of liquid and vapour corresponding to state point 1 enters the compressor where isentropic compression takes place. Zheng and meng 2012 have studied the thermodynamic mechanism of hybrid cycle and they plotted a graph for compression. 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. All that is required to accomplish this is to modify the evaporator to accommodate the systems that are being cooled.
The vapour compression cycle is used in most of the modern refrigeration systems in large industrial plants. Apparatus figure 1 shows the experimental setup in details. Cycle analysis with liquidsuction subcooler basically there are three methods of subcooling in vapor compression refrigeration system, i. Apr 02, 2016 vapour compression refrigeration system 1. Ppt vapor compression cooling vcc in electronics powerpoint. The vapour at low pressure and low temperature point 2 enters to compressor where it is compressed reversible adiabatically isentropically. The vapor compression refrigeration cycle, step by step.
View and download powerpoint presentations on vapor compression refrigeration cycle ppt. 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. In fact, conventional refrigerators use this method of cooling to keep your leftovers and drinks chilled. This is because the compression ratio is too high to reach the temperatures necessary for evaporates and condenses the steam. Vapor compression distillation fresh water generator. Multistage vapour compression refrigeration systems departmen of mechanical engineerin lecture17 multistage vapour compression refrigeration systems 1. These systems were applied successfully to refrigeration in the early years of this century. Combined vapour compressionejector refrigeration system. Mar 26, 2007 air conditioners also employ a vapor compression cycle to cool the ambient air temperature in a room.
At low temperatures the saturation pressures are low 0. The process 12 represents a compression path that may. Vapour compression refrigeration system slideshare. Introduction a single stage vapour compression refrigeration system has one low side pressure evaporator pressure and one high side pressure condenser pressure. Comparison of vapor absorption system with vapor compression system can be done in 9 aspects. Discuss the use of flash tank for inter cooling only. The cycle depicted in figure 1 offers several advantages for electronic cooling applications. Steam jet refrigeration system seminar report download introduction in steam jet refrigeration systems, water can be used as the refrigerant. Ppt vapour compression cycle powerpoint presentation, free. These type of generators are used where heating source is not available. In the vapour absorption system, an absorber, a pump, a generator and a pressurereducing valve replace the compressor. Vapor compression refrigeration cycle ppt xpowerpoint. Vapour compression refrigeration system linkedin slideshare. Absorption refrigeration cycle vapour compression absorption water chiller chiller use a compressor to move.
How vaporcompression cooling works electronics cooling. It is self sustaining and requires very less energy to produce water. System description the layout of the system is shown in figure 1. Download textbook of refrigeration and air conditioning by r. For 30 years, topics such as air refrigeration cycles and systems, vapour. 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. Introduction a single stage vapour compression refrigeration system has one low side.
Apr 18, 2014 assuming the compression process to be isentropic find. Vapor compression refrigeration transports large quantities of heat with a small mass of circulating fluid. 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. Vapor compression refrigeration cycle objective determining the coefficient of performance of a vapour compression refrigeration cycle. In the illustration of the models of throttling devices, only those for capillary tubes are given because capillary tubes are used widely. Jun 19, 2014 it is a type of common refrigeration system. Mechanical vapor compression is very suitable for the recovery of high quality water. Why do we need throttling in vapor compression refrigeration. Winner of the standing ovation award for best powerpoint templates from presentations magazine. 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. 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.
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. This case study demonstrates the modeling of a vapour compression refrigeration system using r22 as refrigerant. 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. It is also used in domestic and commercial refrigerators, largescale.
Vapour compression refrigeration highly compressed flu ids tend to get colder. The presentation will give you idea about the vapor compression refrigeration system. Steam jet refrigeration system seminar report download. The refrigeration system used was a direct air expansion unit powered by steam from the ships boiler. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Ueeneej103a establish the basic operating conditions of. Both a steadystate and a transient simulation will be considered. Vapour absorption system vapour absorption system is an attractive method for utilizing low grade energy directly for cooling. The vapor compression cycle can be used to cool air, liquid, or cold plates.
In these slides i have discussed about vapour compression system. In this lesson, one will learn how to solve the problems on vapour compression cycle. Air conditioners also employ a vaporcompression cycle to cool the ambient air. Vapor compression refrigeration system basic, working. Vapour absorption refrigeration system linkedin slideshare. They showed an inversely proportional relation between the cop and the. 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 compression process increases the temperature of refrigerant from lower limit t2 to the upper limit tl.
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. It is also used in domestic and commercial refrigerators, largescale warehouses for chilled or frozen storage of foods. 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. Find powerpoint presentations and slides using the power of, find free presentations research about vapor compression refrigeration cycle ppt. The vapour compression refrigeration and vapour absorption refrigeration systems were developed around 1870. Simple vapour compression system mechanical engineering. Low freezing point by which we can maintain the low evaporator temperature. Energy management handbook sixth edition, chapter 8. The refrigeration capacity is 8 tr and the compression is adiabatic reversible process.
In order to achieve this we have to expand the liquid refrigerant coming out the condenser. 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. 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. At point 1, let t 1, p 1 and s 1 be the temperature, pressure and entropy of the vapour refrigerant. 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. Discuss the use of flash tank for flash gas removal only. In vcrs the main purpose is to get required condition of refrigerant at evaporator inlet pressure and tempearture. Development of the vapour compression system in mid 19th century. Pdf textbook of refrigeration and air conditioning by r. Review of vapour absorption refrigeration and vapour. Nonvapor compression hvac technologies report department.
Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Vars is also belongs to class of vapor cycle is similar to the vcrs. Solar power vapour absorption refrigeration spvar system will provide an affordable mechanism for preserving fruits and vegetables on. Key components in the refrigeration system are a compressor, a condenser, an evaporator and an expansion valve. Liquidsuction subcooler is using a heat exchanger, the heat. The evaporating temperature is 25 oc and condensing temperature 47 oc. 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. 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.
To create an air cooling system, the evaporator acts as a refrigerant to an air heat exchanger. Layout of the r22 vapour compression refrigeration system. Ppt vapour compression cycle powerpoint presentation. Vapour absorption refrigeration system ppt free download as pdf file. Performance analysis of vapour compression refrigeration system with r404a, r407c and r410a jyoti soni 1 and r c gupta corresponding author. Comparison of vapor absorption system with vapor compression.
232 1315 428 1215 29 684 946 1362 143 831 123 1327 505 536 252 1350 840 369 473 364 1420 1156 1410 1080 538 312 1022 948 869 894 1167 870 469 660 230 1396 909 187 1229 706 156 326 16 644 1237 814