The standard vapor compression refrigeration system is a condenser, evaporator. Vapour absorption refrigeration system ppt free 30day trial. In the early years of the twentieth century, the vapor absorption cycle using water ammonia systems was popular and widely used. The principle can also be used to aircondition buildings using the waste heat from a gas turbine or water heater. The low pressure ammonia vapour leaving the evaporator enters the absorber where it is absorbed by the cold water in the absorber. A new absorptioncompression refrigeration system using a mid. Difference between vapour compression and vapour absorption pdf. When the refrigeration temperature is lower than 30 c, the performance dramatically decreases. Overview of vapor absorption chilling systems course content one of the oldest methods to mechanically cool a space is with absorption technology. Following table is the one type on vapour indicating absorption refrigeration system using heating coil. Refrigeration is a accomplished by various methods, such as the vapour compression system, absorption system, steam jet refrigeration cycle.
Some basic refrigeration cycles are discussed here through different diagrams. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Classification of refrigeration system types of refrigeration. Vapour absorption refrigeration systems vars belong to the class of vapour. Overview of vapor absorption cooling systems cedengineering. Before moving further on differences lets have an overview of both the vapour compression and vapour absorption refrigeration system. Vapor compression refrigeration system basic, working, parts of system, advantages, and disadvantages introduction. In the vapour absorption system the compressor is replaced by an absorber,a pump,a generator,and a pressure reducing valve. We proposed a new absorptioncompression refrigeration system to produce cooling energy at 30 c to 55 c.
Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. The ppt contains detailed study of vapor absorption refrigeration system with. In vapor absorption system, the liquid refrigerant leaving the evaporator does not put any bad effect on the system except to reduce the refrigerant effect. This type of refrigeration is usually used for domestic purposes only as it is complex in the construction and working. Today we will study the difference between vapour compression and vapour absorption refrigeration system in detail.
The absorption systems use heat energy in form of steam, direct fuel firing or. The substance which works in a heat pump to extract from a cold body and to deliver it to a hot body is called refrigerant. Various researchers stated few factors on which the vapour compression refrigeration system and absorption refrigeration system are compared. Integration of an ammoniawater absorption refrigeration. Obtain expression for maximum cop of ideal absorption refrigeration system section 14.
At the bottom of the articles you can download pdf. The absorption system tain domestic applications have moving this was accomplished he extinguished parts reduced to a minimum. Refrigeration cycle is the basis of all refrigeration systems. In this paper, performance of the fabricated system is. Environment friendly vapour absorption chilling of 1. Thermoelectric refrigeration mechanical project abstract.
Vapour absorption refrigeration system with diagram. The absorption system considered uses ammonia as the refrigerant and water as the absorber to create a continuous cycle for the ammonia. Chilled water is produced based on the principle that. This system may be used in both the domestic and large industrial refrigerating plants. Fluids suitable for refrigeration purposes can be classified into primary and secondary refrigerants. In compressor systems, there is a huge requirement of power by the compressor while minimum power is required for the pump in absorption system to run the system.
The water has the ability to absorb the large quantity of ammonia vapour. Cooling transfer of heat from source to sink by performing an external work. This contribution is nearly 100 times greater than the direct contribution of the. Mathematical model of a vapour absorption refrigeration unit system designers in the design of the most fundamental components.
The condenser and evaporator are air cooled heat exchangers extracted from a split unit air conditioning system. Vapor absorption cooling system mechanical seminar topic. Vapor absorption refrigeration system vars 1 faculty name. The system is designed and tested for various operating conditions using hot water as heat source. The weak liquid absorb ammonia vapour in the absorber liberating the hydrogen free and become strong solution. It consists mainly of a generator, a condenser, an evaporator, an absorber, a solution heat exchanger and a circulation pump. This type of refrigerator is also called threefluids absorption system. Pachorkar, steady state analysis of vapour absorption refrigeration system using librh2o as a refrigerant international journal of emerging technology and. Primary refrigerants are those fluids, which are used directly as working fluids, for example in vapour compression and vapour absorption refrigeration systems. If you continue browsing the site, you agree to the use of cookies on this website.
The schematic sketch of doubleeffect system is shown in fig. Download vapor absorption refrigeration system presentation transcript. But in a vapor absorption cooling system the pressure difference needed to achieve flow of the refrigerant is created using a heat source. Solar powered vapor absorption system using propane and. Energy and exergy analysis of vapour absorption refrigeration. A new absorptioncompression refrigeration system using a. Ppt vapour compression cycle powerpoint presentation. Review of vapour absorption refrigeration and vapour. Comparing the absorption refrigeration cycle with the more familiar vapor compression refrigeration cycle is often an easy way to introduce it. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Vapour absorption refregiration cycle free download as powerpoint presentation. 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. A vapour absorption refrigeration system based on ammoniawater has refrigeration capacity of 100 tr.
A place where a chemical engineer can find useful presentations, books, solutions manuals, videos, term papers related to chemical engineering. So this our short presentation on the difference between vapour compression and vapour absorption refrigeration system, i hope you like it if so, let me know. What are the applications of vapour absorption refrigeration. Vapour absorption chiller vapour absorption refrigeration. These systems are more adaptable than systems based on waterlithium bromide as they can be utilized for both below zero refrigeration too over 0 0c cooling applications. An ammonia is the commonly used refrigerant in a vapour absorption system. The system is also free compressor less, as a result of which the life span of. Vapour absorption refrigeration systems linkedin slideshare. This is an important advantage as against the conventional vapour251compression system which operates on high grade energy. Uses heat energy instead of mechanical energy as in vapour compression system. Compare vapour compression refrigeration systems with continuous vapour absorption refrigeration systems section 14. The simple vapour absorption system, as shown in fig.
In the early years of the twentieth century, the vapor absorption cycle using waterammonia systems was popular and widely used. Simple vapour absorption system in this system an absorber, a pump, a generator and a pressure reducing valve replace the compressor. Ammoniumwater refrigerant is used in refrigerant and absorber. It is also used in domestic and commercial refrigerators, largescale warehouses for. Ammoniawater absorption refrigeration system is commonly used for freezing applications with temperatures lower than 0 c. A refrigeration cycle uses mechanical compressor to help circulate the refrigerant. Vapour compression 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 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. Performance analysis of vapour compression and vapour. The pressurized solution gets heated up sensibly as it flows through the solution heat exchanger by extracting heat from hot solution coming from generator state 4. Difference between vapour compression and vapour absorption. Development of vapour absorption refrigerant system for cars. This type of refrigerator was developed in 1925 by munters and battzervan when they were studying at royal institute of technology at. Introduction the vapour absorption refrigeration system is one of the method of producing refrigerating effect.
Introduction principle of operation working fluid for vapor absorption refrigeration system vars some experimental results for different fluid various designs of vars cost analysis conclusions 2. This type of refrigerator was developed in 1925 by munters and battzervan when they were studying at. The condenser and evaporator are air cooled heat exchangers extracted from a split unit air conditioning system of 2. An absorption refrigerator is a refrigerator that uses a heat source e. Explain the basic principle of a vapour absorption refrigeration system. A simple schematic of a vapour absorption refrigeration system the absorption chiller is a machine, which produces chilled water by using heat such as steam, hot water, gas, oil etc. Discuss properties of ideal and real refrigerantabsorbent mixtures section 14.
In short, absorption cooling may fit when a source of free or lowcost heat is. Nov 02, 2016 on this channel you can get education and knowledge for general issues and topics. The other components of the system are condenser, receiver, expansion value and evaporator as in the vapour compression system. 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 ppt contains detailed study of vapor absorption refrigeration system with neat sketches and description. Three fluid refrigeration is an system which does not needs any mechanical work or electrical worksno pump or compressor this was found by two students from sweden. Presentation of its content in a window or frame external to tdx framing is not. It is used to generate the vapour refrigerant in generator outlet. Before moving further on differences lets have an overview of both the vapour compression.
Design and fabrication of vapour absorption refrigeration system libr h20 article pdf available september 20 with 7,316 reads how we measure reads. A simple and practical absorption system using ammonia as refrigerant and water as absorbent described in the previous articles is an example of singleeffect cycle system for vapour absorption refrigeration system. Seminar on absorption refrigeration system pdf report download. Refrigeration is a accomplished by various methods, such as the vapour compression system, absorption system, steam jet refrigeration cycle the vapour compression system of refrigeration cycle. Design and fabrication of vapour absorption refrigeration. In vapour absorption refrigeration systems based on ammoniawater pair, ammonia is the refrigerant and water is the absorbent. Mar 09, 2016 the performance of vapor absorption system does not change with load variation. In particular, it is possible to find in a relatively crude manner the solar panel area required for a certain refrigeration effect given the relevant system temperatures. Jan 09, 2018 if you want to know how refrigeration system works you can get it in brief here. Figure 2 shows a schematic of a basic ammoniawater absorption refrigeration system.
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. High pressure ammonia vapor enters the condenser, where it transfers heat to the neighborhood. So refrigeration cycle should be known to understand the refrigeration system. Performance testing of absorption refrigeration system performance testing of absorption refrigeration system student.
Vapour absorption refrigeration system linkedin slideshare. A vapor absorption chiller vam is a machine to produce chilled water using heat source such as steam, hot water, gas, and oil. Specification of vapour absorption refrigeration system. Jul 21, 2017 the ppt contains detailed study of vapor absorption refrigeration system with neat sketches and description. In these scenarios the scientific energy recovery and the utilization of various kinds of waste heat become very important. The heating coil generator system of absorption refrigeration system has been replaced by plate frame type heat exchanger, there by utilizing the exhaust gases of the ic engine 9. 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. Vapour absorption system vapour absorption system is an attractive method for utilizing low grade energy directly for cooling. Vapor absorption refrigeration system linkedin slideshare. Vapour absorption refrigeration system authorstream. Vapour absorption refrigeration system departmen of mechanical engineerin figure 1. The standard vapor compression refrigeration system is a condenser, evaporator, throttling valve, and a compressor.
The waste heat can be utilized in many ways and one of the best practices is to use it for vapour absorption refrigeration system. The vapour absorption system is two fluid system comprising of ammonia and water. Vapour absorption refrigeration system ppt free download as pdf file. Rac lecture 14 lesson 14 vapour absorption refrigeration. In these slides i have discussed about vapour absorption. Based upon the condensation process of working fluid, there are two types of chiller. A presentation on vapour absorption refrigeration system. Feb 11, 20 the basic objective of developing a vapour absorption refrigerant system for cars is to cool the space inside the car by utilizing waste heat and exhaust gases from engine. In recent years, an energy crisis and the energy consumption have become global problems which restrict the sustainable growth. 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.
Basically, there are two types of chillers based upon the refrigeration cycle. Nonconventional ammoniabased absorption refrigeration systems. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. It is well formed as per the syllabus of gtu slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. In the vapour absorption system, an absorber, a pump, a generator and a pressurereducing valve replace the compressor. Vapour absorption refrigeration systems based on ammonia.