Like vapour compression refrigeration system, it has condenser, expansion device and evaporator. As cooling cogeneration cycle has been developed by coupling a Kalina cycle system (KCS) with a single effect vapor absorption refrigeration (VAR) sy.Vapour absorption refrigeration system is quite similar to the vapour compression refrigeration system from design and construction point of view. The lithium bromide solution has a strong affinity for water vapour because of its very low vapour pressure. In this system, water is being used as a refrigerant whereas lithium bromide, which is a highly hydroscopic salt, is used as an absorbent. The lithium-bromide absorption refrigeration system uses a solution of lithium bromide in water.For this purpose, compressors (either reciprocating type or rotary type or centrifugal type) are employed in vapour compression refrigeration system. It is quite similar to the vapour compression refrigeration system, which uses mechanical energy to change the condition of refrigerant. Here, compressors are not used. Vapour absorption refrigeration system uses heat energy instead of mechanical energy to change the condition of refrigerant, which is essential requirement for the operation of any refrigeration system to produce refrigeration, Therefore, vapour absorption refrigeration system is called as a heat operated system or thermal energy driven system.
Necessity of Vapour Absorption Refrigeration SystemFollowing table is the one type on vapour indicating absorption refrigeration system using heating coil. In addition to method used for creating different pressure levels, the method used to circulate the refrigerant in the refrigeration system is also different in these two systems. However, method used to create two different pressure levels for evaporation and condensation of the refrigerant is different in these two systems. The process of evaporation and condensation of the refrigerant takes place at two different pressure levels to achieve refrigeration in both the refrigeration systems. Vapour compression and vapour absorption), evaporator and condenser are present. Also, in vapour compression system, the refrigerant is compressed so as to increase its pressure and power or work required is relatively large for compression of vapour refrigerant, which undergoes large change in specific volume. Therefore, operating cost of vapour compression refrigeration system is more. Since electricity is a high grade energy, it is very expensive. However, the mechanical energy required to run the compressor of vapour compression system is obtained from electricity. A vapour absorption refrigeration system based on ammonia-water has refrigeration capacity of 100 TR.Vapour compression system is comparatively more efficient than vapour absorption system. Ammonium-water refrigerant is used in refrigerant and absorber. Usb loader downloadThe principle of vapour absorption was first discovered by Michael Faraday in 1824 while performing a set of experiments to liquefy certain gases.a. Advantages of Vapour Absorption Refrigeration SystemThe vapour absorption refrigeration system is one of the oldest methods of producing refrigerating effect. In order to achieve this, vapour absorption refrigeration system is used. Hollow knight weapon upgradeNo compressor or any reciprocating component is required. The chilled liquid will enter inside this evaporator and will receive heat from the evaporator and will convert into vapour. Less wear and tear due to less number of moving parts.Components in Vapour Absorption Refrigeration System: 1 Evaporator: The main function of the evaporator is to provide cooling to the area with which it is in contact. This is an important advantage as against the conventional vapour251compression system which operates on high grade energy. Vapour Absorption System Vapour Absorption system is an attractive method for utilizing low grade energy directly for cooling. Vapour Compression Refrigeration System. Performance at part load) is better. Partial load performance (i.e. System can be used in remote places, where availability of electricity is a problem. Exhaust steam may be used as a source of heat energy in the generator. Less noisy, because the system has only one moving part (i.e. Vapour absorption refrigeration system is used in the applications, where availability of electricity is a problem. If kerosene is used for supplying heat energy to the generator, it gives out bad smell.Applications of Vapour Absorption Refrigeration Sytem It takes more time to produce the same refrigerating effect, as compared to VCC. After the absorption of water vapours by lithium bromide, the strong solution so formed is then pumped into the generator. This is done in order to increase absorption capacity of ithium bromide solution, because at higher temperature lithium bromide solution absorbs less water vapours. For example: Cooling coil using chilled water. Some form of cooling arrangement is employed to remove the heat of absorption evolved in the absorber. This hot weak lithium bromide solution flows back to absorber. So formed water vapours are driven to the condenser at high pressure leaving behind the hot weak lithium bromide solution in the generator. During the heating process, the water present in the strong solution gets evaporated. Pressure inside the system is below atmosphere. Therefore, arrangement of heat exchanger reduces cost of heating in generator and cost of cool ng in absorber.Advantages of of Lithium Bromide Absorption Refrigeration System In heat exchanger, heat from hot weak solution is transferred to the strong solution, which is comparatively cold. For this purpose, a heat exchanger is employed between the absorber and generator. The strong solution entering the generator must be heated to vapourize and separate the water vapours, whereas, the weak solution contained in the absorber must be cooled, to draw maximum amount of water vapours from the evaporator. This completes the cycle of vapour absorption system. All joints and connections should be made leakproof to prevent leakages in to the system, since the system works under vacuum. Therefore, inhibitors should be added to protect metal parts against corrosion. Lithium bromide solution is corrosive. Since the refrigerant used (water) is non-toxic, Electrolux refrigerator can be directly used for chi led coil in case of the air conditioning applications.Disadvantages of of Lithium Bromide Absorption Refrigeration System
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