Vapor absorption refrigeration cycle for automobile engineering essay

Similarly, a refrigerator moves heat from inside the cold icebox the heat source to the warmer room-temperature air of the kitchen the heat sink.

Vapor absorption refrigeration cycle for automobile engineering essay

Simple Vapor Absorption Refrigeration System written by: The vapor absorption refrigeration system comprises of all the processes in the vapor compression refrigeration system like compression, condensation, expansion and evaporation.

In the vapor absorption system the refrigerant used is ammonia, water or lithium bromide. The refrigerant gets condensed in the condenser and it gets evaporated in the evaporator. The refrigerant produces cooling effect in the evaporator and releases the heat to the atmosphere via the condenser. The major difference between the two systems is the method of the suction and compression of the refrigerant in the refrigeration cycle.

In the vapor compression system, the compressor sucks the refrigerant from evaporator and compresses it to the high pressure. The compressor also enables the flow of the refrigerant through the whole refrigeration cycle.

In the vapor absorption cycle, the process of suction and compression are carried out by two different devices called as the absorber and the generator. Thus the absorber and the generator replace the compressor in the vapor absorption cycle. The absorbent enables the flow of the refrigerant from the absorber to the generator by absorbing it.

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Another major difference between the vapor compression and vapor absorption cycle is the method in which the energy input is given to the system.

In the vapor compression system the energy input is given in the form of the mechanical work from the electric motor run by the electricity. In the vapor absorption system the energy input is given in the form of the heat. This heat can be from the excess steam from the process or the hot water.

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The heat can also be created by other sources like natural gas, kerosene, heater etc. Just like in the traditional condenser of the vapor compression cycle, the refrigerant enters the condenser at high pressure and temperature and gets condensed.

The condenser is of water cooled type. When the refrigerant passes through the expansion valve, its pressure and temperature reduces suddenly. This refrigerant ammonia in this case then enters the evaporator. The refrigerant at very low pressure and temperature enters the evaporator and produces the cooling effect.

In the vapor compression cycle this refrigerant is sucked by the compressor, but in the vapor absorption cycle, this refrigerant flows to the absorber that acts as the suction part of the refrigeration cycle.

The absorber is a sort of vessel consisting of water that acts as the absorbent, and the previous absorbed refrigerant. Thus the absorber consists of the weak solution of the refrigerant ammonia in this case and absorbent water in this case.

When ammonia from the evaporator enters the absorber, it is absorbed by the absorbent due to which the pressure inside the absorber reduces further leading to more flow of the refrigerant from the evaporator to the absorber.

At high temperature water absorbs lesser ammonia, hence it is cooled by the external coolant to increase it ammonia absorption capacity.

The absorption refrigeration system comprises of condenser, expansion valve, evaporator, absorber, pump and generator.

The refrigerant leaving the evaporator enter the absorber, where it is absorbed by the absorbent. The strong solution of refrigerant-absorber enters the generator with the help of the pump.The refrigerant vapor will be condensed by transferring heat to the surroundings.

With these processes, the refrigeration effect can be produced by using heat energy. However, the cooling effect cannot be produced continuously as the process cannot be done simultaneously.

Therefore, an absorption refrigeration cycle is a combination. IV. DESCRIPTION OF ABSORPTION SYSTEM This refrigeration system consists of a condenser, an expansion valve and an evaporator similar to a Vapor Compression Refrigeration System.

But the compressor of the Vapor Compression Refrigeration System is . Download-Theses Mercredi 10 juin Read this essay on Theoretical Performances of Various Refrigerant–Absorbent Pairs in a Vapor-Absorption Refrigeration Cycle by the Use of Equations of State.

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Vapor absorption refrigeration cycle for automobile engineering essay

The absorption cycle is similar to the compression cycle, except for the method of raising the pressure of the refrigerant vapor. In the absorption system, the compressor is replaced by an absorber which dissolves the refrigerant in a suitable liquid, a liquid pump which raises the pressure and a generator which, on heat addition, drives off the refrigerant vapor from the high-pressure liquid.

Vapor Absorption Refrigeration Cycle For Automobile tranceformingnlp.com Vapor Absorption Refrigeration Cycle For Automobile Engineering Essay.

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