Table of Contents
What is Vapour absorption system?
The Vapour absorption refrigeration systems include all processes in a vapor compression refrigeration system, such as compression, condensation, expansion, and evaporation—the refrigerant used in Vapour absorption systems as ammonia, water, or lithium bromide.
Where is Vapour absorption system used?
Vapour absorption refrigeration system is used in the applications, where solar energy is available. Lithium bromide absorption refrigeration systems are extensively used in large capacity air conditioning systems. Chilling of drinking water. Chilling of beverages and fruit juices.
What is the basic principle of Vapour absorption refrigeration system?
The lithium bromide solution acts like a compressor in drawing off “refrigerant vapour”, in this case water, from the evaporator, causing the pressure and saturation temperature to reduce to the required cooling temperature. This process is the basic principle by which the absorption cycle operates.
What is Vapour compression system and Vapour absorption system?
The Vapour compression refrigeration system has parts like Compressor, receiver, condenser, refrigerant control device, and evaporator. Whereas, Vapour Absorption Refrigeration has Parts like condenser absorber, generator, rectifier, and evaporator. Here when the operation is going it produces noise.
What are the major components of a vapour absorption system?
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.
- 2 Absorber: The absorber is used to absorb the refrigerant.
- 3 Pump:
- 3 Generator:
- 4 Analyzer:
- 5 Pressure Reducing Valve:
- 5 Condenser:
- 6 Expansion Valve:
What is difference between VCR and VAR?
Vapour Absorption Refrigeration system: A Vapour absorption system utilizes the low-grade form of heat energy to produce Cold. Whereas the VCR system needs work energy to produce cold which is a high-grade form of energy and expensive to produce.
What is the function of generator in Vapour absorption system?
V. DESIGN OF GENERATOR IN VAPOUR ABSORPTION SYSTEM The generator is used to create the same task as of the compressor in the conventional compression refrigeration cycle. It is located where the heat is available from the exhaust gases, and the important limiting factor is the space occupied by generator.
Which is better VCRS or VARS?
The VARS uses heat energy, instead of mechanical energy as in VCRS, in order to change the refrigerant condition required for operation of the cycle. In VARS, the compressor of VCRS is replaced by an absorber, a pump, a generator, and a pressure reducing valve. The COP of VARS is very low compared to VCRS.
What is the function of generator in vapour absorption system?
Why is water used in vapor absorption system?
The water, used as the absorbent in the solution, is unsaturated and it has the capacity to absorb more ammonia gas. As the ammonia from evaporator enters the absorber, it is readily absorbed by water and the strong solution of ammonia-water is formed.
Which is more efficient VCRS or VARS?
In a comparison, Ammari and Ata [30] showed that despite having a slightly larger payback period, VCR system outweighed VAR system due to its less initial cost with a simpler design and lower maintenance, less bulkiness, components are easily available in the market, and a better lifespan.