Hi in this article we try to learn the topic Difference between vapour compression System and vapour Absorption system it is important point in Refrigeration and Air conditioning so let's see the detail information,

Difference between vapour compression System and vapour Absorption system

Contents :-

* Vapour Compression System

* Vapour Absorption system

* Difference between vapour compression System and vapour Absorption system

Vapour Compression System

In vapour compression system throttling device is used for to reduce pressure in evaporator state. Capillary tube is mostly used. Thermostatic expansion valve is also used for large refrigeration system.

Throttling process is an irreversible process. After this process heat transfer in evaporator effects vaporization in working method.

Difference between vapour compression System and vapour Absorption system 

Vapour Absorption system

This process consists of pump, condenser, evaporator, receiver, generator. Working fluid is ammonia and acts as refrigerant. In fig. shown low pressure ammonia leaves evaporator, and enters absorber. And is absorbed by weak solution contains less ammonia. With use of generator high vapour ammonia is condense to the condenser to form high pressure liquid ammonia. liquid ammonia pass through expansion valve to receiver and evaporator.

Difference between vapour compression System and vapour Absorption system pdf.

Sr.no.	Vapour Compression System	Vapour Absorption System
1	Vapour compression System is compact in size and requires less space.	Vapour Absorption System is requires more space.
2	Motor is required as prime mover.	Requires kerosene or electric heater as prime mover.
3	More leakage chances of refrigerant in the system.	In this, there is no moving parts to cause leakage problems.
4	Mechanical energy used as energy input.	Heat energy used as energy input.
5	In this system there is more moving parts, and cause more wear and tear and noise problems occurred in compressor.	In this system there is less moving parts, that's why less noise, wear and tear problems comes.
6	Coefficient of performance is high.	Coefficient of performance is low.
7	Electric power must required to operate.	This system used where electric power is not available.
8	Small drops of liquid may damage the compressor.	Small drops of liquid may not damage or any effect on the compressor.
9	Low capacity.	More capacity.
10	Tight seal compressor.	Generator used.
11	Easy to charge.	Difficult to charge.
12	No load effects are occurred.	Unfair or partial loads are affected.
13	More maintenance is needed.	Less maintenance is needed.

Between vapor absorption and vapor compression which one is economic for use with solar energy?

Both vapor absorption and vapor compression are methods used for refrigeration and air conditioning systems, and their economic viability for use with solar energy depends on various factors. However, in general, vapor compression systems are more commonly used and considered more economically viable for solar-powered applications. 

Efficiency: Vapor compression systems are typically more energy-efficient compared to vapor absorption systems. They can achieve higher cooling or refrigeration capacities with less energy input, making them more suitable for solar energy applications where maximizing energy conversion is crucial.

Equipment Cost: Vapor compression systems are more prevalent in the market and have a well-established infrastructure, resulting in lower equipment costs due to economies of scale. The availability of standardized components and widespread industry support also contributes to cost reduction.

System Complexity: Vapor absorption systems tend to be more complex than vapor compression systems, involving additional components such as the absorber, generator, and separator. The complexity increases the initial installation costs, maintenance requirements, and potential system failures, making vapor compression systems more attractive from an economic standpoint.

Solar Thermal Energy: Solar thermal energy, which is used to generate heat, is typically more readily available and easier to harness efficiently compared to solar photovoltaic (PV) electricity generation. Vapor compression systems can utilize solar thermal energy more effectively through direct or indirect methods, leveraging the sun's heat to power the system.

Research and Development: Vapor compression technology has been extensively researched and developed over the years, resulting in continual improvements, cost reductions, and advancements in efficiency. Vapor absorption systems, while viable for certain applications and energy sources, have received comparatively less attention in terms of R&D, limiting their widespread adoption.

It's important to note that the suitability of either system for solar energy depends on the specific requirements, scale, and location of the application. In certain niche scenarios where waste heat or low-grade heat is available, vapor absorption systems might offer advantages. However, when considering the overall economic viability and market maturity, vapor compression systems are generally the preferred choice for solar-powered refrigeration and air conditioning.

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