3. WHAT IS COMPRESSOR?
Compressors are mechanical devices that compresses gases. It is
widely used in industries and has various applications
4. HOW THEY ARE DIFFERENT FROM PUMPS?
Major difference is that compressors handles the gases and pumps handles the
liquids.
As gases are compressible, the compressor also reduces the volume of gas.
Liquids are relatively incompressible.
5. WHY WE NEED?
Compressors have many everyday uses, such as in :
Air conditioners, (car, home)
Home and industrial refrigeration
Hydraulic compressors for industrial machines
Air compressors for industrial manufacturing
7. POSITIVE DISPLACEMENT
Positive-displacement compressors operate by forcing a fixed
volume of fluid from the inlet pressure section of the compressor into
the discharge zone of the compressor.
9. SINGLE ACTING COMPRESSOR
A Single Acting Reciprocating (piston) compressor consists of a single
cylinder which only takes in and discharges fluid at one end.
10. DOUBLE ACTING COMPRESSOR
A Double acting unit also has only one cylinder but it is piped up to
take in and discharge fluid at both ends.
11. INTERCOOLER IN MULTI-STAGE
An intercooler is any mechanical device used to cool a fluid, including liquids or
gases,
Between stages of a multi-stage heating process, typically a heat exchanger
that removes waste heat in a gas compressor
12. Diaphragm Type
A diaphragm compressor is a variant of the classic reciprocating compressor.
The compression of gas occurs by means of a flexible membrane, instead of an
intake element.
15. ADVANTAGES
Oil-free compression due to hermetic separation between gas and
oil chamber
Abrasion-free compression due to static seals in the gas stream.
Automatic shutdown in case of a diaphragm failure prevents
damage
Discharge pressure up to (3,000 bar)
18. SCROLL TYPE COMPRESSOR
A scroll compressor operating in reverse is known as a scroll expander, and can
be used to generate mechanical work from the expansion of a fluid, compressed
air or gas.
21. ADVANTAGES OF SCROLL COMPRESSORS
The absence of pistons for gas compression enables scroll compressors to reach
100% volumetric efficiency, leading to reduced energy costs.
Re-expansion losses, a typical feature of each piston stroke encountered in
reciprocating models, are eliminated. In addition, valve (ports) losses are eliminated,
22. ADVANTAGES.....
since suction and discharge valves (ports) do not exist.
Sroll compressors are considerably quieter in operation compared to
other types of compressors, like for example reciprocating type ones.
23. DISADVANTAGES OF SCROLL COMPRESSORS
Being fully hermetic, perhaps the biggest disadvantage of scroll compressors is that
they are generally not easily repairable. They cannot be disassembled for
maintenance.
ABRATION............
24. APPLICATIONS
Since their introduction, scroll compressors have been successfully used in applications
involving food and fruit refrigeration, truck transportation, marine containers as well
as residential and small to medium scale commercial air-conditioning applications.
25. LIQUID RING TYPE
They are typically used as a vacuum pump but can also be used as a gas
compressor.
The function of a liquid ring pump is similar to a rotary vane pump, with the
difference being that the vanes are an integral part of the rotor.
28. ADVANTAGES
Almost all gases and vapours are compressed, even those containing dust and
liquids.
there is only a very slight rise in the temperature of the gas
there is a high level of reliability in service with a minimum of maintenance
required
