refrigeration

If you want to know how refrigeration system works – you can get it in brief here

CLASSIFICATION OF REFRIGERATION SYSTEM

Types of Refrigeration

Vapour Compression Refrigeration (VCR): uses mechanical energy

Vapour Absorption Re frigeration (VAR): uses thermal energy

Vapour Compression Refrigeration

Highly compressed fluids tend to get colder when allowed to expand.

If pressure high enough.

Compressed air hotter than source of cooling.

Expanded gas cooler than desired cold temperature.

Lot of heat can be removed (lot of thermal energy to change liquid to vapour).

Heat transfer rate re mains high (temperature of working fluid mu ch lower than what is being cooled)

refrigeration

Evaporator

Low pressure liquid refrigerant in evaporator absorbs heat and changes to a gas

Compressor

The superheated vapour enters the compressor where its pressure is raised

Condenser

The high pressure superheated gas is cooled in several stages in the condenser

Expansion

Liquid passes through expansion device, which reduces its pressure an d controls the flow into the evaporator

Type of refrigerant-

-Refrigerant determine d by the required cooling temperature

-Chlorinated fluorocarb ons (CFCs) or freons: R-11, R-12, R-21, R-22 and R-502

Choice of compressor, design of condenser, evaporator determined by

Refrigerant

Required cooling

Load

Ease of maintenance

Physical space requirements

Availability of utilities (water, power)

Vapour Absorption  Refrigeration-





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