Refrigeration: It is
defined as the process of removing Heat form a
body(substance). Refrigeration
process maintains the temperature of the body, less than the surrounding
temperature. Refrigeration is achieved using a median called Refrigerant.
Types of
Refrigeration:
Air cooled
refrigeration system
Ice cooled
refrigeration system
Vapor
Compression refrigeration system
Vapour Absorption
refrigeration system
Refrigerant: It is a
material (commonly a fluid) used in heat pumps and refrigeration cycles. The purpose
of refrigerant is to absorb heat and maintains less temperature.
It acts as a
heat carrier which changes from gas to liquid and then liquid to gas in the
refrigeration cycle during refrigeration process.
Common Refrigerants
are:
CO2
Ammonia
Sulpher-di-oxide
Measurement
of Refrigeration:
The cooling
effect produced by melting of One ton of Ice in 24Hrs is called refrigeration
effect. And this is measured as “Commercial Ton of refrigeration”.
Denoted by TR.
The heat removal from ice is @210kJ/kg
Denoted by TR.
The heat removal from ice is @210kJ/kg
Generally
considered as 210 kJ/min
Refrigeration
Effect: The amount
of cooling effect produced by refrigeration system/machine is known as
refrigeration effect. It is denoted by N.
Work
Supplied: the amount
of energy supplied for refrigerating is termed as Work Supplied. It is denoted
by W.