Refrigeration – the transfer from place were it is not wanted to a place were it is unobjectionable

Heat – a form of energy that cannot be measured by weight or density but rather by intensity of content

Ref. System Components

Compressor pump – used to raise pressure and super heat refrigerant

Evaporator – heat transfer devise absorbs heat from the load

Condenser – heat transfer devise rejects heat from the system.

Metering Devise – flow control devise (changes pressure temperature ratio)

Applications of Mechanical Ref. Systems

Domestic – household appliances

Residential – home air conditioning

Commercial – grocery stores

Industrial – food processing plants

Air Conditioning

Comfort cooling – cooling for human comfort

Process cooling - cooling for machines

Refrigeration

•  Typical compressor applications

High 40F to 50F

Medium 35F to –5f

Low 0F to –40F

Extra low below –40F (compound or multi stage systems)