The Bell-Coleman cycle is also known as:

Concept:

• Bell Coleman cycle is also known as Reversed Brayton cycle or Reversed Joule cycle
• The working fluid of the Bell Coleman refrigeration cycle is Air.
• This system of refrigeration is used for Air Craft refrigeration and it has light weight.

where

1. Process 1 2: isentropic compression
2. Process 2 3: constant pressure heat rejection
3. Process 3 4: isentropic expansion
4. Process 4 1: constant pressure heat absorption 

Air Refrigeration System and BellColeman Cycle or Reversed Brayton Cycle:

• In the air refrigeration system the air is taken into the compressor from the atmosphere and compressed.
• The hot compressed air is cooled in a heat exchanger up to the atmospheric temperature (in ideal conditions).
• The cooled air is then expanded in an expander. The temperature of the air coming out from the expander is below the atmospheric temperature due to isentropic expansion.
• The lowtemperature air coming out from the expander enters into the evaporator and absorbs the heat. The cycle is repeated.