The correct answer is c) reversed Joule cycle.

Explanation:
The Bell-Coleman cycle is a thermodynamic cycle used in certain refrigeration systems. It is named after Willard Harrison Coleman and Alexander Graham Bell, who were pioneers in the development of refrigeration technology. The Bell-Coleman cycle is based on the reverse of the Joule cycle, with some modifications.

1. Reversed Joule cycle:
The Joule cycle is a thermodynamic cycle that describes the operation of an ideal gas turbine engine. It consists of four processes: isentropic compression, constant pressure heat addition, isentropic expansion, and constant pressure heat rejection. In the reversed Joule cycle, these processes are reversed, meaning that the direction of the energy transfer is reversed.

2. Bell-Coleman cycle:
The Bell-Coleman cycle is a refrigeration cycle that operates in reverse to the reversed Joule cycle. It is used in certain refrigeration systems, particularly in air liquefaction and cryogenic applications. The cycle consists of four processes: compression, cooling, expansion, and heating.

- Compression: The refrigerant is compressed from a low pressure and low temperature state to a high pressure and high temperature state. This process is similar to the isentropic compression in the reversed Joule cycle.

- Cooling: The compressed refrigerant is cooled down to a low temperature through heat exchange with a cooling medium, such as air or water. This process is similar to the constant pressure heat rejection in the reversed Joule cycle.

- Expansion: The cooled refrigerant is expanded through an expansion valve, which reduces its pressure and temperature. This process is similar to the isentropic expansion in the reversed Joule cycle.

- Heating: The expanded refrigerant is then heated to a higher temperature through heat exchange with a heat source, such as warm air or waste heat. This process is similar to the constant pressure heat addition in the reversed Joule cycle.

3. Reversal of energy transfer:
In the Bell-Coleman cycle, the direction of energy transfer is reversed compared to the reversed Joule cycle. In the reversed Joule cycle, energy is extracted from the working fluid in the form of mechanical work, while in the Bell-Coleman cycle, energy is added to the working fluid in the form of heat. This reversal of energy transfer allows the Bell-Coleman cycle to function as a refrigeration cycle.

Therefore, the Bell-Coleman cycle is a reversed version of the Joule cycle with modifications to enable refrigeration.

Bell coleman cycle is also called as reverse bryton or reversed