What is the role of the compressor in a refrigeration system?

• A. To cool the refrigerant
• B. To raise the pressure and circulate the refrigerant
• C. To remove superheat from the refrigerant
• D. To condense the refrigerant vapour

Answer: (B)

The role of the compressor in a refrigeration system is to raise the pressure and circulate the refrigerant. The compressor serves as a vital component by taking in low-pressure refrigerant vapor from the evaporator, compressing it, and then discharging it at a higher pressure to the condenser. This pressure increase is essential for ensuring that the refrigerant flows through the system efficiently and transitions from one state to another effectively.

As the refrigerant is compressed, its temperature also increases, making it suitable for heat exchange in the condenser where it releases heat to the surroundings and condenses into a liquid. This action is fundamental for maintaining the refrigeration cycle, which relies on the cycle of evaporation and condensation to transfer heat from the refrigerated space to the outside environment.

While other components in the system play roles in cooling, removing superheat, and condensing the refrigerant vapor, the specific job of raising the pressure and facilitating circulation is uniquely essential to the compressor's function in ensuring the efficiency and effectiveness of the refrigeration system.