Refrigeration Engineer Interview Questions and Answers

Subcoolers are used in refrigeration systems to cool the refrigerant below its saturation temperature.

• Subcoolers remove any remaining heat from the refrigerant after it has been condensed.

• This ensures that the refrigerant is in a liquid state before entering the expansion valve.

• Subcoolers improve the efficiency of the refrigeration cycle and increase the cooling capacity of the system.

• Examples of subcoolers include shell and tube subcoolers, plate heat exchanger subcoolers, a...read more

Superheat can be controlled by adjusting the refrigerant flow rate or by adjusting the evaporator pressure.

• Adjust refrigerant flow rate

• Adjust evaporator pressure

• Use expansion valves to regulate refrigerant flow

• Use pressure regulators to control evaporator pressure

• Ensure proper insulation and airflow in the system

• Regularly maintain and clean the system

Refrigeration cycle is a process of removing heat from a low-temperature reservoir and transferring it to a high-temperature reservoir.

• The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• The refrigerant is compressed by the compressor and then condensed in the condenser, releasing heat.

• The high-pressure refrigerant then passes through the expansion valve, where it expands and cools.

• The cooled refrigerant then enters the evaporato...read more

Condenser is a device that converts refrigerant vapor into liquid by removing heat from it.

• Condenser receives high-pressure, high-temperature refrigerant vapor from the compressor.

• Heat is removed from the refrigerant vapor by either air or water.

• As the refrigerant vapor loses heat, it condenses into a high-pressure liquid.

• The liquid refrigerant then flows to the expansion valve or metering device.

• Examples of condensers include air-cooled, water-cooled, and evaporative condens...read more

Refrigeration relative

• Refrigeration relative refers to the relationship between different components and systems in a refrigeration system.

• It involves understanding how each component works together to achieve the desired cooling effect.

• Examples of refrigeration relatives include the compressor, condenser, evaporator, expansion valve, and refrigerant.

• Knowledge of refrigeration relatives is essential for troubleshooting and maintaining refrigeration systems.