VILAS BUSINESS SOLUTIONS Refrigeration Engineer Interview Questions, Process, and Tips

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 ...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...read more

An evaporator is a heat transfer device that converts a liquid into a vapor or gas.

• It is used in refrigeration systems to absorb heat from the surrounding environment.

• The liquid refrigerant is evaporated inside the evaporator coil, which causes it to absorb heat from the air or water passing over the coil.

• The evaporator coil is typically made of copper or aluminum and is filled with refrigerant.

• The refrigerant evaporat...read more

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 she...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