Question

Which of the following is not a function of the compressor in a refrigeration system?

A) draw low-pressure refrigerant out of the evaporator.
B) draw low-temperature refrigerant out of the evaporator.
C) lower the temperature of the refrigerant.
D) maintain sufficiently low pressure in the evaporator.
E) raise the pressure of the refrigerant.

Answer 1

The compressor in a refrigeration system does not lower the temperature of the refrigerant; that function is achieved as the refrigerant passes through the expansion valve after being condensed. The compressor's actual functions include raising the refrigerant's pressure and temperature, and drawing low-temperature, low-pressure refrigerant out of the evaporator.

Step-by-step explanation:

The function of the compressor in a refrigeration system that is not correct is as follows: it does not lower the temperature of the refrigerant. Instead, the compressor's main functions are to:

1. Draw low-pressure refrigerant out of the evaporator.
2. Draw low-temperature refrigerant out of the evaporator.
3. Maintain sufficiently low pressure in the evaporator.
4. Raise the pressure of the refrigerant.

The electrically driven compressor actually raises the temperature and pressure of the refrigerant. It then forces the now high-temperature, high-pressure gas into the condenser coils. Inside the condenser coils, heat transfer to the surrounding space occurs, and the refrigerant condenses to a liquid. This liquid is then passed through an expansion valve where it cools down as it returns to the evaporator coils.