Understanding Refrigerator Coils at the Back

The coils or tubes located at the back of a domestic refrigerator play a crucial role in the refrigeration cycle. They are an essential part of the appliance's cooling system.

Analyzing the Statements about Refrigerator Coils

Let's examine each statement provided in the options to determine which one is incorrect regarding the coils at the back of a domestic refrigerator.

• Statement 1: Carry refrigerant fluid

  Domestic refrigerators use a special fluid called a refrigerant (like Freon, although types have changed over time) to absorb heat from inside and release it outside. The coils circulate this refrigerant. Therefore, this statement is correct.

• Statement 2: Carry chilled water

  Domestic refrigerators typically do not use chilled water circulating through the coils at the back. The coils at the back are where heat is released, so they are usually warm, not carrying *chilled* water. The cooling inside the refrigerator is achieved by evaporating the refrigerant at low pressure inside the freezer/refrigerator compartment, absorbing heat from the air. This statement is incorrect.

• Statement 3: Serve as the condenser

  In the refrigeration cycle, the condenser is the component where the high-pressure, high-temperature refrigerant gas releases heat and condenses into a liquid. The coils at the back of a domestic refrigerator serve this exact purpose. They dissipate the heat absorbed from the inside to the surrounding atmosphere. Therefore, this statement is correct.

• Statement 4: Reject heat to the atmosphere

  As mentioned, the primary function of the condenser coils at the back is to get rid of the heat that was absorbed from inside the refrigerator. They transfer this heat to the air outside the refrigerator, thus rejecting heat to the atmosphere. Therefore, this statement is correct.

Identifying the Incorrect Statement

Based on the analysis, the statement that is incorrect is that the coils at the back of a domestic refrigerator carry chilled water. They carry refrigerant fluid and function as a condenser to reject heat.