Question

Given below are two statements:
Statement (I): Primary function of compressor in a vapour compression refrigeration system is to raise temperature and pressure of the refrigerant vapour.
Statement (II): Condenser converts the refrigerant vapour to its liquid form.

In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are true.
• B. Both Statement (I) and Statement (II) are false.
• C. Statement (I) is true but Statement (II) is false.
• D. Statement (I) is false but Statement (II) is true.

Hint:

Remember the four basic stages of a refrigeration cycle:
1. Compression (Vapor P, T increase)
2. Condensation (Heat rejection, Vapor \(\rightarrow\) Liquid)
3. Expansion (Pressure reduction)
4. Evaporation (Heat absorption, Liquid \(\rightarrow\) Vapor)

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
A vapor compression refrigeration system (VCRS) uses a circulating chemical refrigerant that absorbs and rejects heat during phase transitions.

Step 3: Detailed Explanation:
Let us analyze the functions of both components:
1.

Statement (I): The compressor takes in low-pressure, low-temperature superheated vapor from the evaporator and compresses it.
This mechanical compression increases both the pressure and the temperature of the vapor, turning it into hot, high-pressure gas. Thus, Statement (I) is true.
2.

Statement (II): This high-pressure, high-temperature vapor enters the condenser, where it rejects heat to the cooler ambient air or water.
As heat is removed, the refrigerant undergoes a phase change, condensing from vapor into high-pressure liquid. Thus, Statement (II) is true.

Step 4: Final Answer:
The correct option is 1, which corresponds to "Both Statement (I) and Statement (II) are true."