The first function the condenser must perform is to ___ the refrigerant before condensing can occur.

The first function the condenser must perform is to ___ the refrigerant before condensing can occur.

• A. De-superheat
• B. Condense
• C. Subcool
• D. Vaporize

Answer: (A)

The main idea here is that the condenser handles refrigerant that arrives as a hot, high‑pressure vapor from the compressor. The first job is to de-superheat it—remove the extra sensible heat until the vapor reaches the condensation temperature for that pressure. Only after the vapor is cooled to the saturation point can it begin to condense, turning into a liquid as latent heat is removed. Subcooling comes after condensation to push the liquid below its saturation temperature for stability and better performance. So de-superheat is the essential first step because condensation cannot start until the vapor is cooled down to the condensation point.

The main idea here is that the condenser handles refrigerant that arrives as a hot, high‑pressure vapor from the compressor. The first job is to de-superheat it—remove the extra sensible heat until the vapor reaches the condensation temperature for that pressure. Only after the vapor is cooled to the saturation point can it begin to condense, turning into a liquid as latent heat is removed. Subcooling comes after condensation to push the liquid below its saturation temperature for stability and better performance. So de-superheat is the essential first step because condensation cannot start until the vapor is cooled down to the condensation point.