The boiling point of refrigerant is the same as which temperature?

• A. Condenser pressure
• B. Compressor suction pressure
• C. Condensing temperature
• D. Evaporator pressure

Answer: (C)

At the heart of this is the idea of saturation temperature: for a given pressure, liquid and vapor are in equilibrium at a single temperature. That temperature is what you call the boiling point when the liquid is boiling, and the condensing temperature when the vapor is condensing. In a refrigeration cycle, the evaporator pressure sets the boiling (evaporation) temperature, while the condenser pressure sets the condensing temperature. Since both are the same saturation temperature on the pressure–temperature curve for the refrigerant, the boiling point is the same as the condensing temperature.