What are the reference evaporation and condensing temperatures for AIR cooled air conditioning compressors?

The reference evaporation and condensing temperatures for air-cooled air conditioning compressors are critical for proper system sizing and performance calculations. The correct selection indicates evaporation at 45 °F and condensing at 130 °F, which align with typical values used in industry standards and practices for air conditioning systems.

The evaporation temperature represents the temperature at which the refrigerant absorbs heat from the indoor environment, while the condensing temperature is where the refrigerant releases heat outdoors. Selecting temperatures like 45 °F for evaporation and 130 °F for condensing effectively reflects the operational conditions under which many air-cooled systems efficiently function.

In contrast, the other options present temperatures that deviate from what is commonly accepted. Lower evaporation temperatures could lead to inefficiencies in the system, while excessively high condensing temperatures could indicate potential issues with heat rejection, reliability, or material limitations within the compressor and its components. Hence, option B represents a well-balanced approach for optimal air conditioning performance.