What is a reasonable evaporating temperature for a forced convection air cooling evaporator?

The reasonable evaporating temperature for a forced convection air cooling evaporator is typically lower than the temperature of the air leaving the evaporator, as the primary function of the evaporator is to absorb heat from the air. This heat exchange process cools the air before it is circulated back into the space being cooled.

When considering the correct choice, a reasonable evaporating temperature being the air off the evaporator minus 10K reflects a practical understanding of the temperature difference required to ensure efficient heat absorption and maintain the desired cooling effect. This temperature difference allows for effective heat exchange, ensuring that the refrigerant in the evaporator can evaporate and absorb sufficient heat from the passing air.

In contrast, having the evaporating temperature at the air off the evaporator, at a higher temperature, or plus an additional temperature, would not allow for adequate cooling to take place. It may not provide the necessary temperature differential needed for optimal performance, ultimately leading to inefficiencies in the cooling process.