What is Delta T?
“Delta T” refers to temperature differential. We caution our customers to make sure what delta T refers to in each individual calculation. In our performance curves and equations, it can represent several things. For air cooled air conditioners, it can indicate the temperature difference between ambient and enclosure temperatures or the temperature difference between ambient and the cold sink (cold sideheat exchanger). For liquid cooled air conditioners, it can refer tothe temperature difference between cooling fluid and enclosure temperatures or the temperature difference between cooling fluid and the cold sink (cold side heat exchanger). For cold plates, it represents the temperature difference between ambient and cold plate temperature when using air cooled cold plates or the temperature difference between the cooling fluid and the cold plate.
Delta T is becoming one of the standard indicators for acceptable spray conditions. Delta T is calculated by subtracting the wet bulb temperature from the dry bulb temperature. The diagram below relates air temperature and relative humidity to values of Delta T. When applying pesticides, Delta T should ideally be between 2 and 8.
