How is monthly design dry bulb and mean coefficient wet bulb temperatures calculated?
Answers
Dry-bulb temperature corresponding to 0.4, 2.0, 5.0, and 10.0% cumulative frequency of occurrence for indicated month, °C; mean coincident wet-bulb temperature, °C.
Wet-bulb temperature corresponding to 0.4, 2.0, 5.0, and 10.0% cumulative frequency of occurrence for indicated month, °C; mean coincident dry-bulb temperature, °C.
Dry Bulb Temperature (DB, db, DBT, dbt) is the temperature registered by an ordinary thermometer. db represents the measure of sensible heat, or the intensity of heat.
Wet Bulb Temperature (WB, wb, WBT, wbt) is the temperature registered by a thermometer whose bulb is covered by a wetted wick and exposed to a current of a rapidly moving air having a velocity of around 5 m/s. WB is measured by a sling psychrometer which has a set of dry and wet bulb thermometers. The psychrometer is whirled at such revolutions per second that the velocity of the bulb will be 5 m/s approx (in still air).