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Dewpoint temperature, Td, is the temperature at which the water vapor contained in a gas starts to condense when cooled.

露點(diǎn)溫度 (T d ) 是氣體中的 水蒸汽在冷卻過(guò)程中開(kāi)始凝結結露時(shí)的溫度。

Dewpoint is defined as the temperature at which a moist gas is saturated with respect to a plane surface of pure liquid water.

露點(diǎn)被定義為在濕氣體達到飽 和狀態(tài)并在平面表面產(chǎn)生純液態(tài)水時(shí)的溫度 P w = P ws (Td)

Pw is partial water vapor pressure 水蒸汽分壓

• Pws is water vapor ' s saturation pressure. 飽和水蒸汽壓力

• Td is dew point temperature 露點(diǎn)溫度

At this state condensation and evaporation are at an equilibrium and take place at the same rate.

在這種狀態(tài)時(shí)水的凝結和蒸發(fā)達到平衡狀態(tài)并且以相 同的速度進(jìn)行。

• proportional only to the pressure of water vapour (T n , m, A are constants) 只和水 蒸汽壓力相關(guān)

• measurement sensitive to pressure changes 測量對壓力變化非常敏感

Dewpoint is not temperature dependent but only pressure dependent parameter.

露點(diǎn)是只和壓力相關(guān) , 并不和溫度相關(guān) 的一個(gè)參數。