n> vaporization(气化) ",< w condensate on(凝结) ,= equilibriu m(平衡状态 The equilibrium is called saturation State(饱和状态) The properties at this state is called Saturation Properties. (WE/H 参数) T Ps
wv wc condensati on (凝结） wv wc vaporization (气化） wv = wc equilibriu m (平衡状态） The equilibrium is called Saturation State.(饱和状态） The properties at this state is called Saturation Properties. (饱和 参数） Ts s p
62.2饱和状态 Saturation state 饱和状态:汽化与凝结的动态平衡 At the equilibrium state, the pressure corresponding to only one temperature. that is, Saturation temperature 饱和温度T 一 二一对应 饱和压力p Saturation pressure p=f(7) 放掉一些水,T不变,P、?
6.2.2 饱和状态Saturation state 饱和状态：汽化与凝结的动态平衡 At the equilibrium state, the pressure corresponding to only one temperature. That is, . 饱和温度Ts 饱和压力ps 一一对应 放掉一些水，Ts不变，ps？ Ts ps Saturation temperature Saturation pressure p = f (T)
There is a definite relation betweenps-f(TS p=1.01325ba T=100℃ 青藏p、=0.6bar=T=85.95℃ 高压锅=1.6bar=T:=1132℃
ps=1.01325bar Ts=100 ℃ 青藏ps=0.6bar Ts=85.95 ℃ 高压锅ps=1.6bar Ts=113.32 ℃ There is a definite relation between . ( ) s Ts p = f
623汽化 Vaporization 气化:由液态变成气态的物理过 (不涉及化学变化) Evaporation 蒸发:汽液表面上的汽化 It occurs above the free surface of liquid Boil 沸腾:表面和液体内部同时发生的汽化 It is an intensive vaporization phenomenon occurs in the liquid (气体和液体均处在饱和状态下)
6.2.3 汽化 Vaporization 沸腾：表面和液体内部同时发生的汽化 It is an intensive vaporization phenomenon occurs in the liquid. (气体和液体均处在饱和状态下) 汽化: 由液态变成气态的物理过程 (不涉及化学变化) 蒸发：汽液表面上的汽化 It occurs above the free surface of liquid Boil Evaporation
Evaporation occurs at any temperature and pressure (蒸发可在任何温度和压力下发生 Evaporation rate depends on the free surface arear the temperature the flow rate above eto (蒸发的速度与自由液面表面积,液体温度,液面风速等有关 Boiling can only occur as temperature reaches the saturation temperature corresponding to the specified pressure or the pressure drops below the saturation pressure corresponding to the specified temperature. (沸腾只能当温度达到给定压力所对应的饱和温度或压力降到给定
Evaporation occurs at any temperature and pressure. （蒸发可在任何温度和压力下发生．） Evaporation rate depends on the free surface area, the temperature, the flow rate above, etc. （蒸发的速度与自由液面表面积，液体温度，液面风速等有关． Boiling can only occur as temperature reaches the saturation temperature corresponding to the specified pressure or the pressure drops below the saturation pressure corresponding to the specified temperature. （沸腾只能当温度达到给定压力所对应的饱和温度或压力降到给定 温度所对应的饱和压力时,才能发生)