(2)饱和湿空气 Saturated air) Saturated Air: Dry air+ Saturated water vapor (饱和湿空气:干空气和饱和水蒸汽的混合物。) Saturated air 干空气 饱和湿空气 + T 饱和水蒸气 py=D、(T) 温度一定,不能再加入水蒸气 If the temperature is fixed, no more water vapor it can absorb
(2) 饱和湿空气(Saturated air) 干空气 ＋ 饱和水蒸气 pv ＝ ps (T) T s ps 温度一定，不能再加入水蒸气 If the temperature is fixed, no more water vapor it can absorb. Saturated Air: Dry air+Saturated water vapor (饱和湿空气：干空气和饱和水蒸汽的混合物。) Saturated air 饱和湿空气
(3)从未饱和到饱和的途径 A.(T加水蒸气P b >C C.p、不变,T T Ps 结露 b T露点温度
(3)从未饱和到饱和的途径 T s pv ps A. T 加水蒸气, pv b a C. pv 不变，T a b a d d c B. pv ，T a c D. v a e e 结露 Td 露点温度 B. B. ppv ，T v ，T A. A. T 加水蒸气, pv A. T 加水蒸气, pv A. T 加水蒸气, pv A. T 加水蒸气, pv A. T 加水蒸气, pv A. T 加水蒸气, pv , pv
72湿空气的参数 Properties of Moist Air 1. Pressure of atmospheric air p= pa t py The barometric pressure of atmospheric air vary considerably with altitude as well as with local geographic and weather conditions
7.2 湿空气的参数 Properties of Moist Air p = pa + pv The barometric pressure of atmospheric air vary considerably with altitude as well as with local geographic and weather conditions. 1. Pressure of atmospheric air
500 「107478 101325 500 95461 1000 89875 1500 84.55 2000 79495 2500 74682 3000 70.108 4000 61.640 5000 54020 6000 47.181 7000 4106l 8000 35.600 9000 3071 10000 26.436 12000 19.284 114000 13.786 16000 19632 18000 20000 4.328
-500 107.478 0 101.325 500 95.461 1000 89.875 1500 84.556 2000 79.495 2500 74.682 3000 70.108 4000 61.640 5000 54.020 6000 47.181 7000 41.061 8000 35.600 9000 30.742 10000 26.436 12000 19.284 14000 13.786 16000 9.632 18000 6.556 20000 4.328
The partial pressure of water vapor is also called vapor pressure, 2.干球温度(Dry- bulb temperature) It is the temperature of moist air. The dry-bulb temperature of water vapor and dry air is the same. It is denoted as t' 3露点温度(Dew- point Temperature It is defined as the temperature at which condensation begins when the air is cooled at constant pressure In other words, it is the saturation temperature of water corresponding to the vapor pressure. t d=ta (pu)
⚫ The partial pressure of water vapor is also called vapor pressure. 2.干球温度 (Dry-bulb temperature) It is the temperature of moist air. The dry-bulb temperature of water vapor and dry air is the same. It is denoted as ‘t’ . 3.露点温度(Dew-point Temperature) It is defined as the temperature at which condensation begins when the air is cooled at constant pressure. In other words, it is the saturation temperature of water corresponding to the vapor pressure. ( ) d sat pv t = t