# 我们身边的STEM 02：空气温湿度之水的饱和蒸汽压及其计算函数

in cn-stem •  last year  (edited)

• 绝对湿度（absolute humidity），就是空气中的水汽密度，指单位容积空气中含有水蒸气的质量，以g／m3为单位。
• 相对湿度（ relative humidity）用RH表示。是指在一定温度时，空气中的实际水蒸气含量与饱和值水蒸气含量之比，用百分比表示单位。也可以说是空气中的绝对湿度与同温度和气压下的饱和绝对湿度的比值。

float satPrCalcu(float temp)
//temp in degC, Pr in KPa
{

float tmpSatPr;

tmpSatPr = 6.1121_exp(17.62_temp/(243.12+temp)); //KPa
return(tmpSatPr);
}

，谢谢啦~

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