A Simple Accurate Formula for Calculating Saturation Vapor Pressure of Water and Ice

作者：Huang, Jianhua^*

来源：Journal of Applied Meteorology and Climatology, 2018, 57(6): 1265-1272.

DOI：10.1175/JAMC-D-17-0334.1

• CLAUSIUS-CLAPEYRON EQUATION
• APPROXIMATION
• COMPUTATION
• SURFACE

It is necessary to calculate the saturation vapor pressure of water and of ice for some purposes in many disciplines. A number of formulas are available for this calculation. These formulas either are tedious or are not very accurate. In this study, a new formula has been developed by integrating the Clausius-Clapeyron equation. This new formula is simple and easy to remember. In comparison with the International Association for the Properties of Water and Steam reference dataset, the mean relative errors from this new formula are only 0.001% and 0.006% for the saturation vapor pressure of water and of ice, respectively, within a wide range of temperatures from -100 degrees to 100 degrees C. In addition, this new formula yields a mean relative error of 0.0005% within the commonly occurring temperature range (10 degrees-40 degrees C). Therefore, this new formula has significant advantages over the improved Magnus formula and can be used to calculate the saturation vapor pressure of water and of ice in a wide variety of disciplines.

• 出版日期2018-6
• 单位武汉纺织大学