ITS-90 FORMULATIONS FOR VAPOR PRESSURE, FROSTPOINT TEMPERATURE, DEWPOINT TEMPERATURE, AND ENHANCEMENT FACTORS IN THE RANGE -100 TO +100 C
ITS-90 FORMULATIONS FOR VAPOR PRESSURE, FROSTPOINT TEMPERATURE, DEWPOINT TEMPERATURE, AND ENHANCEMENT FACTORS IN THE RANGE -100 TO +100 C
复制标题
ITS-90 配方适用于 -100 至 100 C 范围内的蒸气压、霜点温度、露点温度和增强系数
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Bob Hardy
中科院分区：
文献类型：
--
作者：
Bob Hardy
随着 ITS-90 温标的变化，需要新的温度相关方程来预测水和冰的饱和蒸汽压、水和冰的增强系数、霜点温度和露点温度。基于先前温标的国际公认公式被视为蒸气压和增强因子的自洽数据集，被选为初始定义方程。这些公式与定义两个温标之间温差的公式相结合，用于计算与 ITS-90 温标一致的新数据集。然后将这些新数据集拟合到原始形式的方程中，产生与熟悉的蒸气压和增强因子方程相兼容的新 ITS-90 系数。此外，所得的蒸气压方程用于产生一组逆近似方程，以在蒸气压已知时得出霜点和露点温度。给出了所得系数、方程以及产生它们的转换方法。
With the change in the temperature scale of ITS-90, new temperature dependent equations were required which predict saturation vapor pressure over water and ice, enhancement factor over water and ice, frostpoint temperature, and dewpoint temperature. Internationally recognized formulas based on the previous temperature scale, viewed as self- consistent data sets for vapor pressures and enhancement factors, were chosen as initial defining equations. These formulas, coupled with those defining the temperature difference between the two scales, were used to compute new data sets consistent with the temperature scale of ITS-90. These new data sets were then fitted to equations of the original form, yielding new ITS-90 compatible coefficients to the familiar vapor pressure and enhancement factor equations. In addition, the resulting vapor pressure equations were used to produce a set of inverse approximating equations to yield frostpoint and dewpoint temperatures when the vapor pressure is known. The resulting coefficients, equations, and the conversion methods that produced them are presented.