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Saturated vapor temperature

Values for calculation

$D$
$p$ $\mathrm{Pa}$

Calculation

Saturated vapor temperature

$\text{if }\ p\le 16529000$
$$T_{SV}=\cfrac{650.17534844798+D-\left[\left(650.17534844798+D\right)^2-4\cdot\left(-0.23855557567849+650.17534844798\cdot D\right)\right]^{0.5}}{2}-273.15$$
$\text{else}$
$$T_{SV}=572.54459862746+\left[\left(p/1000000-13.918839778870\right)/0.0010192970039326\right]^{0.5}-273.15$$