﻿ 000081_Calculation of Absolute Temperature,saturated vapor pressure of water or ice,Saturation humidity ratio(weight,volume),dry-bulb temperature-Absolute humidity of saturated air.

# Calculation of Absolute Temperature,Saturated vapor pressure(Ice at t＜0℃),Saturation humidity ratio ＆ Dry-bulb temperature-Absolute humidity of saturated air Graph.

## Keyword

Sonntag Equation,Absolute Temperature,Saturated vapor pressure of water or ice,Absolute humidity of saturated air,dry-bulb temperature-Absolute humidity of saturated air Graph.

## Reference

・『JIS Z8806 湿度-測定方法』
・『湿度と蒸発』（上田政文）
・『建築設備設計マニュアル　第三版　Ⅰ空気調和編』（社団法人建築設備技術者協会）
・『理科年表　平成19年2007』（国立天文台編）.

## Remarks

・T=t+273.15.
・Saturated vapor pressure(kPa)={a×T^(-1)}＋{b}＋{c×10^(-2)×T}＋{d×10^(-5)×T^2}＋{e×ln(T)} Sonntag Equation.
・Absolute humidity of saturated air(kg/kg(DA))=0.622×Saturated vapor pressure(kPa)/(atmospheric pressure(kPa)-Saturated vapor pressure(kPa)).
・Absolute humidity of saturated air(g/m^3)=804×Saturated vapor pressure(kPa)/((1+0.00366×Dry-bulb temperature)×atmospheric pressure(kPa)).

## History

・2014/08/06：layout change.
・2009/03/15：Moved from www.am-consulting.co.jp to here.