Jérôme, What is most likely happening is that at a pressure of 1atm, your combination of the dry bulb temperature and the absolute humidity ratio are on the wrong side of the saturation line. Since that is physically impossible, the psychometric routine keeps your dry bulb temperature and resets the absolute humidity ratio to the value it would be if the relative humidity were 100%. Best, David On 12/16/2010 04:21, wrote: Hello, -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |