[TRNSYS-users] Re : Re: Psychrometrics
Jérôme Deroche
deroche.jerome at cedre-sophia.com
Fri Dec 17 02:08:17 PST 2010
Your answers are right.
Thank you very much
Jérôme DEROCHE
Ingénieur d'études
CEDRE
Tel: 04 92 96 03 77
Port: 06 25 11 21 93
Ophira 1, 1 place Bermond
06560 SOPHIA-ANTIPOLIS
Message original Re : Re: [TRNSYS-users] PsychrometricsDe : David BRADLEY <d.bradley at tess-inc.com>
A : Jérôme Deroche <deroche.jerome at cedre-sophia.com>
Date : 2010-12-16 19:51:05
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,
i'm using a psychrometrics type with dry bulb temperature and absolute humidity ratio in inputs. Pressure input is set to 1 atm.
I have noticed that sometimes there is a difference between the input humidity ratio and the output humidity ratio. The difference ratio is about 1 to 12%.
Could someone explain to me why this difference happens?
Thank you
Jérôme DEROCHE
Ingénieur d'études
CEDRE
Tel: 04 92 96 03 77
Port: 06 25 11 21 93
Ophira 1, 1 place Bermond
06560 SOPHIA-ANTIPOLIS
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-- *************************** 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 at tess-inc.com http://www.tess-inc.com http://www.trnsys.com
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