[TRNSYS-users] Re : Re: Psychrometrics

["Jérôme Deroche" <deroche.jerome@cedre-sophia.com>]

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] Psychrometrics

De : David BRADLEY <d.bradley@tess-inc.com>
A : Jérôme Deroche <deroche.jerome@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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