[TRNSYS-users] rel. humidity type 56: where is the difference

["Uwe Meinhold" <uwe.meinhold@mailbox.tu-dresden.de>]

 

Dear TRNSYS User

 

I checked a simple steady state problem in trnsys15.

I have a room: 50 m^3 with an air change rate of 0.7 per hour and a source of 0.3 kg/h water. The outside and inside temperature is 20 °C and the outside relative humidity is 0 (or 0.000000001%). 

 

The result of TRNSYS type 56 is 49.0263 %

 

but the result of my calculation is 49.572% (see enclosed pdf file).

 

 

The differences comes with the source inside the room. That means I go confirm with the psych - routine.

 

Now my question is what makes the difference?

 

Thanks in advance

 

 

 

 

 

Attachment: relhum.pdf
Description: Adobe PDF document