[TRNSYS-users] Error message - unit inconsistency

[Matt Duffy]

Dear Raksit, 

I have a couple of comments about this. First of all,
it is difficult to see the exact error without seeing the listing
(*.lst) file. Also, when converting humidity ratio to %RH, simply use
the Type33 component which calls the Pyschrometric subroutine to
calculate the moist air properties. However, I would recommend that you
simply use Type642 diverter from the TESS Hydronics Library which has a
%RH input. 

Best regards, 

Matt Duffy 

On 2013-03-15 03:33, Raksit
Pattanapitoon wrote: 

> Dear all, 
> I have been running into this
error message: TRNSYS MESSAGE 25 : ERROR IN DETERMINING THE UNIT NUMBER
SPECIFIED IN AN EQUATION. TO REFERENCE AN OUTPUT IN A TRNSYS EQUATION,
BOTH THE UNIT NUMBER AND OUTPUT NUMBER MUST BE ENCLOSED BY SQUARE
BRACKETS AND SEPARATED BY A COMMA. FOR EXAMPLE [1,2] 
> 
> I think this
probably comes from the Equation I use to convert between humidity ratio
and %RH (if the error message means something else please let me know).
The conversion is necessary because the moist air flow mixer (type 11c)
and moist air tee-piece (type 11g) that I'm using need humidity ratio as
input/output but my TRNBuild component outputs %RH. Even though I use
Equation to change the value, the unit is not changed and thus I am
still connecting %RH output to humidity ratio input which causes the
error. Does anyone know a way around this? 
> Thank you for your help in
advance! 
> Best, 
> Raksit 
> -- 
> Raksit Pattanapitoon
> 
> Cornell
University Mechanical Engineering 
> B.S. 2012, M.Eng. 2013
 
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