[TRNSYS-users] type 551

[giovanni nurzia]

David,
I carefully checked the documentation before posting.
 
If I have a vertical wall, looking at Figure 6 at page 551.5, I would set Parameter(7), Beta_field, equal to 0.
Then I get an error in the simulation. ("An illegal PARAMETER value has been reported by the model. The model has reported that Parameter 7 is the problem..")
 
This doesn't surprise me, as in the code:
 
WallSlope = Parameter(7) = 0
FieldSlope = 90 - WallSlope = 90, which in radians is 1.57
IF (FieldSlope.GT.1.5d0)) CALL TYPECK(4,INFO,NI,7,0) !!
 
What`s wrong?
Thanks, Giovanni

 


Date: Wed, 11 Feb 2009 15:00:38 -0600
From: bradley at tess-inc.com
To: giovn at hotmail.com
CC: trnsys-users at cae.wisc.edu
Subject: Re: [TRNSYS-users] type 551

Giovanni,
  Please refer to the ..\Trnsys16_1\Tess Models\Documentation\Green Building Library\Type551.pdf for some diagrams that explain the angle definitions. As for the source code, the angles are converted to radians so the limits that you are seeing are limitations on radians, not on degrees.
Kind regards,
 David


giovanni nurzia wrote: 


Dear all,

following type 551 documentation I would set for the case depicted in the attached figure:

Array configuration: 2
Row slope: alpha + beta
Field slope: beta

But looking at the source code:
- Row slope seems to be considered only referring to the horizontal
- It is requested not to have (FieldSlope.GT.RowSlope), which I would get because for ConfigMode=2 fieldslope is calculated as (90-beta)
- Moreover It seems that I can´t have beta equal to 0, as it is requested not to have (FieldSlope.GT.1.5d0). What about a vertical wall?

Can you give me some suggestions?

Thanks,

Giovanni Nurzia



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