[TRNSYS-users] pb while creating a type

[ewen raballand <ewen.raballand@gmail.com>]

Dear users,

I'm writing a user Type for trnsys and I' facing a problem. 
Xe is an input of the type (outside relative humidity).
Xsouffl is an output and can be equal to 0 or to Xe while another condition is equal to 0.

Here, the condition is equal to 0 and Xsouffl should be equal to Xe or to 0 which is fast the case...
You can see in the table below, a move back of one time step between the value of Xe and the value of Xsouffl. And sometimes the move back disapears. I didn't found any rules and I don't know where this problem could come from.

 

TIME	Xsouffl c	Xe
1	0	0.00625815
2	0	0.00617362
3	0	0.0061206
4	0	0.00613734
5	0	0.00612341
6	0	0.00606683
7	0	0.00607641
8	0	0.00612489
9	0.00612489	0.00612833
10	0.0063213	0.0063213
11	0.0064191	0.0064191
12	0.0064191	0.00654528
13	0.00654528	0.0066564
14	0.0066564	0.00674369
15	0.00674369	0.00669912
16	0.00669912	0.00670094
17	0.00670094	0.00660211
18	0.00660211	0.00650828
19	0.00650828	0.00650828
20	0.00650828	0.00650134
21	0.00650134	0.00637111
22	0.00637111	0.00636302
23	0.00627747	0.00627747

 Here is the fortran code concerning Xsouffl :

    If (Qsouffl.GT.(0)) then

        if((signalBF.EQ.(1)).and.(Trec_postvent>Tsouffl)) then
            If(Xfr<Xext) then
                Xsouffl = max((Xfr-Xext)/(T_point_froid-Trec_postvent)*Tsouffl+(T_point_froid*Xext-Xfr*Trec_postvent)/(T_point_froid-Trec_postvent),Xfr)
            else
                Xsouffl = Xext
            endif
        else
            Xsouffl = Xext
        endif
    
    else
            Xsouffl = 0

    Endif


Do you have any idea ?

Best,

Ewen