Re: [TRNSYS-users] dynamicdata function

Hi Amandine

I think there may be a misunderstanding due to the variables names used in the example in the manual, and the variables used in Type107. But you are right, that there is a typo in the manual, it should read:
NX(1) = 2
NX(2) = 3

a DynamicData procedure is included in Type107 code and it seems a bit different that what's described in Trnsys Programmers guide.

Using your call to DYNAMICDATA,
CALL DYNAMICDATA(LU_S1,NX,NVAL,NY,X,Y,INFO,*10)
the variables should contain the following information:

NX = 3 !Number of independent variables
NY = 2 !Number of dependent variables

NVAL(1) = 5
NVAL(2) = 3
NVAL(3) = 5

Please let me know if this solves your problem.
Best regards,

Diego

In a handmade Type, I try to read my own file but DynamicData always give me the wrong solution.

the code is the following:

C GET THE PERFORMANCE DATA FROM THE S1 DATA FILE: FRACTION OF DESIGN CHILLED WATER CAPACITY
C AND FRACTION OF DESIGN COP ARE FUNCTION OF INLET HOT WATER TEMPERATURE, INLET COOLING
C WATER TEMPERATURE AND OUTLET CHILLED WATER TEMPERATURE LEVEL

  NVAL=3
  NY=2
  NX(1)=5

  NX(2)=3
  NX(3)=5
  X(1)=TCHW_T1
  X(2)=TCW_IN
  X(3)=THW_IN
  CALL DYNAMICDATA(LU_S1,NX,NVAL,NY,X,Y,INFO,*10)
  CALL LINKCK('TYPE807','DYNAMICDATA',1,807)
10   IF (ErrorFound()) RETURN 1
  FNCAP=Y(1)
  FNCOP=Y(2)

and data file is (separation = tab):

5.5 6 7 8 9 !Chilled Water Temperature output at previous timestep
24 29.5 31   !Entering Cooling Water Temperature
75 80 85 88 95 !Inlet Hot Water Temperature

0.87671 0.88571  ! Fraction of design capacity and design COP at    5.5 24 75
0.98630 0.88571  ! Fraction of design capacity and design COP at    5.5 24 80
y1 y2    ! Fraction of design capacity and design COP at    5.5 24 85
etc...

Can someone detect the problem..?

thank you for your help,

Amandine LE DENN


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Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706