RE: Problem with a Fuel Cell

[Michaël Kummert <kummert@xxxxxxxxxxxxx>]

Dear TRNSYS/HYDROGEMS users,

Fernando received a "personal" answer from the HYDROGEMS developers but may
be some of you are facing the same problem, so here is a copy:

This is indeed a bug in Type170. The code should not be checking the value
of A_PEM in that configuration. 
You can simply comment out the following lines in the code:

C	  AREA=H_PEM*W_PEM
C	  IF((A_PEM.LE.(0.99*AREA)).OR.(A_PEM.GE.(1.01*AREA))) THEN
C	    WRITE(LUW,150) ITYPE,TIME,A_PEM,H_PEM,W_PEM
C	    STOP
C        ENDIF

An update of the HYDROGEMS library will be available in March from the
TRNSYS website. It will include a few bug fixes, including this one.

Regards,

Michaël Kummert

_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert@engr.wisc.edu

SEL Web Site: http://sel.me.wisc.edu 
TRNSYS Web Site: http://sel.me.wisc.edu/trnsys



> -----Original Message-----
> From: owner-trnsys@relay.doit.wisc.edu 
> [mailto:owner-trnsys@relay.doit.wisc.edu] On Behalf Of Fernando Rivas
> Sent: Friday, February 21, 2003 04:38
> To: trnsys@relay.doit.wisc.edu
> Subject: Problem with a Fuel Cell
> 
> 
> Dear TRNSYS users,
> 
> I am trying to simulate a PEM Fuel Cell with IISiBat 3 and I have a 
> problem with TYPE170b of Hydrogems
> (OXMODE=1, TMODE=1, RTCTMODE=2).  I have the following problem:  the 
> A_PEM parameter is "dummy"
> and it can not be modified and this value is provided by 
> H_PEM and W_PEM 
> parameters (H_PEM * W_PEM = A_PEM).
> However if I modify those parameters (H_PEM and W_PEM) and run the 
> simulation I get this error message in the list file:
>                ********ERROR**********
>                TYPE170  TIME =    1.000
>        INVALID PEMFC GEOMETRY:
>        LENGTH AND/OR HEIGHT NOT IN AGREEMENT WITH AREA!
>        A_PEM =  232.00[cm2]
>        H_PEM =   16.00 cm
>        W_PEM =   16.00 cm
>                SIMULATION 'STOPPED'
>                ***********************
> 
> If A_PEM can not be modified (it has a value by default of 
> 232.00 [cm2] 
> always), How can I change the A_PEM value
> (in example 16.00*16.00 = 256.00 [cm2])?
> 
> Thank you in advance
> Fernando Rivas
>