[TRNSYS-users] Problem With Type 88

[Diego A. Arias]

Dear Adrien,

This problem may be caused by the order in which the components are 
being called. Go to 'Simulation cards', tab 'Component order', and 
reorganize the component order so it follows the natural flow of 
information:
- Type109
- Type33
- Type88.
You can just click and drag the components to rearrange them in the 
desired order.
If this solution does not work, please feel free to send me your project 
files.
Best regards,

Diego

Adrien JEZEQUEL wrote:
> Dear Trnsys Users,
>
> I have convergence problem with Type 88 when I connect the Input 2 
> "Humidity ratio of ventilation air".
>
> In my program, the external air humidity ratio is obtained after 
> connecting Type 109-TMY (meteo file) with Type 33e (Psychrometrics: Dry 
> Bulb and Relative Humidity Known). The first output of Type 33e gives 
> the Humidity Ratio. But when I connect this output to Type 88 Input 2 
> (Humidity ratio of ventilation air) an error specify that the maximum 
> number of warning allowed per simulation is exceeded.
>
> The warning message is written below :
>    / The referenced UNIT /(Type 88)/ has called the PSYCHROMETRICS 
> routine witha humidity ratio above the saturation humidity ratio for the 
> given  dry bulb temperature. The air was assumed saturated at the given 
> dry bulb temperature and the humidity ratio set for this condition.
>
> /If I don't use Type 88 Input 2 ( which defines Humidity ration of 
> ventilation air) the simulation runs correctly...
> /
> /Does anyone know why this error appears? May I connect other Type 88 
> inputs, or specify other Type 88 parameters?
>
> Thanks in advance for your help,
>
> Best regards
>
> Adrien
>   

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