[TRNSYS-users] Psychometrics problem

[jeannieboef]

most models have an option to take either absolute or relative  
humidity as the input. one of my common mistakes is to specify the  
humidity mode one way and to connect the inputs for the other way.

Sent from my iPhone

On 03.12.2012, at 18:39, David BRADLEY <d.bradley at tess-inc.com> wrote:

> Michael,
>   You need to connect the pressure as well. It is surprising that  
> you always get the warning. I would understand if you get that  
> warning for some timesteps (maybe even enough timesteps to go  
> over     the allowable number of warnings in a simulation. However,  
> if you get that warning at every single timestep, there might be  
> something else wrong.
> Regards,
>  David
>
>
> On 12/3/2012 05:39, Michael Diekerhof wrote:
>> Dear all,
>>
>> I´m using type 112 as a fan for an air-Source heat pump (type401).
>>
>> Between Type 15(weather) and type 112 i made the following  
>> connections:
>>
>> Dry bulb temperature => Inlet temperature
>> Humity ratio => Inlet air humidity ratio
>>
>> But unfortunetaly I do always receive the following warning which  
>> results in an Error:
>>
>> "The referenced UNIT 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"
>>
>> Does anyone has a suggestion to solve this problem ?? I appreciate  
>> any idea :)
>>
>> Best,
>> Michael
>>
>>
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>
> -- 
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
>
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> d.bradley at tess-inc.com
>
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