[TRNSYS-users] Humidity capacitance

[David BRADLEY]

Ayesha,
   The literature I have seen suggests that humidity capacitance 
multipliers typically range from about 5 to 15. The value is a 
multiplier on the humidity capacitance of the air in the zone. If you 
have set a value of 5 then you're telling Type56 that the zone can 
absorb 5 times as much moisture as can be absorbed by the air in the 
zone. If you increase the value then your zone's humidity ratio will 
change more slowly. The humidity ratio will not necessarily increase 
overall. If you are concerned about the humidity level then check to 
make sure that you are applying a reasonable amount of outdoor air 
ventilation to your zones and also make sure that you have accounted for 
latent energy gains in the zone not only from people but from other 
sources as well.
kind regards,
  David


On 06/14/2015 06:34, Ayesha Mohammed Al Qubaisi wrote:
>
> Dear all,
>
> I get very low humidity ratio when I run TRNSYS for building.
>
> Does that have any relation with humidity capacity value inside TRNbuilt?
>
> I set it as 5. Should I increase it?
>
> Thanks and regards,
>
> Ayesha
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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