[TRNSYS-users] Mechanical ventilation strategies using TRNSYS and CONTAM

[David BRADLEY]

Meghana,

  I have far more experience using Type97 with Type56 than Type98. 
Type97 is an older, simplified version of CONTAM. However, I think that 
the idea is basically the same between the two.

  The way I handle this situation is to add a "simple air handler" in 
CONTAM. I then define the locations of the supplies and returns in 
CONTAM and associate them all with whatever name I gave the air handler. 
Once the *.air file is generated, the flow rates and temperatures into 
and out of the supplies and returns will show up in the input/output 
list. I realize that it is primarily in the *.air file that Types97 and 
98 differ.

kind regards,

  David


On 10/16/2020 09:44, Kulhalli, M.S. via TRNSYS-users wrote:
>
> Hello TRNSYS/CONTAM users,
>
> I am working on the development of a double skin façade system and 
> possibilities of harvesting thermal energy from the cavity. I have 
> been able to create simpler versions of this system in a TRNSYS model 
> (using natural ventilation mode) and this worked well in combination 
> with CONTAM using Type56 and Type98.
>
> One of the usage strategies involves installing a fan in the cavity 
> for forced ventilation and eventually, I want to increase the 
> complexity to also allow coupling of the DSF cavity air to an air 
> sourced heat pump (for use in building ventilation purposes). It could 
> then involve modulating the flow rate based on, for example, the 
> temperature conditions. However, since the airflow and the thermal 
> models are ‘separately’ dealt with in CONTAM and TRNSYS respectively, 
> the flexibility I’m able to achieve with using TRNSYS components for 
> ventilation (Fans in Type 147 and ASHP in Type 119a) and modulation 
> (using control signals or equations) does not extend to CONTAM. The 
> best I could do was add a constant mass or volumetric flow rate fan in 
> CONTAM, which I could not control from within TRNSYS, if I would like 
> to modulate the flow rates based on certain conditions.
>
> Does anyone have any suggestions or success stories in making this 
> coupling possible?
>
> Best regards,
>
> Meghana Kulhalli
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
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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