[TRNSYS-users] convergence problems because of high ventilation heat flux

[Arian Bahrami]

Dear Karol
As you said, you have to change the time step to smaller values and see if the problem is resolved or not as the first option.

Arian 
Sent from Yahoo Mail for iPhone


On Tuesday, August 16, 2022, 5:51 PM, karol.bandurski--- via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:

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Dear Experts.

  

We get convergence problem in Type 56. According to our investigation source of error is sudden increase of ventilation flow in our schedule and ventilation air temperature about 3 K lower then room air temperature.

We would like to keep this control schedule and the same time avoid convergence problem.

  

So far we have increase indoor air heat capacity in zones (five times), it help a bit.

  

Do you  have any other ideas what we could do?

Should we change something in Control Cards?

  

Best,

Karol 

  

---------------------------------------------------------------------------

Karol BANDURSKI Ph.D, Assistant Professor    

Faculty of Environmental and Energy Engineering 

Division of Heating, Air Conditioning and Air Protection 

Poznan University of Technology

https://www.researchgate.net/profile/Karol_Bandurski

***

dr inż. Karol BANDURSKI, Adiunkt

Wydział Inżynierii Środowiska i Energetyki

Zakład Ogrzewnictwa, Klimatyzacji i Ochrony Powietrza

Politechnika Poznańska

  
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