[TRNSYS-users] Stratification and Radiation in TRNSYS

[Łukasz Wątły]

Dear Christoph,

Thank you very much for your kind reply.

As I have read the positions recommended by you, I wonder if it is
possible, by using only TRNSYS 17, to create two adjacent zones on top of
each other in each room? If it is possible, can we have 4 nodes for
stratification then?

Best regards,
Lukasz

2018-04-25 18:16 GMT+02:00 hotline via TRNSYS-users <
trnsys-users at lists.onebuilding.org>:

> Dear Lukasz,
>
>
>
> for stratifications you can use coupling. In Trnsys 17 you can only
> connect two airnodes within a zone. In Trnsys18 up to 6 airnodes can be
> coupled. The airflow between airnodes is a user input. Please have a look
> into manual 05-MultizoneBuilding: 5.2.4.10. Coupling between airnodes of
> same zone (T17) or  5.2.7.10. Coupling between airnodes (T18)
>
>
>
> In Radiation Modes of Thermal Zone you can set a Solar to air factor.
> Please have a look into manual 05-MultizoneBuilding: 5.2.4.12. Radiation
> Modes (T17) or 5.2.7.12. Zone Radiation Modes (T18)
>
>
>
> The solid gets the heat from the source of heat by longwave radiation
> (Depends on the model you are using. Please have a look int
> o05-MultizoneBuilding: 5.2.4.12. Radiation Modes (T17) or 5.2.7.12. Zone
> Radiation Modes (T18)) and indirectly also by convection/heat conduction.
>
>
>
> Regards,
>
> Christoph
>
>
>
> *Von:* TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org> *Im
> Auftrag von *Lukasz Watly via TRNSYS-users
> *Gesendet:* Montag, 23. April 2018 16:07
> *An:* trnsys-users at lists.onebuilding.org
> *Cc:* Łukasz Wątły <lukaszwatly92 at gmail.com>
> *Betreff:* [TRNSYS-users] Stratification and Radiation in TRNSYS
>
>
>
> Dear All,
>
> I am writing to you with some questions that appeared while working on the
> model in TRNSYS. I am preparing a model of 3-storey building with
> low-temperature floor and ceiling heating installed.
>
> I am interested in doing the vertical stratification on each and every
> floor of this building, meaning that I would like to have at least 4
> different nodes on the given floor. Is it possible to do the stratification
> in this way with TRNSYS? If so, how could I approach it?
>
> Next problem regards the aspect of radiation. As each air node represents
> each zone, the air normally does not receive any radiation heat, but the
> solid does. However, in the tutorial it is mentioned that air node receives
> heat radiation. My question is how does it happen in more details?
>
> Lastly, if I have the solid between two air nodes, how can this solid get
> the heat from source of heat directly by radiation? How does it influence
> the air nodes?
>
> I would be grateful if somebody could share his/her knowledge. Thank you
> in advance for your help.
>
>
>
> I look forward to hearing from you.
>
>
>
> Kind regards,
>
> Lukasz Watly
>
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>
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