[TRNSYS-users] trnflow error

[Long Le-Van]

Dears,

Could anyone can tell me why trnflow solver has the problem of the convergence when the building zone heating type has a high radiative part, please?
For example, I have a one-zone building with

  *   a heating type of 9000 kJ/h and radiative part of 0.9, the zone temperature is set at 20 °C

                                                     CR_001                               DS_001

  *   trnflow network with EN_01        -->           ZONE_01             -->           EN_02

[cid:image001.png at 01D459DE.3A834440]
For launching the simulation, I had the problem with internal convergence of trnflow: Convergence of the internal iteration of TYPE 56 not attained within 100max. number of internal iteration.

When I decrease the radiative part of heating type to 0.8 the simulation work well without any error.

Any help will be appreciated!

Thank you very much.

Long

-----------
Van Long LE
Research Engineer
Energy & Building

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