The data structure of Type 56(Multi-zone) in TRNSYS

It looks like if I want to use the Heat Tansfer Coefficient based on the results from OpenFoam, I need modify the .inf file somehow. The Heat Transfer Coefficient depends on the Wall Surface Temperatue and the Air Temperature close to the wall. Usually, the convective heat transfer coefficient of wall is set per wall type either as userdefined or as internal calculation. During the internal calculation, the AirNode temperature is used, which will be replaced by OpenFoam in the Coupling. So, I think we should choose it as userdefined. Under userdefined dialog, we can see 3 options: Constant Value, Input, Schedule. Input should be the right choice, which means the convective heat transfer coefficient of each wall are defined as input for Type56. We can calculate them and save data in an external file. Because of the variation of the Air Temperature in CFD, the Heat Transfer Coefficient could also be variable. That means, for each surface of the geometry, a wall type should be defined according to the air temperature. CHTC

I searched whole day without success, the workflow is to use the heat flux value from OpenFoam for surface energy balance calculation instead of the process of internal calculation with airnode temperature. If Fluent is used, maybe Type 101 is just right for this, but OpenFoam is the tool available to me. I must find another solution to make this happen. I don’t really understand the setting of Wall Gain , is this just means Convective Heat Flux?

One thought on “The data structure of Type 56(Multi-zone) in TRNSYS”

  1. the .BUI file also contains the informations in .INF file, maybe the .BUI should be modified during the coupling process, because the TRNStudio read the .BUI file.

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