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von fechner
28 Mär 2023, 18:00
Forum: Delphin
Thema: 5-cm ventilated air gap
Antworten: 6
Zugriffe: 17660

Re: 5-cm ventilated air gap

Hello, In order to have an idea for the temperature difference over a air gap you can make a simulation with standard properties first and se what differences you have. Its only a guess but better than nothing. For a ventilated air gap you can use the source 'Air exchange with ambient air..'. Here y...
von fechner
01 Feb 2023, 09:13
Forum: Delphin
Thema: Mould growth risk: Isopleth model results
Antworten: 7
Zugriffe: 11324

Re: Mould growth risk: Isopleth model results

Ok, there is a bug in the calculation algorithm for the mould risk times in isopleth model. I will fix it and send you a link to the new version by email. I will also put the new version on our server for download as soon as possible.
von fechner
31 Jan 2023, 18:08
Forum: Delphin
Thema: Mould growth risk: Isopleth model results
Antworten: 7
Zugriffe: 11324

Re: Mould growth risk: Isopleth model results

Hello,

Nothing is missing and I can run the calculation. But my isopleth charts look different. Do you used averaging? Do you have limited the isoplet points to a certain time period?
von fechner
29 Jan 2023, 12:49
Forum: Delphin
Thema: Mould growth risk: Isopleth model results
Antworten: 7
Zugriffe: 11324

Re: Mould growth risk: Isopleth model results

and I will check the code.
von fechner
29 Jan 2023, 12:02
Forum: Delphin
Thema: Mould growth risk: Isopleth model results
Antworten: 7
Zugriffe: 11324

Re: Mould growth risk: Isopleth model results

Hello,

May you can attach also the project file. I would like to recalculate the results in order to evaluate what happens here.
von fechner
19 Mai 2022, 13:22
Forum: Delphin
Thema: Adding a new Material in the Database
Antworten: 1
Zugriffe: 7910

Re: Adding a new Material in the Database

Hello,

The model parameter should only be used in the case you have your model for moisture storage function. If you create your storage function by data sets you don't need this sections.
von fechner
29 Mär 2022, 14:46
Forum: Delphin
Thema: Anisotropic modelling
Antworten: 1
Zugriffe: 6597

Re: Anisotropic modelling

Hello, The anisotropic modelling is not fully implemented. We don't have a tutorial and also no possibilities for setting properties in GUI. In order to set the directions you need to set a parameter in the assignment area of the project file. Here an example: <Assignment type="Material" l...
von fechner
28 Feb 2022, 16:02
Forum: Delphin
Thema: calculating surface convective heat transfer coefficient
Antworten: 3
Zugriffe: 17264

Re: calculating surface convective heat transfer coefficient

Ok, you can find an explanation of all output quantities in the output tutorial:
see here: https://www.bauklimatik-dresden.de/delp ... for_fluxes
von fechner
25 Feb 2022, 15:10
Forum: Delphin
Thema: calculating surface convective heat transfer coefficient
Antworten: 3
Zugriffe: 17264

Re: calculating surface convective heat transfer coefficient

Hello, It depends on the selected kind. For kind 'Exchange coefficient', the exchange coefficient is constant. For the kind 'Boundary layer' we use the following function: h = h0 + c * v ^ e v is the air velocity. h0, c and e are coefficients. Here is a picture of the corresponding boundary conditio...
von fechner
25 Feb 2022, 15:05
Forum: Delphin
Thema: The unit conversion in the initial conditions of Delphin model
Antworten: 1
Zugriffe: 8680

Re: The unit conversion in the initial conditions of Delphin model

Hello,

Salt mass density means salt crystals. kg/m3 means kg salt crystals per m3 materials. This unit cannot be converted into molality