[TRNSYS-users] TRNSYS 3 D model and 2 D model

Dear Christoph,

Many thanks for your response.

1) Following your email, seen from the figure 1 below, which connections need we make in between? is it enough just connecting AAZM of Equ with Input 6 AAZM of Type 56?

2) Still for the same model, I compared 3D and 2D models with the same settings (Theat = 22 C, Tcool = 28 C) in TRNBuild. I found annual Qheat of 2D model (69272 kWh) is very similar to 3D model (68750 kWh). But, annual Qcool of 2D model (134314 kWh) is far larger even twice as 3D model (68083 kWh). It is very weird for them. Could you please explain that? Or which one should be correct/should we believe?

Many thanks

Br.

Yang

Figure 1

hotline <hotline@transsolar.com> 于2018年11月28日周三下午6:38写道：

Dear Wang Yang,

the difference is that in “2D-model” you used the external calculation of radiation data and in “3D-model” you used the internal calculation.

The option “Internal calculation of radiation data” reduces the required input data from the weather data component significantly. To use this feature only the solar zenith (Input 5) has to be connected to the weather data component Type 15, Type16, Type99.

If the option “external calculation of radiation data” is selected, three inputs of incident radiation to the Type 56 Trnsys component will be required. This is generally provided by the weather component.

The internal as well as the external calculation of radiation data are using the same radiation calculation routine from kernel.

The orientation named H_0_0 is automatically recognized as the horizontal radiation. If this orientation doesn’t exist, no diffuse geometric shading and daylight calculation is performed.

For more Information, please have a look into the … \Documentation\05-MultizoneBuilding.pdf -> The Project Dialog Box

Best,

Christoph

Von: WANG Yang <wanghongyang1767@gmail.com>
Gesendet: Dienstag, 27. November 2018 08:53
An: trnsys-users@lists.onebuilding.org; hotline <hotline@Transsolar.com>
Betreff: Re: TRNSYS-users Digest, Vol 167, Issue 22

Dear Madam or Sir,

I hope all is well.

I have the new questions between old 2D simulation and current 3D simulation (TRNSYS3D):

1) after I imported *idf file to simulation studio, the link between Radiation Equation and Type56 is lack of many inputs and outputs, see below pictures. Furthermore, I cannot also Define new inputs from TRNBuild e.g. IT N 180 90, IT S 0 90 etc. Thus, I cannot use TRNSYS 3D model to repeat/simulate my previous project.

How to deal with this problem? Super thanks

Br.

Yang

2D model

3D model

TRNBuild Settings for Inputs

<trnsys-users-request@lists.onebuilding.org> 于2018年11月24日周六上午5:22写道：

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Today's Topics:

1. Re: QTSABS vs QSOLTR (Karol Bandurski)

---------- Forwarded message ----------
From: Karol Bandurski <karol.bandurski@put.poznan.pl>
To: "'hotline'" <hotline@transsolar.com>, "'TRNSYS users mailing list at OneBuilding.org'" <trnsys-users@lists.onebuilding.org>
Cc:
Bcc:
Date: Fri, 23 Nov 2018 09:39:10 +0100
Subject: Re: [TRNSYS-users] QTSABS vs QSOLTR

Dear Christoph,

Thank you for your response!

The problem is that, it seems to me, that I don’t have internal shading, so QSOLTR should equal QTSABS. Am I right?

How should I set window type and external devices to get QSOLTR=QTSABS?

Kind regards,
Karol

From: hotline [mailto:hotline@Transsolar.com]
Sent: Thursday, November 22, 2018 4:57 PM
To: TRNSYS users mailing list at OneBuilding.org
Subject: Re: [TRNSYS-users] QTSABS vs QSOLTR

Dear Karol,

QSOLTR is the total shortwave solar radiation transmitted through external windows and internal shading.

QTSABS also includes the secondary heat flux which includes the convection of internal shader.

Hope that clarifies your energy balance a bit.

Best,

Christoph

Von: TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org> Im Auftrag von Karol Bandurski via TRNSYS-users
Gesendet: Mittwoch, 21. November 2018 16:42
An: trnsys-users@lists.onebuilding.org
Cc: Karol Bandurski <karol.bandurski@put.poznan.pl>
Betreff: [TRNSYS-users] QTSABS vs QSOLTR

Dear All,

I am going to find whole solar gain which come to zone throug windows.

There are two outputs that I consider: QTSABS and QSOLTR.

It seems to me that bigger should be QSOLTR, because it is shortwave radiation transmitted through window (but not kept 100% in air node).

The QTSABS is what exactly has been kept - has been absorbed by inside surfaces.

But it is appear that QTSABS > QSOLTR…

Could you write me what is right interpretation of those outputs?

Kind regards,
Karol

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

Karol BANDURSKI M. Sc.

Faculty of Civil and Environemntal Engeneering

Division of Heating, Air Conditioning and Air Protection

Poznan University of Technology

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

www.put.poznan.pl/~karol.bandurski

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