Re: [TRNSYS-users] TRNSYS-users Digest, Vol 155, Issue 13

2017-11-08 11:52 GMT+01:00 <trnsys-users-request@lists.onebuilding.org>:

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Today's Topics:

1. PCMs integrated in walls or similar (Nika Gerbec)
2. Re: PCMs integrated in walls or similar (hotline)
3. Reflective insulation (Yossef Ibrahimi)
4. Re: Dynamic efficiency (Seyyed Tajdaran)

---------- Mensaje reenviado ----------
From: Nika Gerbec <nikagerbec@gmail.com>
To: trnsys-users@lists.onebuilding.org
Cc:
Bcc:
Date: Wed, 8 Nov 2017 09:56:55 +0100
Subject: [TRNSYS-users] PCMs integrated in walls or similar
Hello

I've been studying how PCM materials integrated in the walls can contribute to energy efficency of buildings. I am trying to simulate this with TRNSYS but I am missing a PCM type or modul for this.

Does anybody has an experience working with PCMs and can share type with me?

Thank you in advance
Nika Gerbec

---------- Mensaje reenviado ----------
From: hotline <hotline@transsolar.com>
To: "TRNSYS users mailing list at OneBuilding.org" <trnsys-users@lists.onebuilding.org>
Cc:
Bcc:
Date: Wed, 8 Nov 2017 09:02:28 +0000
Subject: Re: [TRNSYS-users] PCMs integrated in walls or similar

Dear Nika,

what about TS nostand Type 399?

http://www.trnsys.de/download/de/ts_type_399_en.pdf

Best
Jakob

__________________________________________________________________________________________________

Jakob Merk M.Sc.

Transsolar Energietechnik GmbH

Curiestraße 2

70563 Stuttgart

http://www.transsolar.com

Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden

Stuttgart – München – New York – Paris

Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter Schnelle

Eingetragen beim Amtsgericht Stuttgart HRB 23347,

Steuernummer: 99073/00911,USt-IdNr.: DE 152272639

Von: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] Im Auftrag von Nika Gerbec via TRNSYS-users
Gesendet: 08 November 2017 09:57
An: trnsys-users@lists.onebuilding.org
Cc: Nika Gerbec <nikagerbec@gmail.com>
Betreff: [TRNSYS-users] PCMs integrated in walls or similar

Hello

I've been studying how PCM materials integrated in the walls can contribute to energy efficency of buildings. I am trying to simulate this with TRNSYS but I am missing a PCM type or modul for this.

Does anybody has an experience working with PCMs and can share type with me?

Thank you in advance

Nika Gerbec

---------- Mensaje reenviado ----------
From: Yossef Ibrahimi <yossefibrahimi@yahoo.com>
To: "TRNSYS Users Mailing List at OneBuilding.org" <trnsys-users@lists.onebuilding.org>
Cc:
Bcc:
Date: Wed, 8 Nov 2017 10:34:50 +0000 (UTC)
Subject: [TRNSYS-users] Reflective insulation
Hi,

I try to model a roof with an "air gap" and "reflective insulation", but It's not possible to specify the longwave emission and the absorptance coefficient for each layer (TRNSYS 17).
Shall I create a zone with a height=air gap above the roof, and use the carachteristics of the reflective insulation for the back side of the roof and front side of this aditionnal zone ?

Best regards,
Yossef

---------- Mensaje reenviado ----------
From: Seyyed Tajdaran <stajdaran@brookes.ac.uk>
To: Jeff Thornton <thornton@tess-inc.com>
Cc: "TRNSYS users mailing list at OneBuilding.org" <trnsys-users@lists.onebuilding.org>
Bcc:
Date: Wed, 8 Nov 2017 10:52:11 +0000
Subject: Re: [TRNSYS-users] Dynamic efficiency
That's brilliant

The thing I am just struggling to follow is, if for instance for a boiler the input value for the boiler efficiency is set and the Macro button is toggled, are we expecting the efficiency to stay fixed during the time? and how the macro is impleneted here. The problem is I can't find the documentation of Boiler's in 2017 version.

On 7 November 2017 at 15:30, Jeff Thornton <thornton@tess-inc.com> wrote:
Sadjad,

Absolutely that's how TRNSYS works. TRNSYS models take time independent values called PARAMETERS and time-dependent values called INPUTS together to calculate the OUTPUTS from the model. The inputs can be from another model, set to a constant value, read from an external file, set by a function etc.

We have several "heating unit" models and they differ on how they calculate the performance. Most read a performance data file that returns a value based on the inlet operating conditions.

Jeff
TESS LLC

Sent from my iPhone

On Nov 7, 2017, at 3:40 AM, Seyyed Tajdaran via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:

Hello all

I am looking into use TRNSYS for dynamic simulation. However, I am struggling to find out if the software actually works in a dynamic condition. To be specific I would like to know if the efficiency of a heating unit is calculated as a function of the relevant parameters (i.e. time, temperature, pressure)???

Warm regards,
Sadjad
--
Sadjad Tajdaran
PhD Candidate | Research Assistant

Oxford Brookes University, School of Architecture, Faculty of Technology Design and Environment
Architectural Engineering Group
JP203, John Payne Building,Headington Campus, Gipsy Lane, Oxford, UK, OX3 0BP

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--
Sadjad Tajdaran
Research Assistant | PhD candidate

Oxford Brookes University, Faculty of Technology Design and Environment
Architectural Engineering Group and DYNAMO Project Group
JP204, John Payne Building, Headington Campus, Gipsy Lane, Oxford, UK, OX3 0BP
R201, R Building, Wheatley Campus, Wheatley, Oxford, OX33 1HX

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