What"s meaning of the storage of heat in the room air and building mass?
Does it mean the room and building mass can store the heat? If so, how to embody its storage of heat? Please take some examples!
Many thanks!
Br.
wang
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Today's Topics:
1. HELP TRNSYS 16 (david.irusta@idom.com)
2. Create a final report with TrnEdit (Manu)
3. Own height factor of large opening in TRNFlow
(=?GB2312?B?zfXR8w==?=)
---------- 已转发邮件 ----------
From: david.irusta@idom.com
To: trnsys-users@cae.wisc.edu
Date: Tue, 14 Dec 2010 17:08:49 +0100
Subject: [TRNSYS-users] HELP TRNSYS 16
Hi,
After resolve some doubts about how to simulate my building model , now I´m triying to use mediterranean meteorology but the extensions are .met and I need .tm2
what can I do? How can I convert? Can I use this extensions in ny model?
On another hand, we want to resolve different kind of buildings( housing, office,...), all of them using TABS
Which is the best way,TRNSYS 16 or TRNSYS LITE? What do you recommend? Why?
Regards
David Irusta
De: David BRADLEY <d.bradley@tess-inc.com>
Para: david.irusta@idom.com
cc: trnsys-users@cae.wisc.edu
Fecha: 03/12/2010 17:37
Asunto: Re: [TRNSYS-users] HELP TRNSYS 16
David
-How do you Know if the horizontal wall is floor o ceiling?
The TRNSYS 16 building model was non-geometric; when you define a horizontal surface, the only thing that indicates whether it is a floor or a ceiling is the condition that you impose on the opposite side of the surface.
-Creating a Multizone Building,
when you have to decide the outputs,how can you select a surface(to choose for example TOFL) instead of a Thermal zone?
there are a number of radio buttons across the middle of the window. You still select a zone but then you switch to "surface outputs" and you will see the available NTYPEs for the surfaces in that zone.
how can you do a multistorey building??
The ceiling of one zone is set as wall type "ADJACENT" and you indicate the name of the zone above whose floor is the same as that ceiling.
I´m interested in create a model about TABS (thermal active building system) which includes active layers
-where can I find examples or tutorials with TRNSYS 16?
I believe that some of the feedback controller examples (..trnsys16\Examples\...) show how to use the active layers.
Best,
David
--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
d.bradley@tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
---------- 已转发邮件 ----------
From: Manu <manuel.tilly@gmail.com>
To: trnsys-users@cae.wisc.edu
Date: Tue, 14 Dec 2010 14:29:23 +0100
Subject: [TRNSYS-users] Create a final report with TrnEdit
Hi,
I try to use TrnEdit on a project and I want to know if it's possible to generate a final report (Word or pdf extension file) withe graphic and text comment, juste like SimSol (french application based on TRNSys to dimention a solar system).
Thank you
Best regards
---------- 已转发邮件 ----------
From: 王洋 <wanghongyang1767@gmail.com>
To: trnsys-users@cae.wisc.edu
Date: Wed, 15 Dec 2010 14:50:53 +0100
Subject: [TRNSYS-users] Own height factor of large opening in TRNFlow
Dera All,I have a question about Own height factor of large opening in TRNFlow: Our windows are normal casement window. Should it be 1? I think the opening is in a vertical wall. Is it right or not?Many thanks!Br.wang2010/12/14 <trnsys-users-request@cae.wisc.edu>
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When replying, please edit your Subject line so it is more specific
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Today's Topics:
1. Re: heat exchangere (David BRADLEY)
2. Re: Strange error when using the equation proforma (David BRADLEY)
3. Re: Strange error when using the equation proforma (David BRADLEY)
4. Re: About building loads calculation in TRNSYS (David BRADLEY)
---------- 已转发邮件 ----------
From: David BRADLEY <d.bradley@tess-inc.com>
To: trnsys-users@cae.wisc.edu
Date: Tue, 14 Dec 2010 15:56:15 -0600
Subject: Re: [TRNSYS-users] heat exchangere
Elly,
If you have the TESS HVAC library, there are a number of heat exchangers with controlled outlet temperature models in there. If not then you will need to use a variable speed pump (Type3) , the heat exchanger, and (most likely) a PID controller (Type23).
Best,
David
On 12/13/2010 15:24, e.nicolazzi@libero.it wrote:
Dear Transys-user,
I'm simulating, with trnsys 16, a plate heat exchanger for district heating
substation. I'm using type 5b, is it correct?
There's a control unit that in function of external temperature and the hot-
side outlet temperature (secondary pipe) open or close (%) the valve in the hot-
side inlet temperature (primary pipe).
Can someone tell me how can i model a control unit? which types can i use?
Thanks in advance,
Elly
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--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
d.bradley@tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
---------- 已转发邮件 ----------
From: David BRADLEY <d.bradley@tess-inc.com>
To: a8304506@graduate.hku.hk
Date: Tue, 14 Dec 2010 16:00:22 -0600
Subject: Re: [TRNSYS-users] Strange error when using the equation proforma
Chun Kwong,
You are correct in your understanding of how TRNSYS iterates to solve. However, it has to have somewhere to start so TRNSYS performs a check on all the equations before starting the simulation to make sure that it can solve them. If you wrote a set of equations that said:
EQUATIONS 2
A = B
B = A
there would be no way that TRNSYS could ever solve because it would have nowhere to begin the iteration. My guess is that your T_CHWS and T_CHWR equations are too interdependent.
Best,
david
On 12/13/2010 20:38, a8304506@graduate.hku.hk wrote:Hello, everyone. I am trying to simulate a chiller plant with primary and secondary chilled water pump systems. I use to equation proforma to calculate the chilled water flow and temperature at the supply and return header. However, I get the following error messages: *** Fatal Error at time : 0.000000 Generated by Unit : Not applicable or not available Generated by Type : Not applicable or not available TRNSYS Message 420 : The following variable defined in an EQUATIONs or CONSTANTs card could not be solved as this variable depends on either an undefined EQUATION or CONSTANT name or depends on another EQUATION or CONSTANT that cannot be solved. For example A=B and B=A would trigger this error Reported information : T_CHWS *** Fatal Error at time : 0.000000 Generated by Unit : Not applicable or not available Generated by Type : Not applicable or not available TRNSYS Message 420 : The following variable defined in an EQUATIONs or CONSTANTs card could not be solved as this variable depends on either an undefined EQUATION or CONSTANT name or depends on another EQUATION or CONSTANT that cannot be solved. For example A=B and B=A would trigger this error Reported information : T_CHWR I am a little bit confused. My understanding is that Trnsys performs the calculation in the equation proforma based on the input and the sequence of the equations as typed in the proforma, and the system performance at each time step is determined component by component which follow the order as indicated in the input file. Hence, should there be any improper formulation, the consequence should generally be non-convergence. Is my interpretation wrong, and how can I solve the problem? Please advise. Thank you! Best Regards LEE, Chun Kwong City University of Hong Knog_______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com
---------- 已转发邮件 ----------
From: David BRADLEY <d.bradley@tess-inc.com>
To: a8304506@graduate.hku.hk
Date: Tue, 14 Dec 2010 16:00:41 -0600
Subject: Re: [TRNSYS-users] Strange error when using the equation proforma
Chun Kwong,
You are correct in your understanding of how TRNSYS iterates to solve. However, it has to have somewhere to start so TRNSYS performs a check on all the equations before starting the simulation to make sure that it can solve them. If you wrote a set of equations that said:
EQUATIONS 2
A = B
B = A
there would be no way that TRNSYS could ever solve because it would have nowhere to begin the iteration. My guess is that your T_CHWS and T_CHWR equations are too interdependent and therefore can't be resolved.
Best,
david
On 12/13/2010 20:38, a8304506@graduate.hku.hk wrote:Hello, everyone. I am trying to simulate a chiller plant with primary and secondary chilled water pump systems. I use to equation proforma to calculate the chilled water flow and temperature at the supply and return header. However, I get the following error messages: *** Fatal Error at time : 0.000000 Generated by Unit : Not applicable or not available Generated by Type : Not applicable or not available TRNSYS Message 420 : The following variable defined in an EQUATIONs or CONSTANTs card could not be solved as this variable depends on either an undefined EQUATION or CONSTANT name or depends on another EQUATION or CONSTANT that cannot be solved. For example A=B and B=A would trigger this error Reported information : T_CHWS *** Fatal Error at time : 0.000000 Generated by Unit : Not applicable or not available Generated by Type : Not applicable or not available TRNSYS Message 420 : The following variable defined in an EQUATIONs or CONSTANTs card could not be solved as this variable depends on either an undefined EQUATION or CONSTANT name or depends on another EQUATION or CONSTANT that cannot be solved. For example A=B and B=A would trigger this error Reported information : T_CHWR I am a little bit confused. My understanding is that Trnsys performs the calculation in the equation proforma based on the input and the sequence of the equations as typed in the proforma, and the system performance at each time step is determined component by component which follow the order as indicated in the input file. Hence, should there be any improper formulation, the consequence should generally be non-convergence. Is my interpretation wrong, and how can I solve the problem? Please advise. Thank you! Best Regards LEE, Chun Kwong City University of Hong Knog_______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com
---------- 已转发邮件 ----------
From: David BRADLEY <d.bradley@tess-inc.com>
To: Catherine <xueyushuiyun@gmail.com>
Date: Tue, 14 Dec 2010 16:18:17 -0600
Subject: Re: [TRNSYS-users] About building loads calculation in TRNSYS
Catherine,
You are quite correct that integrating solar collectors with the building skin will change the loads on the building. I would guess that in simulating such a situation, most people ignore the interaction and assume that the presence of the collectors changes the loads only slightly in comparison to the magnitude of the loads themselves.
There are a few models of building-integrated photovoltaic panels in the TESS Green Building Library (now called the TESS Electrical Library) but they all assume an air gap behind the absorber surface and in front of the building skin.
Kind regards,
David
On 12/9/2010 19:33, Catherine wrote:I want to calculate the building loads when the flat-plate collector stick to the flat roof , but , how to achieve it using TRNSYS ? Well , I tend to utilize the Type 56 for building model .By the way , my building is an ordinary six-storey residential building .And there is no air gap between the collectors and the roof-covering . As well as collectors completely covered the flat roof , except the location for lacing the water tank .
On the one hand , since the collector block the radiation for the roof , which alters the energy balance of building , as well as causes changes in building loads. On the other hand , for the original building , after the collector added to the roof, the thermal resistance increases , with the building heat through the roof decreasing .Wish some suggestions ._______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com
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