[TRNSYS-users] TRNSYS-users Digest, Vol 83, Issue 6
王洋
wanghongyang1767 at gmail.com
Wed Nov 2 06:55:58 PDT 2011
Dear Laia Cases,
Many thanks!
For OF=GT(CO2,1000)*1+GT(700,CO2)*0
GT(700,CO2)*0 is always 0.
I think it should be OF=GT(CO2,1000)*1+GT(CO2,700)*1
But the result becomes CO2 ia always less than 700, it can not get to 1000.
So PLEASE pass me some ideas or EQUATIONS: first, get to 1000 ppm, then
OF=1, until 700 ppm OF = 0
Many thanks in advance!
Br.
wang
2011/11/2 <trnsys-users-request at cae.wisc.edu>
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> Today's Topics:
>
> 1. Re: EQUATION (Laia Cases - iMat)
>
>
> ---------- 已转发邮件 ----------
> From: Laia Cases - iMat <lcases at imat.cat>
> To: trnsys-users at cae.wisc.edu
> Date: Wed, 02 Nov 2011 14:07:11 +0100
> Subject: Re: [TRNSYS-users] EQUATION
> Wang,
>
> OF=GT(CO2,1000)*1+GT(700,CO2)*0
>
> Laia
>
> El 02/11/2011 14:03, 王洋 escribió:
>
> Dear all,
>
> Please tell me how to set an equation:
>
> OF=1, when CO2%>1000
>
> OF = 0, when CO2%< 700
>
> I tried to use LT and GE, but e.g. it only realize OF = 1, when
> CO2%>1000 and OF = 0, when CO2% < 1000.
>
> I need
> OF=1, when CO2%>1000
>
> OF = 0, when CO2%< 700
>
> Thanks in advance!
>
> wang
>
> 在 2011年11月2日 下午12:19， <trnsys-users-request at cae.wisc.edu>写 道：
>
>> Send TRNSYS-users mailing list submissions to
>> trnsys-users at cae.wisc.edu
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>> or, via email, send a message with subject or body 'help' to
>> trnsys-users-request at cae.wisc.edu
>>
>> You can reach the person managing the list at
>> trnsys-users-owner at cae.wisc.edu
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of TRNSYS-users digest..."
>>
>> Today's Topics:
>>
>> 1. EQUATION (??)
>> 2. Re: air Density in TRNBuild (Mohamed Ayman)
>>
>>
>> ---------- 已转发邮件 ----------
>> From: 王洋 <wanghongyang1767 at gmail.com>
>> To: trnsys-users at cae.wisc.edu
>> Date: Wed, 2 Nov 2011 12:16:37 +0100
>> Subject: [TRNSYS-users] EQUATION
>> Dear all,
>>
>> Please tell me how to set an equation:
>>
>> OF=1, when CO2%>1000
>>
>> OF = 0, when CO2%< 700
>>
>> Thanks!
>>
>> wang
>>
>> 在 2011年11月2日 下午12:14，王洋 <wanghongyang1767 at gmail.com>写 道：
>>
>>> Dear all,
>>>
>>> Which experts can tell me a question about air density?
>>>
>>> In TRNbuild PROPERTIES about air density 1.2 kg/m^3: Is it a
>>> initial value? If outdoor temperature changes in TrnFlow, this air density
>>> value will change as the teperature or it is a constant?
>>>
>>> Thanks!
>>>
>>> wang
>>>
>>>
>>>
>>> 2011/11/1 <trnsys-users-request at cae.wisc.edu>
>>>
>>>> Send TRNSYS-users mailing list submissions to
>>>> trnsys-users at cae.wisc.edu
>>>>
>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>>>> or, via email, send a message with subject or body 'help' to
>>>> trnsys-users-request at cae.wisc.edu
>>>>
>>>> You can reach the person managing the list at
>>>> trnsys-users-owner at cae.wisc.edu
>>>>
>>>> When replying, please edit your Subject line so it is more specific
>>>> than "Re: Contents of TRNSYS-users digest..."
>>>>
>>>> Today's Topics:
>>>>
>>>> 1. Re: Information (David BRADLEY)
>>>>
>>>>
>>>> ---------- 已转发邮件 ----------
>>>> From: David BRADLEY <d.bradley at tess-inc.com>
>>>> To: "Adriana Gómez Aldana" <adrigomezaldana at gmail.com>
>>>> Date: Tue, 01 Nov 2011 11:35:52 -0500
>>>> Subject: Re: [TRNSYS-users] Information
>>>> Adriana,
>>>> I had thought that I sent a response about this. In case it did not
>>>> get to you, here it is again:
>>>>
>>>> ...
>>>> It would help to know a bit more about the configuration of your
>>>> system: what are you drying, is the material in a big lump, is it spread
>>>> out on shelves, is it moving, does it occupy most of the available space in
>>>> the chamber or a comparatively small part of the space, etc.)
>>>>
>>>> I think you could probably use the Type56 multi-zone building model
>>>> for the drying chamber itself.
>>>>
>>>> I would guess that you would need to write a new model for the
>>>> material that you are drying. If the material is quite spread-out then this
>>>> might be easily enough characterized by a first-order differential equation
>>>> and you even might be able to use Tess Type693. Type693 is intended to
>>>> model a thermal lumped capacitance that heats and cools according to a
>>>> first-order differential equation but I imagine that pricipals are
>>>> basically the same whether you are talking about thermal capacitance or
>>>> moisture capacitance.
>>>>
>>>> If the product is not spread out, if important moisture gradients
>>>> develop within it as it dries, or if its drying process is exothermic (like
>>>> it is for compost) then I think you would need to write your own model or
>>>> collaborate with someone who could write the model for you. In order to
>>>> write the model you would need to have access to a FORTRAN compiler such as
>>>> Intel Visual Fortran v11.x
>>>>
>>>> Once you have the model of the drying substance, you would connect
>>>> its moisture loss to a moisture gain input of the building (drying chamber)
>>>> model.
>>>>
>>>> Kind regards,
>>>> David
>>>>
>>>> On 10/30/2011 20:45, Adriana Gómez Aldana wrote:
>>>>
>>>>
>>>>
>>>> Good Morning,
>>>>
>>>> I am a TRNSYS user since it is one of the tools for my phD thesis.
>>>> Currently, I am working in a solar drying problem and I would like to know
>>>> if there is a special module to simulate the drying chamber. If it is
>>>> possible to acquire this module, I would be very thankful if you can
>>>> explain me how is the procedure to access it.
>>>>
>>>> Thanks for your attention,
>>>>
>>>> Adriana Gómez
>>>> phD Student - Engineering Department
>>>> Universidad de los Andes
>>>> Bogotá, Colombia
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> TRNSYS-users mailing listTRNSYS-users at cae.wisc.eduhttps://mailman.cae.wisc.edu/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:+1.608.278.1475d.bradley at tess-inc.com
>>>> http://www.tess-inc.comhttp://www.trnsys.com
>>>>
>>>>
>>>> _______________________________________________
>>>> TRNSYS-users mailing list
>>>> TRNSYS-users at cae.wisc.edu
>>>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>>>>
>>>>
>>>
>>
>>
>> ---------- 已转发邮件 ----------
>> From: Mohamed Ayman <ayman.mohamed at aalto.fi>
>> To: 王洋 <wanghongyang1767 at gmail.com>, "trnsys-users at cae.wisc.edu" <
>> trnsys-users at cae.wisc.edu>
>> Date: Wed, 2 Nov 2011 11:18:54 +0000
>> Subject: Re: [TRNSYS-users] air Density in TRNBuild
>>
>> Hi Wang
>>
>> The air density changes with temperature in Trnbuild.
>>
>> Best Regards
>>
>> Ayman Mohamed
>>
>>
>>
>> *From:* trnsys-users-bounces at cae.wisc.edu [mailto:
>> trnsys-users-bounces at cae.wisc.edu] *On Behalf Of *??
>> *Sent:* Wednesday, November 02, 2011 1:14 PM
>> *To:* trnsys-users at cae.wisc.edu
>> *Subject:* [TRNSYS-users] air Density in TRNBuild
>>
>>
>>
>> Dear all,
>>
>>
>>
>> Which experts can tell me a question about air density?
>>
>>
>>
>> In TRNbuild PROPERTIES about air density 1.2 kg/m^3: Is it a initial
>> value? If outdoor temperature changes in TrnFlow, this air density value
>> will change as the teperature or it is a constant?
>>
>>
>>
>> Thanks!
>>
>>
>>
>> wang
>>
>>
>>
>>
>>
>> 2011/11/1 <trnsys-users-request at cae.wisc.edu>
>>
>> Send TRNSYS-users mailing list submissions to
>> trnsys-users at cae.wisc.edu
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>> or, via email, send a message with subject or body 'help' to
>> trnsys-users-request at cae.wisc.edu
>>
>> You can reach the person managing the list at
>> trnsys-users-owner at cae.wisc.edu
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of TRNSYS-users digest..."
>>
>> Today's Topics:
>>
>> 1. Re: Information (David BRADLEY)
>>
>>
>> ---------- 已转发邮件 ----------
>> From: David BRADLEY <d.bradley at tess-inc.com>
>> To: "Adriana Gómez Aldana" <adrigomezaldana at gmail.com>
>> Date: Tue, 01 Nov 2011 11:35:52 -0500
>> Subject: Re: [TRNSYS-users] Information
>>
>> Adriana,
>> I had thought that I sent a response about this. In case it did not get
>> to you, here it is again:
>>
>> ...
>> It would help to know a bit more about the configuration of your
>> system: what are you drying, is the material in a big lump, is it spread
>> out on shelves, is it moving, does it occupy most of the available space in
>> the chamber or a comparatively small part of the space, etc.)
>>
>> I think you could probably use the Type56 multi-zone building model for
>> the drying chamber itself.
>>
>> I would guess that you would need to write a new model for the material
>> that you are drying. If the material is quite spread-out then this might be
>> easily enough characterized by a first-order differential equation and you
>> even might be able to use Tess Type693. Type693 is intended to model a
>> thermal lumped capacitance that heats and cools according to a first-order
>> differential equation but I imagine that pricipals are basically the same
>> whether you are talking about thermal capacitance or moisture capacitance.
>>
>> If the product is not spread out, if important moisture gradients
>> develop within it as it dries, or if its drying process is exothermic (like
>> it is for compost) then I think you would need to write your own model or
>> collaborate with someone who could write the model for you. In order to
>> write the model you would need to have access to a FORTRAN compiler such as
>> Intel Visual Fortran v11.x
>>
>> Once you have the model of the drying substance, you would connect its
>> moisture loss to a moisture gain input of the building (drying chamber)
>> model.
>>
>> Kind regards,
>> David
>>
>> On 10/30/2011 20:45, Adriana Gómez Aldana wrote:
>>
>>
>>
>> Good Morning,
>>
>>
>>
>> I am a TRNSYS user since it is one of the tools for my phD thesis.
>> Currently, I am working in a solar drying problem and I would like to know
>> if there is a special module to simulate the drying chamber. If it is
>> possible to acquire this module, I would be very thankful if you can
>> explain me how is the procedure to access it.
>>
>>
>>
>> Thanks for your attention,
>>
>>
>>
>> Adriana Gómez
>>
>> phD Student - Engineering Department
>>
>> Universidad de los Andes
>>
>> Bogotá, Colombia
>>
>>
>>
>>
>>
>> _______________________________________________
>>
>> TRNSYS-users mailing list
>>
>> TRNSYS-users at cae.wisc.edu
>>
>> https://mailman.cae.wisc.edu/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 at tess-inc.com
>>
>>
>>
>> http://www.tess-inc.com
>>
>> http://www.trnsys.com
>>
>>
>> _______________________________________________
>> TRNSYS-users mailing list
>> TRNSYS-users at cae.wisc.edu
>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>>
>>
>>
>> _______________________________________________
>> TRNSYS-users mailing list
>> TRNSYS-users at cae.wisc.edu
>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>>
>>
>
>
> _______________________________________________
> TRNSYS-users mailing listTRNSYS-users at cae.wisc.eduhttps://mailman.cae.wisc.edu/listinfo/trnsys-users
>
> --
> *Laia Cases*
> Unitat de Condicionament Tèrmic
> *iMat - Centre Tecnològic de la Construcció
> lcases at imat.cat
> www.imat.cat*
> Wellington 23 ・ E-08018 Barcelona
> T +34 93 553 97 95
> F +34 93 553 97 96
> Imprimiu aquest document només si és necessari
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>
>
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