[TRNSYS-users] EQUATION
王洋
wanghongyang1767 at gmail.com
Wed Nov 2 06:03:33 PDT 2011
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：
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> 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
>
>
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