[TRNSYS-users] EQUATION
Laia Cases - iMat
lcases at imat.cat
Wed Nov 2 06:07:11 PDT 2011
Wang,
OF=GT(CO2,1000)*1+GT(700,CO2)*0
Laia
El 02/11/2011 14:03, ?? 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
>
> ? 2011?11?2? ??12:19, <trnsys-users-request at cae.wisc.edu
> <mailto:trnsys-users-request at cae.wisc.edu>>? ?:
>
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>
> Today's Topics:
>
> 1. EQUATION (??)
> 2. Re: air Density in TRNBuild (Mohamed Ayman)
>
>
> ---------- ????? ----------
> From: ?? <wanghongyang1767 at gmail.com
> <mailto:wanghongyang1767 at gmail.com>>
> To: trnsys-users at cae.wisc.edu <mailto: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
>
> ? 2011?11?2? ??12:14,?? <wanghongyang1767 at gmail.com
> <mailto:wanghongyang1767 at gmail.com>>? ?:
>
> 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
> <mailto:trnsys-users-request at cae.wisc.edu>>
>
> Send TRNSYS-users mailing list submissions to
> trnsys-users at cae.wisc.edu <mailto: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
> <mailto:trnsys-users-request at cae.wisc.edu>
>
> You can reach the person managing the list at
> trnsys-users-owner at cae.wisc.edu
> <mailto: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)
>
>
> ---------- ????? ----------
> From: David BRADLEY <d.bradley at tess-inc.com
> <mailto:d.bradley at tess-inc.com>>
> To: "Adriana Gómez Aldana" <adrigomezaldana at gmail.com
> <mailto: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 <mailto: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 <tel:%2B1.608.274.2577>
> F:+1.608.278.1475 <tel:%2B1.608.278.1475>
> d.bradley at tess-inc.com <mailto:d.bradley at tess-inc.com>
>
> http://www.tess-inc.com <http://www.tess-inc.com/>
> http://www.trnsys.com <http://www.trnsys.com/>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu <mailto:TRNSYS-users at cae.wisc.edu>
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>
>
>
>
>
> ---------- ????? ----------
> From: Mohamed Ayman <ayman.mohamed at aalto.fi
> <mailto:ayman.mohamed at aalto.fi>>
> To: ?? <wanghongyang1767 at gmail.com
> <mailto:wanghongyang1767 at gmail.com>>, "trnsys-users at cae.wisc.edu
> <mailto:trnsys-users at cae.wisc.edu>" <trnsys-users at cae.wisc.edu
> <mailto: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>
> [mailto: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 <mailto: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
> <mailto:trnsys-users-request at cae.wisc.edu>>
>
> Send TRNSYS-users mailing list submissions to
> trnsys-users at cae.wisc.edu <mailto: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
> <mailto:trnsys-users-request at cae.wisc.edu>
>
> You can reach the person managing the list at
> trnsys-users-owner at cae.wisc.edu
> <mailto: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)
>
>
> ---------- ????? ----------
> From: David BRADLEY <d.bradley at tess-inc.com
> <mailto:d.bradley at tess-inc.com>>
> To: "Adriana Gómez Aldana" <adrigomezaldana at gmail.com
> <mailto: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 <mailto: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 <tel:%2B1.608.274.2577>
>
> F:+1.608.278.1475 <tel:%2B1.608.278.1475>
>
> d.bradley at tess-inc.com <mailto:d.bradley at tess-inc.com>
>
>
>
> http://www.tess-inc.com <http://www.tess-inc.com/>
>
> http://www.trnsys.com <http://www.trnsys.com/>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu <mailto:TRNSYS-users at cae.wisc.edu>
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu <mailto: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
> --
> *Laia Cases*
> Unitat de Condicionament Tèrmic
> *iMat - Centre Tecnològic de la Construcció
> lcases at imat.cat <mailto:lcases at imat.cat>
> www.imat.cat <http://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
>
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