[TRNSYS-users] infiltration rate
David BRADLEY
d.bradley at tess-inc.com
Tue Feb 22 14:19:29 PST 2011
Wang,
When you use TRNFlow, you are allowing Type56 to compute interzonal air
flow rates based on the external environmental conditions that you are
imposing (from a weather file for example). I suppose that you would
have to tune either the environmental conditions or the amount of
openings in your building envelope so that you get an infiltration rate
(calculated by TRNFlow) that approximates the value that you measured
(0.53 ach/h)
regards,
David
On 2/22/2011 14:20, 王洋 wrote:
>
> Dear Mr. Bradley,
>
> Thanks for your reply!
>
> But in the TRNFlow manual: there it is explained that "As soon as
> TRNFLOW is turned on, (...) in the simulation the defined
> infiltrations, ventilations and couplings will be replaced with the
> calculated air flows."
>
> The fact is that I defined initial CO2% as 1000 ppm in the test room
> in TRNFlow, and I defined the ambient CO2% as 380 ppm. Meanwhile, I
> defined the infiltration rate as 0.5276 1/h in TRNBUILD. I want to
> compare the CO2% reducing curve in the test room based on the
> infiltration rate 0.5276 1/h of actual measurement value with by
> TRNSYS simulation. But when I used TRNFLOW, the defined infiltration
> rate as 0.5276 1/h in TRNBUILD was replaced maybe. 1000 ppm in the
> test room keeps constant. Please explain this! Or tell me how to
> compare the test room infiltration rate of actual measurement value
> with by TRNSYS/TRNFlow simulation?
>
>
> Many thanks!
>
> Br.
>
>
> wang
>
> 在 2011年2月22日 下午5:39，王洋 <wanghongyang1767 at gmail.com
> <mailto:wanghongyang1767 at gmail.com>>写 道：
>
> Dear Mr. Bradley,
> Thanks for your reply!
> But in the TRNFlow manual: there it is explained that "As soon as
> TRNFLOW is turned on, (...) in the simulation the defined
> infiltrations, ventilations and couplings will be replaced with
> the calculated air flows."
> The fact is that I defined initial CO2% as 1000 ppm in the test
> room in TRNFlow, and I defined the ambient CO2% as 380 ppm.
> Meanwhile, I defined the infiltration rate as 0.5276 1/h in
> TRNBUILD. I want to compare the CO2% reducing curve in the test
> room based on the infiltration rate 0.5276 1/h of actual
> measurement value with by TRNSYS simulation. But when I used
> TRNFLOW, the defined infiltration rate as 0.5276 1/h in TRNBUILD
> was replaced maybe. 1000 ppm in the test room keeps constant.
> Please explain this! Or tell me how to compare the test room
> infiltration rate of actual measurement value with by
> TRNSYS/TRNFlow simulation?
> Many thanks!
> Br.
> wang
> .
> 2011/2/22 David BRADLEY <d.bradley at tess-inc.com
> <mailto:d.bradley at tess-inc.com>>
>
> Wang,
> TRNBuild offers an output (NTYPE96) which is the air change
> rate of infiltration. TRNBuild also offers an output for the
> energy gain (or loss) from infiltration (NTYPE4)
> Regards,
> David
>
>
>
> On 2/21/2011 15:16, 王洋 wrote:
>> Dear all,
>>
>>
>> I want to compare the test room infiltration rate of actual
>> measurement with by TRNSYS simulation. Maybe as you know, in
>> the TRNFlow manual: there it is explained that "As soon as
>> TRNFLOW is turned on, (...) in the simulation the defined
>> infiltrations, ventilations and couplings will be replaced
>> with the calculated air flows."
>> I defined CO2% as 1000 ppm in TRNFlow, then I want to observe
>> CO2%'s reducing curve when infiltration rate is 0.5276 1/h (I
>> measured the value in the test room), so I defined the
>> infiltration rate as 0.5276 1/h in TRNBUILD. But when I used
>> TRNFLOW, the defined infiltration rate as 0.5276 1/h in
>> TRNBUILD was replaced. And 1000 ppm keeps constant.
>>
>> Please tell me how to get the infiltration rate curve using
>> TRNSYS/TRNFLOW or how to explain this ?
>>
>> Many thanks!
>>
>> br
>>
>> wang
>>
>>
>>
>> 在 2011年2月21日 下午12:07，王洋 <wanghongyang1767 at gmail.com
>> <mailto:wanghongyang1767 at gmail.com>>写 道：
>>
>> Dear all,
>>
>>
>> I want to compare the test room infiltration rate of
>> actual measurement with by TRNSYS simulation. Maybe as
>> you know, in the TRNFlow manual: there it is explained
>> that "As soon as TRNFLOW is turned on, (...) in the
>> simulation the defined infiltrations, ventilations and
>> couplings will be replaced with the calculated air flows."
>> I defined CO2% as 1000 ppm in TRNFlow, then I want to
>> observe CO2%'s reducing curve when infiltration rate is
>> 0.5276 1/h (I measured the value in the test room), so I
>> defined the infiltration rate as 0.5276 1/h in TRNBUILD.
>> But when I used TRNFLOW, the defined infiltration rate as
>> 0.5276 1/h in TRNBUILD was replaced. And 1000 ppm keeps
>> constant.
>>
>> Please tell me how to get the infiltration rate curve
>> using TRNSYS/TRNFLOW or how to explain this ?
>>
>> Many thanks!
>>
>> br
>>
>> wang
>>
>> 2011/2/21 <trnsys-users-request at cae.wisc.edu
>> <mailto:trnsys-users-request at cae.wisc.edu>>
>>
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>> Today's Topics:
>>
>> 1. Problems with calling EES (Type66a) (Doms Joris)
>> 2. wall definition (davide disco)
>>
>>
>> ---------- 已转发邮件 ----------
>> From: Doms Joris <joris.doms at vito.be
>> <mailto:joris.doms at vito.be>>
>> To: "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: Sun, 20 Feb 2011 22:43:08 +0100
>> Subject: [TRNSYS-users] Problems with calling EES
>> (Type66a)
>> Dear TRNSYS users,
>> When simulating an applied thermal system, I'm using
>> EES for the hydronic part. I programmed the hydronic
>> circuit in EES and coupled it with TRNSYS via Type
>> 66a. This coupling works fine, but;
>> The problem is that the simulation runs very slow.
>> Every timestep that TRNSYS calls EES, the EES project
>> is opened and closed. Is there a way to set some
>> settings so EES isen't closed and reopened each time,
>> this would minimize the solution time alot.
>> Thanks on advance
>> Joris Doms
>>
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>> ---------- 已转发邮件 ----------
>> From: davide disco <chester_83 at hotmail.it
>> <mailto:chester_83 at hotmail.it>>
>> To: <trnsys-users at cae.wisc.edu
>> <mailto:trnsys-users at cae.wisc.edu>>
>> Date: Mon, 21 Feb 2011 11:57:59 +0100
>> Subject: [TRNSYS-users] wall definition
>> Dear all,
>> when entering data in Trnbuild I have to describe the
>> walls of the zone: if, looking at the plant of the
>> building, the building has more than a wall south
>> oriented for example (wall to the left in the plant)
>> I should enter in Trnbuild each section of wall
>> facing south or I should enter a unique wall that is
>> the sum of all sections of wall facing south?
>> Thanks in advace.
>> Best regards
>>
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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 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/>
>
>
>
--
***************************
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
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