[TRNSYS-users] Active layer dividing
David BRADLEY
d.bradley at tess-inc.com
Tue Feb 1 14:51:49 PST 2011
Wang,
I have seen this happen before as well; where the inlet mass flow rate
is above the required minimum but yet you still get an error saying that
the flow is too low. I worked with Transsolar on tracking down the cause
of the problem and we were never able to. I try to keep the inlet mass
flow rate at least 10 to 20% higher than the minimum flow rate. Adrien's
response is a good one; use the autosegment feature to break your floor
up into two or more floor segments in series and your minimum specific
flow rate will drop far enough below the 5.4 kg/h.m2 that you are
sending it.
Kind regards,
David
On 2/1/2011 06:48, 王洋 wrote:
> Dear all,
>
> I defined a active layer, but it shows ERROR as follows:
>
>
>
>
> Fatal Error at time : 0.350000
> Generated by Unit : 4
> Generated by Type : 56
> Message : Specific fluid mass flow of active layer
> in surface 7 below minimum value of 5.35 kg/m2h Please, increase the
> minimum mass flow rate or use the autosegmentation feature of TRNBuild
> for subdividing the surface.
>
>
>
> But the min. allowed inlet mass flowrate is 5.37 kg/m2h, I defined the
> min. desired inlet mass flowrate is 5.4 kg/m2h.
> The ATTACHED is the detailed setting of ACTIVE LAYER SPECIFICATION.
> Please have a look and tell me how to correctly define them?
>
> Please tell me how to increase the minimum mass flow rate? Where is it
> in detail? I want to get only one surface not dividing it. Please tell
> me how to get only one segmentation in detail?
>
>
> Many thanks!
>
>
> Br.
>
> wang
>
> 在 2011年2月1日 上午11:21，王洋 <wanghongyang1767 at gmail.com
> <mailto:wanghongyang1767 at gmail.com>>写 道：
>
> Dear all,
>
> I defined a active layer, but it shows ERROR as follows:
>
>
>
>
> Fatal Error at time : 0.350000
> Generated by Unit : 4
> Generated by Type : 56
> Message : Specific fluid mass flow of active
> layer in surface 7 below minimum value of 5.35 kg/m2h Please,
> increase the minimum mass flow rate or use the autosegmentation
> feature of TRNBuild for subdividing the surface.
>
>
>
> But the min. allowed inlet mass flowrate is 5.37 kg/m2h, I defined
> the min. desired inlet mass flowrate is 5.4 kg/m2h.
> The ATTACHED is the detailed setting of ACTIVE LAYER
> SPECIFICATION. Please have a look and tell me how to correctly
> define them?
>
> Please tell me how to increase the minimum mass flow rate? Where
> is it in detail? I want to get only one surface not dividing it.
> Please tell me how to get only one segmentation in detail?
>
>
> Many thanks!
>
>
> Br.
>
> wang
>
> 2011/1/31 <trnsys-users-request at cae.wisc.edu
> <mailto:trnsys-users-request at cae.wisc.edu>>
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> 1. Re: Using Equations with Initial Values (David BRADLEY)
>
>
> ---------- 已转发邮件 ----------
> From: David BRADLEY <d.bradley at tess-inc.com
> <mailto:d.bradley at tess-inc.com>>
> To: "Aaron J. Danenberg" <danenberg at hartford.edu
> <mailto:danenberg at hartford.edu>>
> Date: Mon, 31 Jan 2011 11:54:09 -0600
> Subject: Re: [TRNSYS-users] Using Equations with Initial Values
> Aaron,
> Type93 will do exactly that.
> Best,
> David
>
>
> On 1/31/2011 11:42, Aaron J. Danenberg wrote:
>>
>> In the simulation studio I am using the equation feature.
>> For the first time step, I need a variable in the equation
>> to be some defined constant value, for the following time
>> step I need that variable to be the output of another
>> component of the previous time step. Does anyone know how to
>> do this?
>>
>> Aaron J. Danenberg
>>
>> University of Hartford
>>
>> Mechanical Engineering Graduate Student
>>
>> danenberg at hartford.edu <mailto:danenberg at hartford.edu>
>>
>>
>> _______________________________________________
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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>
>
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> http://www.trnsys.com
>
>
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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
http://www.tess-inc.com
http://www.trnsys.com
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