[TRNSYS-users] Outputs of Type 56 !

David BRADLEY d.bradley at tess-inc.com
Fri Jun 8 13:42:40 PDT 2012


Kostas,
   Pass the Type56 outputs to Type46 for integrating and printing to a 
text file.
Best,
  david


On 6/8/2012 10:11, ts0g . wrote:
>
> Dear TRNSYS users ,
>
> I have imported a 3d model ,from trnsys 3d plug-in for sketchup, into 
> the Simulation Studio. I am using Type56 to generate my building's air 
> temperature ( TAIR ) ,
>  and the sensible heating&cooling demand of airnodes ( QHEAT-QCOOL ) . 
> I have created 5 different thermal airnodes and my question is , which 
> type should I
> use as an output in order to retrieve my results, after simulating, in 
> a .txt file so I can process them and compare them with some 
> theoretical measurements concerning
> these specific thermal zones.
> Thank you for your help !
>
> Kind regards,
> Kostas
>
>
>
>
>
> --Forwarded Message Attachment--
> From: d.bradley at tess-inc.com
> CC: trnsys-users at cae.wisc.edu
> To: ricardo.palomar at hotmail.com
> Date: Wed, 6 Jun 2012 14:09:13 -0500
> Subject: Re: [TRNSYS-users] Type 1716: ROTARY DESICANT DEHUMIDIFIER
>
> Ricardo,
>   Without seeing the input file, its hard to know what the problem 
> might be. If you can please send your project to me (directly, please 
> do not reply to the entire list) then I can have a look.
> Kind regards,
>  David
>
>
> On 6/6/2012 06:03, Ricardo Palomar Calahorra wrote:
>
>     Hello !!!
>
>     I´m trying to use the type 1716: ROTARY DESICANT DEHUMIDIFIER, but
>     I´m having always the same problem, when I run the simulation the
>     outputs 8 and 12 (Regeneration air relative humidity,
>     and Condensate flow rate) are "0.00". And the outputs 2 and 3
>     (Process air outlet humidity ratio, and Process air
>     outletrelativehumidity) are inconsistent.
>
>     Exist any problem running this type?
>
>     Thanks !!!
>
>
>     _______________________________________________
>     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
> 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.trnsys.com
>
>
> --Forwarded Message Attachment--
> From: d.bradley at tess-inc.com
> CC: trnsys-users at cae.wisc.edu
> To: mattia.rio at mail.polimi.it
> Date: Wed, 6 Jun 2012 14:14:47 -0500
> Subject: Re: [TRNSYS-users] Shading groups
>
> Mattia,
>   I think you will have to be a little creative here. Shading devices 
> in Trnsys3D are assumed to be opaque as you know so I don't think you 
> can define the shading surface in there. You could use Type34, which 
> models simple overhangs and/or wingwalls. That model also assumes an 
> opaque shader but it gives outputs for various shading fractions and 
> view factors. You may be able to use those and the unshaded radiation 
> from your weather component to get an estimate of the radiation that 
> comes through your not-quite-opaque device. Lastly, Type56 allows you 
> to enter a shading factor for any given window. You may be able to 
> treat your shaders in that manner.
>
>   Unfortunately, there is not a direct way to treat semitransparent 
> shaders unless you would care to modify Type34.
> Kind regards,
>  David
>
>
> On 6/6/2012 10:11, MATTIA ANDREA RIO wrote:
>
>     Hi!!! i have a little problem with my imported 3d model from
>     trnsys 3d plug-in for sketchup.
>
>     I have posted a picture that show my 3d model in sketchup; so, as
>     you can see, all of the triangular surfaces (into red circle), are
>     made in perforated corten steel, and i need to give a shading
>     coefficient to their, otherwise the  program will do the
>     simulations considering the shading surfaces opaque; but actually
>     they are not matt.
>
>     if someone have any ideas about how I can do.....
>
>     ----------------------------------------------------------------
>     This message was sent using IMP, the Internet Messaging Program.
>
>
>
>     _______________________________________________
>     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
> 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.trnsys.com
>
>
> --Forwarded Message Attachment--
> From: d.bradley at tess-inc.com
> CC: trnsys-users at cae.wisc.edu
> To: damien.casetta at gmail.com
> Date: Wed, 6 Jun 2012 14:27:41 -0500
> Subject: Re: [TRNSYS-users] Water-to-water heat pump - Heat rate to 
> load control
>
> Damien,
>   In my experience, there are relatively few heat pumps available on 
> the market that can do what you are trying to do. Most heat pumps have 
> a fairly fixed capacity (some have multiple stages) so that they have 
> an easier time maintaining a fixed temperature rise than they do in 
> maintaining a fixed temperature outlet. There is at least one notable 
> exception to this; an air-to-water heat pump that has a variable speed 
> compressor that allows it to modulate and maintain a target outlet 
> temperature.
>
>   Type927 is a temperature level control device meaning that it is 
> looking for inlet water conditions on both sides and for a control 
> signal. If you have obtained your heating loads from some other 
> software tool, I would recommend that you read them into TRNSYS using 
> Type9 and impose them on a water stream using Type682 from the TESS 
> Loads and Structures library. I would then place a thermostat sensing 
> water return temperature in the loop and I would use its output to 
> turn on the loop pump and the Type927 heat pump. You will not get a 
> constant supply temperature of course but in reality, a single stage 
> (or even multi stage) heat pump can't really give you a constant 
> supply temperature; it can only give you a supply temperature that 
> hovers around a set point.
>
>   If you are using Type56 to generate your building's heating demand, 
> I would take it out of energy rate control (ie turn OFF the automatic 
> heating and cooling types in TRNBuild), and allow the zone 
> temperatures to float. I would then use a thermostat watching the zone 
> air temperature and some kind of delivery device (a fan coil, radiant 
> floors, etc.) to deliver the hot water from the Type927 to the zone.
>
> Kind regards,
>  david
>
>
> On 6/6/2012 12:20, Damien Casetta wrote:
>
>     Hi,
>
>     I am trying to handle this problem by controlling the temperature.
>     Let me remind you that I want to control the heat load of an heat
>     pump in heating mode.
>
>     Here is how I am trying to proceed :
>
>     - I control the temperature exiting the heat pump
>     - I fix a temperature set point (with an aquastat - heating mode)
>     at 50 C.
>     - I vary the supply temperature (entering the heat pump) according
>     to the heating demand.
>
>     The heating demand is based on hourly loads.
>
>     What do you think about it?
>
>     I am not very satisfied but I will give it a try. I am sure there
>     is a much simpler way to do it.
>
>
>     Thanks in advance for your help.
>
>     Best regards,
>
>     On 1 June 2012 18:10, Damien Casetta <damien.casetta at gmail.com
>     <mailto:damien.casetta at gmail.com>> wrote:
>
>         Hi,
>
>         I am modelling a ground-source heat pump system including a
>         water-to-water heat pump (type 927), a borehole heat
>         exchanger (type 557b) and a building demand profile.
>
>         I have read a couple of messages in the archives about this
>         topic but I haven´t understood correctly the few addressing my
>         specific issue.
>
>         Here is my point. I assume the heat pump to meet the building
>         demand. The aim is then to force the heat pump load and
>         observe how the system behaves (COP, ground loop fluid
>         temperatures).
>
>         I would be able to do this with an external MATLAB code (with
>         COP values interpolated from catalog data) but it would be a
>         shame not to harness TRNSYS potential (there is no need to
>         re-invent the wheel as I read in a previous message).
>
>         Let me put in other words: how to control a heat pump load?
>
>         I have read about a trick to handle this, with a "lump"
>         temperature but I don't get the idea behind it. Any other
>         explanations is welcomed.
>
>
>
>         Thanks in advance,
>
>         Best regards,
>
>
>         -- 
>         *Damien Casetta*
>
>         *Chalmers University of Technology *| Energy and Environment|
>         Exchange student
>         *INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
>
>         +46.7.60.66.31.45
>         +33.6.71.78.03.75
>
>
>
>
>     -- 
>     *Damien Casetta*
>
>     *Chalmers University of Technology *| Energy and Environment|
>     Exchange student
>     *INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
>
>     +46.7.60.66.31.45
>     +33.6.71.78.03.75
>
>
>
>     _______________________________________________
>     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
> 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.trnsys.com
>
>
> _______________________________________________
> 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

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