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Today's Topics:
1. Re: TRnsys3D skecthup plugin (Thibaut VITTE)
2. Re: Type73 - Flat-Plate Collector (Igor Grujic)
3. Re: Type 2b controller dead band problem. (Michael Bissett)
---------- 已转发邮件 ----------
From: Thibaut VITTE <thibaut.vitte@h3c-energies.fr>
To: duffy@tess-inc.com, trnsys-users@cae.wisc.edu
Date: Thu, 22 Sep 2011 19:49:03 +0200
Subject: Re: [TRNSYS-users] TRnsys3D skecthup plugin
Dear Matt,
First, I may have sound a little bit agressive ;-) , and I'm sorry but I was SO frustated to have lost 3 days of work before returning to the old method...
Yes I know quite all the tricks you've said, and I did read the manual, and did a small building, and I perfectly know I would have been able to do so in a training course within 2 hours.
But the problem is for a bigger building !! (even with the manual next to the keyboard...)
I think my problem is that I (still?) don't know how to draw perfectly from the first click in sketchup, and that I have to erase, cancel, etc. And then, it is a big mess.
Anyway, thanks for taking into account our concerns, I have my answer that some people manage to be efficient with Trnsys3D!
Best
Thibaut
---------- 已转发邮件 ----------
From: "Igor Grujic" <igor.g@gmx.at>
To: trnsys-users@cae.wisc.edu
Date: Thu, 22 Sep 2011 19:50:44 +0200
Subject: Re: [TRNSYS-users] Type73 - Flat-Plate Collector
Dear Matt,
Thanks al lot for your quick reply, but I have one more question.
If I change the timestep to 0.125 (or smaller) what’s about the weather-values? (Those are generated for 1 year (8760 hours) in 1-hour-steps).
Need to simulate a one-year-consumption of a house for which a have the hourly usage-values. Changing the time step will falsify the results, right?
(But I just gonna try it out)
Thanks again for the help
Best regards,
Igor
-------- Original-Nachricht --------
> Datum: Wed, 21 Sep 2011 10:15:24 -0500 (CDT)
> Von: "Matt Duffy" <duffy@tess-inc.com>
> An: "Igor Grujic" <igor.g@gmx.at>, trnsys-users@cae.wisc.edu
> Betreff: Re: [TRNSYS-users] Type73 - Flat-Plate Collector
> Dear Igor,First of all, please make sure that your timestep is small -
> probably under 0.125 hour. Type Type2b collector is recommended for a
> simulation like this. Honestly, there are few simulations where one should use
> Powell's method such as a PV connected to a pump. If you continue to have
> problems, please feel free to send to your local TRNSYS distributor or me.Best
> regards,Matt Duffy ----- Original Message -----From: "Igor
> Grujic" >;igor.g@gmx.at
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---------- 已转发邮件 ----------
From: Michael Bissett <mikebiscuit@gmail.com>
To: duffy@tess-inc.com
Date: Thu, 22 Sep 2011 22:50:09 +0200
Subject: Re: [TRNSYS-users] Type 2b controller dead band problem.
I have taken your advice and made the timestep, 0.125hrStill I cannot get it to work. it is still switching on the time step instead of the dead-band temp.Mike
On Wed, Sep 21, 2011 at 3:33 PM, Matt Duffy <duffy@tess-inc.com> wrote:
Dear Michael,
Please make sure that you are using a reasonable timestep such as 0.125 hr (type in terms of hours to avoid problems with the Studio's minute conversion trucation). Also, make sure that you have the latest TRNSYS and TESS Libraries versions as well.
Best regards,
Matt Duffy
----- Original Message -----
From: "Michael Bissett" <mikebiscuit@gmail.com>
Sent: Tue, September 20, 2011 12:44
Subject: Re: [TRNSYS-users] Type 2b controller dead band problem.
On Tue, Sep 20, 2011 at 1:59 PM, Angel Carrera <angel.carrera@aiguasol.coop> wrote:
Mike,
you should connect the output control function of the controller to its own input control function (Input number 4). Also, you should increase the value of parameter 1, to the default value at least (the influence of this parameter is explained at the type 2 documentation, I recommend you to read it, together with the generic section for controllers at the trnsys help)
Regards
Angel
2011/9/19 Michael Bissett <mikebiscuit@gmail.com>_______________________________________________Dear TrnsysI am experiencing problems with a simple type 2b controller.I am using a solar collector type 564bI am trying to compare the temperature of the output of the collector with output of the tank, getting a temperature difference. I have set the dead band from 4-10 degrees C.In the simulation as the temperature rises to 10degrees difference, the control signal is 1 switching the pump on correctly. but after this the controller only switches every time step. I have tried shortening the time step... and changing other parameters.. still with no success.I have attached the file.Yours SincerelyMike BissettDepartment of Electrical EngineeringUniversity of Cape TownSouth Africa
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