RE: negative solar radiation

[Bin Li <bl84@xxxxxxxxxxx>]

Hi, Jeroen Van der,

I can't agree with you any more. I met exactly the same terrible problems
before when I was trying to save some files, especially when there were some
macros in the projects. That was like a nightmare. :( It seems that IISiBat
doesn't like Macro. Here is my clumsy method, but at least it works for me:
	Never copy/paste macro. Whenever you have to do it, explode it at first.
And then copy/paste the subcomponents to anywhere you want. Make use you
save the project before you use macro again.

Bin


> -----Original Message-----
> From: owner-trnsys@xxxxxxxxxxxxxxxxxxx
> [mailto:owner-trnsys@xxxxxxxxxxxxxxxxxxx]On Behalf Of Jeroen Van der
> Veken
> Sent: Tuesday, June 15, 2004 2:10 PM
> To: trnsys@xxxxxxxxxxxxxxxxxxx
> Subject: Re: negative solar radiation
>
>
> the component order :
> 13 equations, mainly used to control the radiators and the heater
> 3 type 9's
> type 33e
> type 16h
> type 69
> type 56
> type 41 (schedule)
> 5 type 14 (day/night schedules)
> 5 on/off controllers (for shading system)
> 40 tubes, diverters and tee pieces
> type 3d (pump)
> type 6 (ideal heater)
> 9 times a radiator system with type 137 (PID-controller), tubes,
> diverter, tee piece, type 177 (mix of 180 and 80),
> type 65
> 2 type 93 (value recall of zone temperatures, to send to the ambient
> temperature input of the PID-controllers, radiators and tubes and use
> for ventilation air temperature in toilet and bath room.)
> type 25c
> probably this is not really helping you much, I will sent you the TPF
> and relating files.
>
> I tried to create a macro of the whole system and copy/paste that to an
> empty project, but then my computer crashed, and my file was lost
> forever. When Isibat refuses to save it is also quite unstable.
> Even saving every five minutes on the hard disk and on a memory stick
> doesn't help much, as the file on the memory stick can be opened but
> can't be saved either.
> What do you mean with replicate the error ? I can't save it when it
> happens, since that is the problem...
> I will download the updated version of the Isibat, maybe that will help...
>
>
> Jeff Thornton wrote:
>
> > At 02:50 PM 6/15/2004 +0200, you wrote:
> >
> >> That is no problem anymore if I lower the timestep to 0.1 hour and
> >> less, and/or reduce the power of the radiation. However, with smaller
> >> timesteps I get the error
> >> ***** ERROR *****        UNIT  20 TYP # 56
> >> NEGATIVE VALUE OF SOLAR RADIATION FOR  5. ORIENTATION ENCOUNTERED.
> >> SIMULATION STOPPED.
> >> If I follow the radiation from the radiation processor, this doesn't
> >> seem the case. It seems that the problem is in Type56.
> >
> >
> > This can happen sometimes if the component order in IISiBat isn't
> > ideal.  We've noticed it a few times when we have Type 16 followed by
> > Type 56 followed by a Type 34 shading device.  Type 56 gets the
> > incidence angle from Type 16 and an older value of radiation from Type
> > 34 at the first iteration and errors out.  Check for situations like
> > this.
> >
> >> And to make it really frustrating, TRNSYS doesn't appear to like my
> >> TPF-files and announces from time to time when I want to save the
> >> project "save failed". Trying to save it on another disk or diskette
> >> doesn't work and when I reboot my computer, the whole file seems to
> >> have dissapeared from the hard disk. Not only the latest changes, the
> >> whole thing.
> >
> >
> > If that happens, copy everything in the project and paste it to a new
> > project - then save the new project.  Can you replicate the error so
> > we can forward it on to the IISiBat developers?
> >
> > Jeff
> >
> >
> >
> ******************************************************************
> ***************
> >
> > Thermal Energy System Specialists (TESS)
> > Jeff Thornton                                   2916 Marketplace Drive
> > Principal                                       Suite 104
> > Phone:  (608) 274-2577                  Madison WI 53719
> > Fax:  (608) 278-1475                            USA
> > E-mail:   thornton@xxxxxxxxxxxx
> > Web Page:       www.tess-inc.com
> >
> > "Providing software solutions for today's energy engineering projects"
> >
> ******************************************************************
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> >
> >
> >
>