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Re: [TRNSYS-users] Type 9 data reader
Stefan,
The first thing to check is that you specify your simulation time step,
you do not just set the units to "minutes" and set a value of 1. The
Studio rounds that value and writes it to the input file as a decimal
hour equivalent and it isn't always accurate (ie you don't end up with
exactly 15 timesteps per data file line in your case).
Instead, write the following in the simulation cards window at the
bottom of the "control cards" (where you set the time step)
EQUATIONS 1
delt = 1/60
then select "string" for the units of your time step and set the time
step value to "delt"
That will ensure that you have a true 1 minute timestep.
As for the other parameters of Type9, I suspect that what is happening
is that the interpolation of your data is getting messed up due to an
initial value problem. My solution (as clumsy and unscientific as it is)
is to fiddle around with the initial value, instantaneous/average, and
mode parameters until I get a Type65 plot that looks like it "should" look
Best,
David
On 7/19/2010 06:10, thiemann.stefan@vdi.de wrote:
Hi everybody,
i tried to read a data file with a 1/4 h time interval of average data
in a 1 min simulation. If I set "Averareous or instantenous value" to
"average" I got some wrong curve and the values seemed to be mirrored
on the x axis. Can anybody help me to better understand the
behanviour of type 9?
P.S: I doesnt seem to depend on the data reader mode...
Many thanks, Stefan
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