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Re: [EnergyPlus_Support] help microCHP model
Giovanni, you said the simulation was working well in V2.2 except for
the first 10 days and then did not work well in V3.0 (large difference
in temperature). Are there any new errors in the error file? I would
suggest you add report variables for node mass flow rate around the
entire plant loop and check the operation of the plant equipment in both
V2.2 and V3.0. Also report node set point temperatures if you are not
already doing so. See if you can see equipment working correctly in V2.2
and then not working correctly in V3.0. Did you use the EnergyPlus
transition program to change from V2.2 to V3.0? Let us know what you
find. This exercise will also give you a better understanding of the
operation of plant loops. This support site is a user-to-user forum so
you might also try the other E+ support site where E+ developers will
help you - energyplus-support@xxxxxxxx - you can also attach your file
to the email. By the way, your English is pretty good.
Giovanni Matarrese wrote:
> Hello, first sorry for my bad english, I'm trying to improve my
> knowledge of this language.
> I'm Giovanni Matarrese from Italy
> I'm new of the group, I've just joined it.
> I'm a student of mechanical engeneering and I'm working about a
> microcogeneneration plant for my thesis work.
> I began editing an existing model built in energy plus 2.1 where the
> microchp and the auxiliary boiler where modelled by two purchased hot
> water(one for each device) because the micro chp model still did not
> work well when this model was created by the students who worked on in
> the past.
> So I first sobstituted these purchased with a Boiler:simple device for
> the boiler and with the MicroCHP modul for the ICE cogenerator and I
> inserted the device parameters too in the 2.2 version of energyplus.
> I also put the micro chp device on the supply of the engine loop and
> the water tank heater on the demand side of the engine loop, while the
> heating loop remained the same of the old model excpet of the
> sobstitution of boiler to the purchased hot water.
> this model works quite well, except the first 10 days of the
> simulation, where temperatures calculated by the software are a little
> higher than they should be.
> The real problem is that when I try to export this model on the new
> version of energyplus(the 3.0) results of the temperatures are always
> very higher than they sholud be(they're about 50 celsius degrees while
> they should be about 20).
> Do you now the reason of this problem? can you help me?
> thank you very much for your attention and your kindness.
>
> Giovanni Matarrese
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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