I have had a look at your file posted to
Helpserve. There are so many problems with this file I am surprised it runs at
all, but not surprised it runs differently in V2.2.
First, the geometry is inside out.
You have chosen UpperLeftCorner, and CounterClockWise, but then entered the
surface vertex data in clockwise order. Your zone loads are going to be
totally wrong.
One problem is that the supply side
"Riscaldamento supply ingresso" branch has too much equipment on
it. The first branch on the supply side of a plant loop should have only
a pump. Yours has pump, waterheater, and a pipe. You need to
rearrange this loop to have just the pump on the supply side inlet, then the
water heater with a bypass around it, and then boiler on a single flow branch
after the water heater.
The problem with the node temperature
results after the CHP are likely because your bypass branch has control type
"passive" when it should be "Bypass."
The branch "Motore demand WH"
for the water heater's source side needs to have "ACTIVE" branch
control so it can make flow requests.
From:
Sent: Monday, May 18, 2009 7:49 AM
To:
Subject: [EnergyPlus_Support] Re:
AbsorbitionChiller
thank you for your answer,
it's true, I'm using the V2.2 for my simulation because, as I told in a
previous post and in a submitted ticket to the helpdesk support, the same file
that works well in V2.2, exported in V3 and later doesn't work as in the V2.2
and it gives bad results!
I noted that the absorbition chiller in V3 has generator inlet and outlet nodes
fields, but to use the new version I first need to solve the problem about the
microCHP model that in the V3 doesn't work well...
can you help me about it if I send you my file in V2.2?
--- In EnergyPlus_Support@
>
> Prior to V3.0, the absorption chiller does not use an actual loop, the
> model assumes steam and the amount of steam used is available through
> report variables Chiller Steam Consumption Rate and Chiller Steam
> Consumption. For V3.0 and later, a hot water or steam loop MAY be used
> to regenerate the absorption cycle but the use of an actual loop is
> optional. Note that the example file (V3.0 and later shown here) leaves
> the generator node names blank which means a steam loop is assumed. If
> you are using a version prior to V3.0, you must upgrade to the latest
> version in order to connect a steam or hot water loop to the absorption
> chiller. See the Input Output and Engineering Reference for more details.
>
> Chiller:Absorption,
> <snip>
> , !- Generator Inlet Node Name
> , !- Generator Outlet Node Name
> VARIABLEFLOW; !- Chiller Flow Mode
>
>
>
> In order to better serve you, a helpdesk system has been set up for
> managing EnergyPlus user support requests. The helpdesk system includes
> a download area, a knowledge base and troubleshooting area.
>
> To submit new support requests (tickets) or search the knowledge base,
> please go to http://energyplus.
> <http://energyplus.
>
> You may also submit new tickets and reply to tickets via e-mail at
> EnergyPlus-Support@
> address has been linked to the helpdesk since early May 2008.
>
> EnergyPlus_Support@
> <mailto:EnergyPlus_
> user-to-user forum, with occasional input from the EnergyPlus
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>
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>
> ** If you have an unresolved issue which was posted to the yahoo group,
> please resubmit your request to EnergyPlus-Support@
> <mailto:EnergyPlus-
> date and attach input files as needed.
>
> giovanni.matarrese wrote:
> >
> >
> > Hi,
> > I want to integrate my plant with a microCHP with an absorbition
> > chiller to make air conditioning in summer.
> > I looked at the example file"AbsorbitionChi
> > understand were the chiller takes heat for its functioning, in fanct
> > the chiller is only linked to the condenser loop and not to the
> > heating loop.
> > how can I link the thermal power producted by the microchp to the
> > absorbition chiller?
> > thank you.
> >
> > Giovanni
> >
> >
>
> --
> Richard A. Raustad
> Senior Research Engineer
>
>
>
>
> Phone: (321) 638-1454
> Fax: (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.
>
> UCF - From Promise to Prominence: Celebrating 40 Years
>
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