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Re: [EnergyPlus_Support] Re:Re: Loop Setup error
Theoretically, the heat pump should work in series with the source side of the
water heater, but I cannot say that I have actually tried that myself.
The error message "the inlet node of my heat pump does not find a matched
outlet node" indicates that something is misconnected or connected in reverse.
Search the bnd output file for the node name mentioned in the error. This may
help you discover the problem.
Mike
On 20 Aug 2005, at 5:10, energypluser wrote:
> Hi Mike
>
> I have checked my loop setting according to your suggustion. Some of the errors
> are fixed. But one serve error still remains. I connect my water-to-water heat
> pump directly with a water heater. Then the branch is in the supply side of my
> plant loop. E+ still tell me that the inlet node of my heat pump does not find a
> matched outlet node. i am sure that the inlet node and outlet node of my heat
> pump show up in the Idf file twice. I just can not undestand why the error shows
> up. So I ask the question again: Can the water heater can be linked with a plant
> component directly? Or Should the water heater be in a unique branch and work
> with other plant components parallelly? Thank you in advacne.
>
> Charlie
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" <mjwitte@g...>
> wrote: > Every pair of inlet/outlet nodes for a plant component must be listed
> on a > branch. Every branch must be part of a branch list, and every branch
> list must > be referenced by a plant loop or condenser loop. The error message
> below > indicate that one of these conditions is not being met. > > To solve
> such errors: > > 1. use a text editor, copy one of the node names listed in the
> error message > and past it into the search (or find) of the editor and search
> the idf file for > occurences of this node name. It should appear at least
> twice, once in the > component, and once in a branch. > > If the name does not
> appear twice, then there is a typo either in the component > node name or the
> node name on the branch. > > 2. If the node name appears twice in the right
> places, then select the > associated branch name and search the idf file this.
> Does the branch name > appears on a branch list? > > 3. If that is OK, then
> select the branch list name and search for it. Does it > appear in a loop
> object? > > In all of these searches, do not retype the name, but select it or
> copy/paste > it, otherwise a typo may be overlooked. Fixing the connection
> errors should > solve the svg drawing issue. > > Mike > > > On 18 Aug 2005, at
> 2:49, energypluser wrote: > > > Hi Everyone > > > > I have some questions about
> the loop setup in E+ > > > > 1.Is the water heater able to connect directly with
> a > > cooling/heating plant in a loop? > > 2. Can we locate the water heater in
> a plant loop branch to work > > with other heating/cooling component parallelly
> rather than working > > alone ? > > 3. I link a heat pump heating to my water
> heater for the purpose of > > modeling the heater as a thermal storage tank. I
> see the svg file. > > It shows that my heat pump is in the condenser loop, but
> the water > > heater loop doesn't have this component.And these warning and
> errors > > shows up. > > > > ** Warning ** Potential Node Connection Error for
> object > > HEATPUMP:WATERTOWATER HEATING, name=IHEATPUMP HEATING 2 > > **
> ~~~ ** Node Types are still UNDEFINED -- See Branch/Node > > Details file
> for further information > > ** ~~~ ** Inlet Node : GSHPHEATING LOADSIDE
> INLET NODE 2 > > ** ~~~ ** Outlet Node: GSHPHEATING LOADSIDE OUTLET
> NODE 2 > > ** Warning ** Potential Node Connection Error for object WATER > >
> HEATER:MIXED, name=IWATER TANK > > ** ~~~ ** Node Types are still
> UNDEFINED -- See Branch/Node > > Details file for further information > > **
> ~~~ ** Inlet Node : IWATER TANK USE SIDE INLET NODE > > ** ~~~ **
> Outlet Node: IWATER TANK USE SIDE OUTLET NODE > > ** Warning ** Node
> Connection Error for object WATER > > HEATER:MIXED, name=IWATER TANK > > **
> ~~~ ** Load Side Water Nodes not on any Branch or Parent > > Object > >
> ** ~~~ ** Inlet Node : IWATER TANK USE SIDE INLET NODE > > ** ~~~
> ** Outlet Node: IWATER TANK USE SIDE INLET NODE > > ** Warning ** Node
> Connection Error for object > > HEATPUMP:WATERTOWATER HEATING, name=IHEATPUMP
> HEATING 2 > > ** ~~~ ** Hot Water Nodes not on any Branch or Parent
> Object > > ** ~~~ ** Inlet Node : GSHPHEATING LOADSIDE INLET NODE 2 > >
> ** ~~~ ** Outlet Node: GSHPHEATING LOADSIDE OUTLET NODE 2 > > > >
> Please help me to fix it > > Thank you in advance. > > > > Charlie > > > > > > >
> > > > > > > > The primary EnergyPlus web site is found at: > >
> http://www.energyplus.gov > > > > The group web site is: > >
> http://groups.yahoo.com/group/EnergyPlus_Support/ > > > > Attachments are not
> allowed -- please post any files to the appropriate folder > > in the Files area
> of the Support Web Site. > > > > Yahoo! Groups Links > > > > > > > > > > > > > >
> > > > > > > ======================================================= = > Michael
> J. Witte, GARD Analytics, Inc. > EnergyPlus Testing and Support >
> EnergyPlus-Support@g...
>
>
>
>
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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