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Re: [EnergyPlus_Support] Re: HELP: hot storage connected to solar panels only, no back-up !
Oops, I left in some objects at the end of this message that I was
playing with. Disregard anything after:
* EnergyPlus Completed Successfully-- 1 Warning; 0 Severe
Errors; Elapsed Time=00hr 00min 14.34sec
I have deleted them in this email.....
Richard Raustad wrote:
>
>
> It is a matter of deleting all instances of the instantaneous water
> heater object. Search for the name (or type) of the instantaneous water
> heater. You will find this object in several places. In a branch object,
> an equipment list object, etc. The SolarCollectorFlatPlateWater example
> file also has a tempering valve which complicates the plant loop.
> Deleting the type and name for the instantaneous water heater where you
> find them will also point to other objects that need to be modified.
> Finally, delete the object itself. Then run the program and check for
> errors. Of course, deleting incorrectly will cause errors. The error
> messages are key to finding all the places that need to be corrected.
> The next time you post here, include some of the messages.
>
> Starting with the SolarCollectorFlatPlateWater example (I used WordPad
> as the text editor, it is easy to search and cut-n-paste)), if you only
> delete the WaterHeater:Mixed object with the name Instantaneous Water
> Heater, the first message that appears is this:
>
> ** Severe ** During Branch Input, Invalid Component Name
> input=INSTANTANEOUS WATER HEATER
> ** ~~~ ** Component type=WATERHEATER:MIXED
> ** ~~~ ** Occurs on Branch=STORAGE TANK USE OUTLET BRANCH
>
> Search for the branch name Storage Tank Use Outlet Branch and you will
> find this object. The tank was connected using this branch object.
> Change it to a pipe and run the program again.
>
> >From this:
> Branch,
> Storage Tank Use Outlet Branch, !- Name
> 0, !- Maximum Flow Rate {m3/s}
> WaterHeater:Mixed, !- Component 1 Object Type <<<<<<<<<<<<<<
> Instantaneous Water Heater, !- Component 1 Name <<<<<<<<<<<<<<<
> Instantaneous Water Heater Inlet Node, !- Component 1 Inlet Node Name
> Instantaneous Water Heater Outlet Node, !- Component 1 Outlet Node Name
> PASSIVE; !- Component 1 Branch Control Type
>
> To this, also add the new pipe object. I used the same node names as
> before and also used the WaterHeater:Mixed object's name as the name for
> the pipe. You can change these later.
>
> Branch,
> Storage Tank Use Outlet Branch, !- Name
> 0, !- Maximum Flow Rate {m3/s}
> Pipe:Adiabatic, !- Component 1 Object Type
> Instantaneous Water Heater, !- Component 1 Name
> Instantaneous Water Heater Inlet Node, !- Component 1 Inlet Node Name
> Instantaneous Water Heater Outlet Node, !- Component 1 Outlet Node Name
> PASSIVE; !- Component 1 Branch Control Type
>
> And add this pipe object, then run the program again.
>
> Pipe:Adiabatic,
> Instantaneous Water Heater, !- Name
> Instantaneous Water Heater Inlet Node, !- Inlet Node Name
> Instantaneous Water Heater Outlet Node; !- Outlet Node Name
>
> Then you will get this as the first message:
>
> ** Severe ** During PlantEquipmentList Input, Invalid Component Name
> input=INSTANTANEOUS WATER HEATER
> ** ~~~ ** Component type=WATERHEATER:MIXED
> ** ~~~ ** Input error in PlantEquipmentList=DHW PLANT EQUIPMENT
>
> Search for INSTANTANEOUS WATER HEATER until you find the
> PlantEquipmentList (see now why I did not change the node names yet).
>
> PlantEquipmentList,
> DHW Plant Equipment, !- Name
> TemperingValve, !- Equipment 1 Object Type
> DHW Anti-Scald Diverter, !- Equipment 1 Name
> WaterHeater:Mixed, !- Equipment 2 Object Type
> Storage Tank, !- Equipment 2 Name
> WaterHeater:Mixed, !- Equipment 3 Object Type
> Instantaneous Water Heater; !- Equipment 3 Name
>
> Change the PlantEquipmentList object to look like this (remember the
> semi-colon at the end of the last input field):
>
> PlantEquipmentList,
> DHW Plant Equipment, !- Name
> TemperingValve, !- Equipment 1 Object Type
> DHW Anti-Scald Diverter, !- Equipment 1 Name
> WaterHeater:Mixed, !- Equipment 2 Object Type
> Storage Tank; !- Equipment 2 Name
>
> Then run the program again, it seemed to work but this message appeared:
>
> Program Version,EnergyPlus, Version 3.2,IDD_Version 3.2.0.004
> ************* Testing Individual Branch Integrity
> ************* All Branches passed integrity testing
> ************* Testing Individual Supply Air Path Integrity
> ************* All Supply Air Paths passed integrity testing
> ************* Testing Individual Return Air Path Integrity
> ************* All Return Air Paths passed integrity testing
> ************* No node connection errors were found.
> ** Severe ** Branches cannot handle all the flow. Possible causes
> could be absence of Bypass,
> ** ~~~ ** or components that are manually sized incorrectly.
> Consider autosize where possible.
> ** ~~~ ** To fix add a Bypass branch or size the other
> ACTIVE/PASSIVE branches to equal the loop flow
> ** ~~~ ** Occurs in Plant Loop=DHW LOOP
> ** ~~~ ** Occurs for Splitter=DEMAND SPLITTER
> ** ~~~ ** Occurrence info=CHICAGO ANN CLG 1% CONDNS DB=>MWB,
> 07/21 18:00 - 18:15
> ** Fatal ** Preceeding conditions causes termination
>
> Now you must look at the reworked plant loop and determine why the water
> flow rate is too high for this plant. I looked at the HVAC Diagram for
> each of these files. Everything looks OK so I decided to change the DHW
> Anti-Scald Diverter to a bypass pipe (as the message suggests) since it
> is no longer needed.
>
> Change this:
> PlantEquipmentList,
> DHW Plant Equipment, !- Name
> TemperingValve, !- Equipment 1 Object Type
> DHW Anti-Scald Diverter, !- Equipment 1 Name
> WaterHeater:Mixed, !- Equipment 2 Object Type
> Storage Tank; !- Equipment 2 Name
>
> To this (pipes are not listed in the equipment list):
> PlantEquipmentList,
> DHW Plant Equipment, !- Name
> WaterHeater:Mixed, !- Equipment 2 Object Type
> Storage Tank; !- Equipment 2 Name
>
> Delete this object:
>
> TemperingValve,
> DHW Anti-Scald Diverter, !- Name
> DHW Anti-Scald Inlet Node, !- Inlet Node Name
> DHW Anti-Scald Outlet Node, !- Outlet Node Name
> Storage Tank Use Outlet Node, !- Stream 2 Source Node Name
> Instantaneous Water Heater Outlet Node, !- Temperature Setpoint
> Node Name
> DHW Use Side Pump Outlet;!- Pump Outlet Node Name
>
> And change this branch to be a pipe (also change this to be a passive
> component and add the new pipe):
>
> Branch,
> Storage Tank Tempering Branch, !- Name
> 0, !- Maximum Flow Rate {m3/s}
> Pipe:Adiabatic, !- Component 1 Object Type
> DHW Anti-Scald Diverter, !- Component 1 Name
> DHW Anti-Scald Inlet Node, !- Component 1 Inlet Node Name
> DHW Anti-Scald Outlet Node, !- Component 1 Outlet Node Name
> PASSIVE; !- Component 1 Branch Control Type
>
> Pipe:Adiabatic,
> DHW Anti-Scald Diverter, !- Name
> DHW Anti-Scald Inlet Node, !- Component 1 Inlet Node Name
> DHW Anti-Scald Outlet Node; !- Component 1 Outlet Node Name
>
> This file now runs to completion and you can investigate if water is
> actually flowing through the new bypass pipe (report the bypass pipe
> outlet node mass flow rate). You can also delete the report variable
> that is no longer used (TEMPERING VALVE FLOW FRACTION).
>
> Program Version,EnergyPlus, Version 3.2,IDD_Version 3.2.0.004
> ************* Testing Individual Branch Integrity
> ************* All Branches passed integrity testing
> ************* Testing Individual Supply Air Path Integrity
> ************* All Supply Air Paths passed integrity testing
> ************* Testing Individual Return Air Path Integrity
> ************* All Return Air Paths passed integrity testing
> ************* No node connection errors were found.
> ** Warning ** The following Report Variables were requested but not
> generated
> ** ~~~ ** because IDF did not contain these elements or
> misspelled variable name -- check .rdd file
> ************* Key=*, VarName=TEMPERING VALVE FLOW FRACTION,
> Frequency=Timestep
> ************* EnergyPlus Completed Successfully-- 1 Warning; 0 Severe
> Errors; Elapsed Time=00hr 00min 14.34sec
>
> davylagre wrote:
> >
> >
> > Actually I've already do this! I was just hoping that somebody could
> > help me to delete that component in order to obtain a kind of "clean
> > work"...
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>
> > <mailto:EnergyPlus_Support%40yahoogroups.com>, "Elreq" <tolteca33@...>
> > wrote:
> > >
> > > Instead of deleting the instantaneous water heater, just put its
> > capacity to zero or schedule it to be always OFF. That is the
> easiest way.
> > >
> > > Good luck.
> > >
> > >
> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>
> > <mailto:EnergyPlus_Support%40yahoogroups.com>, "davylagre"
> > <davylagre@> wrote:
> > > >
> > > > The example.idf runs, it's not a problem! But in this example.idf,
> > there's a back-up (instantaneous water heater)! I'm trying to delete
> > this back-up but I've always many errors!
> > > > I'm really a newbie in E+ and I can't fix my problem!
> > > > If you could help me, it could be really helpful for me!
> > > >
> > > >
> > > >
> > > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>
> > <mailto:EnergyPlus_Support%40yahoogroups.com>, Edwin Cox <ebcox@> wrote:
> > > > >
> > > > > Have you modified the Example .idf? The unmodified file should
> > run without errors.
> > > > >
> > > > > --- On Wed, 6/10/09, davylagre <davylagre@> wrote:
> > > > >
> > > > > From: davylagre <davylagre@>
> > > > > Subject: [EnergyPlus_Support] HELP: hot storage connected to
> > solar panels only, no back-up !
> > > > > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>
> > <mailto:EnergyPlus_Support%40yahoogroups.com>
> > > > > Date: Wednesday, June 10, 2009, 2:30 AM
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Hi,
> > > > >
> > > > >
> > > > >
> > > > > I'm trying to model a storage tank, which is only feeded by a
> > > > >
> > > > > collector loop (no back-up). In consequence, it's only the sun
> > radiation which will permit to heat my storage tank. In order to
> > evacuate the heat from my storage tank, I want to add sinks (for
> > example) on the use side of my storage tank...I used the ExampleFile
> > given by E+: SolarCollectorFlatP lateWater but there are always many
> > severe errors!
> > > > >
> > > > >
> > > > >
> > > > > Is there anybody able to help me? Is there anybody who already
> > done this? I am a really newbie in E+
> > > > >
> > > > >
> > > > >
> > > > > Thanks !
> > > > >
> > > >
> > >
> >
> >
>
> --
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL 32922-5703
> Phone: (321) 638-1454
> Fax: (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu <http://www.fsec.ucf.edu>
>
> UCF - From Promise to Prominence: Celebrating 40 Years
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL 32922-5703
Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
UCF - From Promise to Prominence: Celebrating 40 Years
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