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[EnergyPlus_Support] Re: program crashed after adding Induction unit

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: program crashed after adding Induction unit
From: "miaoworld" <eric.yang@xxxxxxxxxxxxxx>
Date: Mon, 26 Feb 2007 16:27:32 -0000
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I moved the induction cooling coil branch from the secondary demand 
loop to the primary demand loop. I also modified zone mixer and 
return air path objects.  Now the program is running without 
crashing again.

"

ZONE MIXER,
    119113 Zone Mixer,      !- Mixer Name
    119113 In Node,        !- Zone Outlet_Node (outlet for ATU)
    119113 Zone Equip Inlet,!- Inlet_Node_1 
    119113 Cooling coil air outlet;  !- Inlet_Node_2 CW coil air 
outlet
    
ZONE RETURN AIR PATH,
    119113 Return Path,   !- Return Air Path Name
    119113 In Node,  !- Return Air Path Outlet Node
    ZONE MIXER,              !- KEY--System Component Type 1
    119113 Zone Mixer;    !- Component Name 1    
    
"
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Eric Yang" 
<eric.yang@...> wrote:
>
> Thanks, Mike.   The crash happened after I replace VAV reheat 
component
> with FPIU components.  The program didn't crash with VAV reheat
> component. However, the results with VAV reheat component show 
that heat
> exchanger condenser side flow rate is zero, but cooling tower flow 
rate
> is not zero.  I don't know whether it relates to this crash or 
not.  
> 
>  
> 
> Thanks in advance.
> 
>  
> 
> Eric (Miao)
> 
> ________________________________
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Michael J.
> Witte
> Sent: Monday, February 12, 2007 6:28 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: Re: [EnergyPlus_Support] program crashed after adding 
Induction
> unit
> 
>  
> 
> I have reproduced the crash (after modifying the input to stay 
within
> the 
> standard max/min limits in EnergyPlus). It is related to the plant
> flows, but 
> I do not see the problem in the input. I will ask someone else for 
help.
> 
> Mike
> 
> On 12 Feb 2007 at 17:12, miaoworld wrote:
> 
> > Hi, 
> > 
> > I have tried to add an induction unit (FPIU) to the system and 
the 
> > program crashed without enough indication of the problem. I have 
> > tried to track where the problem, but no luck...
> > 
> > The zone with FPIU is 119113 and the related components are 
listed at 
> > the end of the file (NF-EXP-CB.idf). 
> > 
> > For convenience, I also include them here at the end of this 
letter.
> > 
> > Many thanks for your help. I really appreciate it.
> > 
> > Eric (Miao)
> > 
> > 
> > 
> > "NODE LIST,
> > 119113 In Nodes, !- Node List Name
> > 119113 in Node; !- Node_ID_1 Terminal unit air outlet, 
> > but inlet for zone
> > 
> > NODE LIST,
> > 119113 Exh Nodes, !- Node List Name
> > 119113 ATU induc node; !- Node_ID_1
> > 
> > 
> > SINGLE DUCT:CONST VOLUME:4 PIPE INDUC,
> > 119113 FPIU, !- Name of unit
> > COMPACT HVAC-ALWAYS 1, !- System availability schedule
> > autosize, !- Maximum total air volume flow rate 
> > {m3/s}
> > 2.0, !- Induction ratio
> > 119113 Zone Equip Inlet, !- Terminal unit supply air inlet 
> > node
> > 119113 ATU Induc Node, !- Terminal unit induced air inlet 
> > node
> > 119113 In Node, !- Terminal unit air outlet node
> > 119113 Reheat Coil HW Inlet, !- Hot water control node
> > 119113 Cooling Coil CW Inlet,!- Cold water control node
> > COIL:Water:SimpleHeating,!- Heating coil object
> > 119113 Reheat Coil, !- Heating coil name
> > autosize, !- Max hot water flow {m3/s}
> > 0.00001, !- Min hot water flow {m3/s}
> > 0.002, !- Heating Convergence Tolerance
> > COIL:Water:Cooling, !- Cooling coil object
> > 119113 Cooling Coil, !- Cooling coil name
> > autosize, !- Max cold water flow {m3/s}
> > 0.00001, !- Min cold water flow {m3/s}
> > 0.002, !- Cooling Convergence Tolerance
> > 119113 Zone Mixer; !- Zone mixer component name
> > 
> > ZONE MIXER,
> > 119113 Zone Mixer, !- Mixer Name
> > 119113 Return Outlet, !- Zone Outlet_Node (outlet for ATU)
> > 119113 Zone Equip Inlet,!- Inlet_Node_1 
> > 119113 Cooling coil air outlet; !- Inlet_Node_2 CW coil air 
> > outlet
> > 
> > ZONE RETURN AIR PATH,
> > 119113 Return Path, !- Return Air Path Name
> > 119113 Return Outlet, !- Return Air Path Outlet Node
> > ZONE MIXER, !- KEY--System Component Type 1
> > 119113 Zone Mixer; !- Component Name 1 
> > 
> > 
> > !add by Eric
> > COIL:Water:Cooling,
> > 119113 Cooling Coil, !- Coil Name
> > COMPACT HVAC-ALWAYS 1, !- Available Schedule
> > autosize, !- Design Water Flow Rate of Coil {m3/s}
> > autosize, !- Design Air Volume Flow Rate {m3/s}
> > autosize, !- Design Inlet Water Temperature {C}
> > autosize, !- Design Inlet Air Temperature {C}
> > autosize, !- Design Outlet Air Temperature {C}
> > autosize, !- Design Inlet Air Humidity Ratio {kg-
> > H2O/kg-air}
> > autosize, !- Design Outlet Air Humidity Ratio {kg-
> > H2O/kg-air}
> > 119113 Cooling Coil CW Inlet, !- Coil_Water_Inlet_Node
> > 119113 Cooling Coil CW Outlet, !- Coil_Water_Outlet_Node
> > 119113 Supply Inlet, !- Coil_Air_Inlet_Node
> > 119113 Cooling coil air outlet, !- Coil_Air_Outlet_Node
> > SimpleAnalysis, !- Type of Analysis
> > CrossFlow; !- Heat Exchanger Configuration 
> > 
> > 
> > !Add by Eric
> > BRANCH,
> > 119113 Cooling Coil CW Branch, !- Branch Name
> > , !- Maximum Branch Flow Rate {m3/s}
> > COIL:Water:Cooling, !- Comp1 Type
> > 119113 Cooling Coil, !- Comp1 Name
> > 119113 Cooling Coil CW Inlet,!- Comp1 Inlet Node Name
> > 119113 Cooling Coil CW Outlet, !- Comp1 Outlet Node Name
> > ACTIVE; !- Comp1 Branch Control Type"
> > 
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov <http://www.energyplus.gov> 
> > 
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> <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.
> > 
> > EnergyPlus Documentation is searchable. Open EPlusMainMenu.idf 
and
> press the "search" button.
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support 
> EnergyPlus-Support@... <mailto:EnergyPlus-Support%40gard.com> 
> 
>  
> 
> 
> 
> [Non-text portions of this message have been removed]
>




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References:
- RE: [EnergyPlus_Support] program crashed after adding Induction unit
  - From: Eric Yang

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