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Re: [EnergyPlus_Support] Warning : Potention node connection error
A cooling coil is not a valid component on the zone side of an air loop. Only
plenums, splitters, and air terminal units (such as VAV boxes, direct air etc.)
are valid.
Mike
On 15 Jun 2005, at 19:19, marieodeline wrote:
> Dear all,
>
> I tried to simulate an HVAC system composed by:
> - An air primary loop: Air Loop inlet node, Furnace (supply fan +
> Gas:HeatingCoil), Air Loop Outlet Node
>
> - A zone equipment loop : Zone Equipment Inlet Node, a zone splitter,
> 1 branch with a direct air system, a Coil:WaterCooling, which is
> connected to a zone entrance, a zone mixer, and the Return Air mixer
> outlet node.
>
> - A chilled water loop composed by:
> The supply side : CW Pump branch, Splitter, 2 branches (Purchased
> Cooling Branch, Cooling Supply Bypass), Mixer, Cooling Supply Side
> Outlet
> The demand side : Cooling Demand Inlet, Splitter, 2 branches (
> Cooling Coil Zone 1 Branch, Cooling Demand Bypass Branch), Mixer,
> Cooling Demand Outlet
>
> Everytime I try to simulate these equipments, some errors appear :
>
> I checked that 'Zone 1 Inlet Node' is connected with the zone
> splitter (splitter outlet node), with the direct air (zone supply air
> node name) and with the cooling coil (air inlet node). I tried to
> reverse connections order (first cooling coil, then direct air), but
> same errors occur. I hope that somebody will be able to explain to me
> the wrong connection I am doing. There are also connection mistakes
> in the water loop (all of the same type), would anybody have an idea
> about it?
>
> Thank you in advance for your help!
>
> Marie Odeline
>
> Program Version,EnergyPlus 1.2.1.022, 2005-06-15 14:12,IDD_Version
> 1.2.1.022
> ** Severe ** Deprecated field -- Calculate Solar Reflections is
> now embodied in the Solar Distribution Field.
> ** ~~~ ** Please note that this field will be deleted in
> future versions.
> ** Severe ** Node ZONE 1 INLET NODE connects to no component
> ** ~~~ ** Occurs in Supply Air Path=FURNACESUPPLYPATH
> ** Severe ** An outlet node in Air Primary Loop AIR PRIMARY LOOP
> is not connected to any zone
> ** ~~~ ** Could not match ZoneEquipGroup Inlet Node="ZONE
> EQUIPMENT INLET NODE" to any Supply Air Path or controlled zone
> ** Fatal ** Preceding errors cause termination
> ************* Fatal error -- final processing. More error
> messages may appear.
> ************* 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
> ** Warning ** Node Connection errors shown during "fatal error"
> processing may be false because not all inputs may have been
> retrieved.
> ** Warning ** Potential Node Connection Error for object
> FURNACE:BLOWTHRU:HEATONLY, name=GAS FURNACE 1
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : AIR LOOP INLET NODE
> ** ~~~ ** Outlet Node: AIR LOOP OUTLET NODE
> ** Warning ** Potential Node Connection Error for object PIPE,
> name=COOLING DEMAND SIDE INLET PIPE
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : CW DEMAND INLET NODE
> ** ~~~ ** Outlet Node: CW DEMAND ENTRANCE PIPE OUTLET NODE
> ** Warning ** Potential Node Connection Error for object PIPE,
> name=COOLING DEMAND SIDE BYPASS
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : CW DEMAND BYPASS INLET NODE
> ** ~~~ ** Outlet Node: CW DEMAND BYPASS OUTLET NODE
> ** Warning ** Potential Node Connection Error for object PIPE,
> name=CW DEMAND SIDE OUTLET PIPE
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : CW DEMAND EXIT PIPE INLET NODE
> ** ~~~ ** Outlet Node: CW DEMAND OUTLET NODE
> ** Warning ** Potential Node Connection Error for object PIPE,
> name=SUPPLY SIDE OUTLET PIPE
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : SUPPLY SIDE EXIT PIPE INLET NODE
> ** ~~~ ** Outlet Node: CW SUPPLY OUTLET NODE
> ** Warning ** Potential Node Connection Error for object
> PUMP:VARIABLE SPEED, name=CW CIRC PUMP
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : CW SUPPLY INLET NODE
> ** ~~~ ** Outlet Node: CW PUMP OUTLET NODE
> ** Warning ** Potential Node Connection Error for object
> PURCHASED:CHILLED WATER, name=PURCHASED COOLING
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : PURCHASED COOLING INLET NODE
> ** ~~~ ** Outlet Node: PURCHASED COOLING OUTLET NODE
> ** Warning ** Potential Node Connection Error for object PIPE,
> name=SUPPLY SIDE BYPASS
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : CW SUPPLY BYPASS INLET NODE
> ** ~~~ ** Outlet Node: CW SUPPLY BYPASS OUTLET NODE
> ** Warning ** Potential Node Connection Error for object
> COIL:WATER:COOLING, name=COOLING COIL ZONE 1
> ** ~~~ ** Node Types are still UNDEFINED -- See Branch/Node
> Details file for further information
> ** ~~~ ** Inlet Node : COOLING COIL ZONE 1 WATER INLET NODE
> ** ~~~ ** Outlet Node: COOLING COIL ZONE 1 WATER OUTLET NODE
> ************* There were 9 node connection errors noted.
> *************
> ************* ===== Final Error Summary =====
> ************* The following error categories occurred. Consider
> correcting or noting.
> ************* Node Connection Errors
> ************* Deprecated Features
> *************
> ************* EnergyPlus Terminated--Fatal Error Detected. 10
> Warning; 3 Severe Errors
>
>
>
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
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>
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>
>
>
>
>
>
>
========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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