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Re: [EnergyPlus_Support] Re: Invalid air loop component
Yes, DXSystem (probably a bad name) is just an ordinary air loop object.
Fred Buhl
JV Dirkes II wrote:
> Thanks for your input (and patience)!
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
> <RRaustad@...> wrote:
>
>> What you describe is nearly the same as how the branch list is laid out
>> in the 5ZoneAutoDXVAV file previously mentioned.
>>
>> BRANCH,
>> VAV Sys 1 Main Branch, !- Branch Name
>> autosize, !- Maximum Branch Flow Rate {m3/s}
>> OUTSIDE AIR SYSTEM, !- Comp1 Type
>> OA Sys 1, !- Comp1 Name
>> VAV Sys 1 Inlet Node, !- Comp1 Inlet Node Name
>> Mixed Air Node 1, !- Comp1 Outlet Node Name
>> PASSIVE, !- Comp1 Branch Control Type
>> DXSystem:AirLoop, !- Comp2 Type
>> DX Cooling Coil System 1,!- Comp2 Name
>> Mixed Air Node 1, !- Comp2 Inlet Node Name
>> Main Cooling Coil 1 Outlet Node, !- Comp2 Outlet Node Name
>> PASSIVE, !- Comp2 Branch Control Type
>> COIL:Gas:Heating, !- Comp3 Type
>> Main Heating Coil 1, !- Comp3 Name
>> Main Cooling Coil 1 Outlet Node, !- Comp3 Inlet Node Name
>> Main Heating Coil 1 Outlet Node, !- Comp3 Outlet Node Name
>> PASSIVE, !- Comp3 Branch Control Type
>> FAN:SIMPLE:VariableVolume, !- Comp4 Type
>> Supply Fan 1, !- Comp4 Name
>> Main Heating Coil 1 Outlet Node, !- Comp4 Inlet Node Name
>> VAV Sys 1 Outlet Node, !- Comp4 Outlet Node Name
>> ACTIVE; !- Comp4 Branch Control Type
>>
>>
>> JV Dirkes II wrote:
>>
>>> Dear Don,
>>>
>>> Taking another tack, is it correct to think of the DXsystem object
>>> just like any other air loop object, and place it in a Branch like
>>>
> this?
>
>>> Component 1: OUTSIDE AIR SYSTEM,
>>> Component 2: DXsystem:AirLoop
>>> Component 3: FAN:SIMPLE:VARIABLEVOLUME,
>>> Component 4: COIL:WATER:SIMPLEHEATING,
>>>
>>> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
>>> <mailto:EnergyPlus_Support%40yahoogroups.com>, Don Shirey <shirey@>
>>> wrote:
>>>
>>>> There may be other ways to do this, but here is my suggestion:
>>>>
>>>> Use DXSystem:AirLoop for the cooling coil and fan, with a Single
>>>> Duct:VAV:Reheat air distribution unit that uses
>>>>
>>> COIL:Water:SimpleHeating
>>>
>>>> as the reheat component object.
>>>>
>>>> See example file = 5ZoneAutoDXVAV.idf which is similar to what
>>>>
> you are
>
>>>> looking for, but that example file uses gas reheat coils instead
>>>>
> of hot
>
>>>> water reheat coils.
>>>>
>>>> JV Dirkes II wrote:
>>>>
>>>>> Dear Don,
>>>>>
>>>>> Following up on your suggestion, I have uncovered a couple more
>>>>>
>>> questions:
>>>
>>>>> The Unitary System or Furnace system are geared toward single zone
>>>>> applications (they require a controlling zone"), so they are less
>>>>> applicable to my multi-zone requirement.
>>>>> I want to model a Terminal reheat system (ASHRAE 90.1 Baseline
>>>>>
> system
>
>>>>> #5) with a DX coil and hot water coil which maintain a constant
>>>>> discharge air temperature. The DXsystem: object lacks a
>>>>>
> heating coil,
>
>>>>> though, and I'm now trying to figure out how to add that into
>>>>>
> the air
>
>>>>> loop.
>>>>> It occurs to me that I could let E+ autosize a (relatively)
>>>>>
> monster
>
>>>>> reheat coil, but I'd rather get it to emulate the real system. Any
>>>>> guidance for adding that heating coil to the air loop?
>>>>>
>>>>> Thanks!
>>>>>
>>>>> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
>>>>>
>>> <mailto:EnergyPlus_Support%40yahoogroups.com>, Don Shirey
>>>
> <shirey@> wrote:
>
>>>>>> In an air loop, this DX cooling coil must be included as part of
>>>>>>
>>>>>>
>>>>> another
>>>>>
>>>>>
>>>>>> "compound component" that controls how the DX coil operates.
>>>>>>
>>>>>> For example, the DX cooling coil could be part of
>>>>>>
>>> DXSystem:AirLoop
>>>
>>>>>> or UnitarySystem:HeatCool
>>>>>>
>>>>>> JV Dirkes II wrote:
>>>>>>
>>>>>>
>>>>>>> Dear E+ Forum,
>>>>>>>
>>>>>>> I'm getting an error which tells me that my coil is an invalid
>>>>>>> component. I doubt that this is really the cause of the
>>>>>>>
> error. Can
>
>>>>>>> someone give a suggestion regarding the cause? Thanks!
>>>>>>>
>>>>>>> ** Severe ** Invalid Air Loop Component
>>>>>>> Type="COIL:DX:COOLINGBYPASSFACTOREMPIRICAL".
>>>>>>> ** ~~~ ** ..Air Loop Component Name="CLGCOIL_AH1".
>>>>>>> ** ~~~ ** ..Air Primary Loop=AIRLOOP_AH1
>>>>>>> ** ~~~ ** ..Air Primary Loop Branch=BRANCH_AIRLOOP_AH1
>>>>>>> ** Fatal ** Errors found getting Air Primary Loop
>>>>>>>
>>>> [Non-text portions of this message have been removed]
>>>>
>>>>
>>>
>>>
>> --
>> 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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