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[EnergyPlus_Support] Re: Fan Coil - Recirculating only



thank you, Dr. Li. It seems the easiest way is to couple the FC up as if it has its ODA and Relief Ducts piped directly onto it with the Mixing Box and then use the settings to set ODA to zero.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
>
> 
> My comments may not directly solve your problem, but it is my observation on using the EPlus.=================A few years back, (2007) the OA mixer box was not automatically included in the zone equipment.  Many user had difficulty using the manager and controller when using OA mixer box. Then the OA mixer becomes part of the air loop.  It was very simple to use. When the VAV was introduced, the air loop becaome so complex, very few user can find the collect template to use. The infiltration and ventilation object were introduced.  Many user  uses these and do not want the OA mixer.  The reason is that the OA mixer do not provide 100% fresh air. In your case, it is simply to reduce the OA inlet volume to zero, or the minimum OA amount per person, so that the infiltration object is not required to feed the minimum fresh air to a zone.
> =======================There are older non-template examples which do not have OA mixer included in the zone  four pipe fan coil object.  Then DOAS or infiltration is needed to add fresh air into the zone.Fig.93  of the I/O manual for DOAS may have the node names mixed up. May that is causing you problems.=======================By the way, many user liked to use long file names.  This is also a energy wasting practice, for file storage, execution time, reading, plotting, etc.   Because the error message is limited in length per item, it will also make debugging more difficult.
>  Dr. Li   
>  To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: jeannieboef@...
> Date: Wed, 27 Jul 2011 09:03:07 +0000
> Subject: [EnergyPlus_Support] Fan Coil - Recirculating only
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>       I'm having trouble with setting up the 4 pipe FC so that the intake and supply is the zone air node.
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> Q1) Do I need the mixing box? I think so.
> 
> Q2) How do I set up the relief node?
> 
> Q3) The ODA node is the zone air node, correct?
> 
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> 
> ZoneHVAC:FourPipeFanCoil,
> 
>   FC PavilionS:PavilionS Fan Coil,!- Name
> 
>   HVACTemplate-Always 1, !- Availability Schedule Name
> 
>   ConstantFanVariableFlow,!- Capacity Control Method
> 
>   autosize,!- maximum air flow rate {m3/s}
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>   ,!- Low Speed Supply Air Flow Ratio
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>   ,!- Medium Speed Supply Air Flow Ratio
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>   autosize,!- maximum outside air flow rate {m3/s}
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>   ,!- Outside Air Schedule Name
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> !!!!!!!!!!!!!!!!!!!!!!!HELP HERE START!!!!!!!!!!!!!!!!!!!!!!!!!!!
> 
>   FC PavilionS:PavilionS Fan Coil Return,!- Air Inlet Node Name
> 
>   FC PavilionS:PavilionS Supply Inlet,!- Air Outlet Node Name
> 
>   PavilionS:PavilionS Zone Air Node,!- Outdoor Air Node Name
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>   FC PavilionS:PavilionS Fan Coil Return,!- Relief Air Node Name
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>   FC PavilionS:PavilionS OA Mixing Box,!- Outdoor Air Mixer Name
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> !!!!!!!!!!!!!!!!!!!!!!!HELP HERE END!!!!!!!!!!!!!!!!!!!!!!!!!!!
> 
>   FC PavilionS:PavilionS Supply Fan,!- Fan Name
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>   FC PavilionS:PavilionS Cooling Coil,- Cooling Coil Name
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>   autosize,!- maximum cold water flow {m3/s}
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>   0,!- minimum cold water flow {m3/s}
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>   0.001,!- Cooling Convergence Tolerance
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>   FC PavilionS:PavilionS Heating Coil,!- Heating Coil Name
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>   autosize, !- maximum hot water flow {m3/s}
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>   0, !- minimum hot water flow {m3/s}
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>   0.001, !- Heating Convergence Tolerance
> 
>   Coil:Cooling:Water; !- Cooling Coil Object Type
>




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