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RE: [EnergyPlus_Support] Fan Coil - Recirculating only





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@xxxxxxxxx
Date: Wed, 27 Jul 2011 09:03:07 +0000
Subject: [EnergyPlus_Support] Fan Coil - Recirculating only

 
I'm having trouble with setting up the 4 pipe FC so that the intake and supply is the zone air node.
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?

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}
,!- Low Speed Supply Air Flow Ratio
,!- Medium Speed Supply Air Flow Ratio
autosize,!- maximum outside air flow rate {m3/s}
,!- Outside Air Schedule Name
!!!!!!!!!!!!!!!!!!!!!!!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
FC PavilionS:PavilionS Fan Coil Return,!- Relief Air Node Name
FC PavilionS:PavilionS OA Mixing Box,!- Outdoor Air Mixer Name
!!!!!!!!!!!!!!!!!!!!!!!HELP HERE END!!!!!!!!!!!!!!!!!!!!!!!!!!!
FC PavilionS:PavilionS Supply Fan,!- Fan Name
FC PavilionS:PavilionS Cooling Coil,- Cooling Coil Name
autosize,!- maximum cold water flow {m3/s}
0,!- minimum cold water flow {m3/s}
0.001,!- Cooling Convergence Tolerance
FC PavilionS:PavilionS Heating Coil,!- Heating Coil Name
autosize, !- maximum hot water flow {m3/s}
0, !- minimum hot water flow {m3/s}
0.001, !- Heating Convergence Tolerance
Coil:Cooling:Water; !- Cooling Coil Object Type




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