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 __._,_.___ Primary EnergyPlus support is found at: http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx The primary EnergyPlus web site is found at: http://www.energyplus.gov The group web site is: http://groups.yahoo.com/group/EnergyPlus_Support/ Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files. EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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