RE: [EnergyPlus_Support] Example of Unitary in series with HW coil

[YuanLu Li <yli006@xxxxxxxxxxx>]

Unitary is not an unique object.

You wanted a HW coil, it does not make sense, in terms of practical  and capacity consideration, if you are working on a small capacity system..   The high light group of templates may meet your requirement.  You will find some matching example files in the exampleFiles folder.  Usually there are two versions, one for template, one for the normal IDF entry.
 
Fan, Dx coil and heating coil is a standard configuration for a small system. . 
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I thought it may be a good idea to show a section of the IO manual here, so the reader in general can find them easier.
 
(10/11/10  pp .1950   HVAC Template Objects Group -- HVAC Templates )
 
Group -- HVAC Templates

This group of objects allows for the specification of simple zone thermostats and HVAC systems with automatically generated node names. The combinations of HVACTemplate objects are shown below.

For a simple ideal loads system to use for sizing and loads oriented simulations:
HVACTemplate:Thermostat
HVACTemplate:Zone:IdealLoadsAirSystem
[   I usually start my project using the above system  or ZoneHVAC:IdealLoadsAirSystem  for IDF debugging.  .]
 
For packaged terminal air conditioner (PTAC) systems with optional hot water boiler:
 
HVACTemplate:Thermostat
HVACTemplate:Zone:PTAC
HVACTemplate:Plant:HotWaterLoop (optional)
HVACTemplate:Plant:Boiler (optional)
 
For packaged terminal air-to-air heat pump (PTHP) systems:
HVACTemplate:Thermostat
HVACTemplate:Zone:PTHP
 
For direct-expansion cooling, packaged and split system simulations:
HVACTemplate:Thermostat
HVACTemplate:Zone:Unitary
HVACTemplate:System:Unitary
 
For direct-expansion heat pump systems:
HVACTemplate:Thermostat
HVACTemplate:Zone:Unitary
HVACTemplate:System:UnitaryHeatPump:AirToAir
 
For packaged variable air volume systems using direct-expansion cooling:
HVACTemplate:Thermostat
HVACTemplate:Zone:VAV or
HVACTemplate:Zone:VAV:FanPowered
HVACTemplate:System:PackagedVAV
HVACTemplate:Plant:HotWaterLoop
HVACTemplate:Plant:Boiler
 
For variable air volume systems with boilers and air-cooled chillers:
HVACTemplate:Thermostat
HVACTemplate:Zone:VAV or
HVACTemplate:Zone:VAV:FanPowered
HVACTemplate:System:VAV
HVACTemplate:Plant:ChilledWaterLoop
HVACTemplate:Plant:HotWaterLoop
HVACTemplate:Plant:Chiller
HVACTemplate:Plant:Boiler
 
For variable air volume systems with boilers and water-cooled chillers, an object related to towers is added:
HVACTemplate:Thermostat
HVACTemplate:Zone:VAV
HVACTemplate:System:VAV or
HVACTemplate:Zone:VAV:FanPowered
HVACTemplate:Plant:ChilledWaterLoop
HVACTemplate:Plant:HotWaterLoop
HVACTemplate:Plant:Chiller
HVACTemplate:Plant:Boiler
HVACTemplate:Plant:Tower
 
For fan coil systems with boilers and chillers:
HVACTemplate:Thermostat
HVACTemplate:Zone:FanCoil
HVACTemplate:Plant:ChilledWaterLoop
HVACTemplate:Plant:HotWaterLoop
HVACTemplate:Plant:Chiller
HVACTemplate:Plant:Boiler
HVACTemplate:Plant:Tower
 
For water to air heat pumps with boilers and cooling tower:
HVACTemplate:Thermostat
HVACTemplate:Zone:WaterToAirHeatPump
HVACTemplate:Plant:MixedWaterLoop
HVACTemplate:Plant:Boiler
HVACTemplate:Plant:Tower
 
The only other HVAC related objects besides the HVACTemplate objects that need to be specified related to HVAC systems are:

• Schedule:Year or Schedule:Compact
• SizingPeriod objects (one for heating and one for cooling) Note: all SizingPeriod objects can be used but for simplicity in the following descriptions, we will only reference SizingPeriod:DesignDay
• SimulationControl
• Sizing:Parameters

This makes the input requirements much smaller but sacrifices some of the flexibility normally found in EnergyPlus
====================================
This may answer some other user asking for information on system using  heat pump and fan coil.  Not all the zone and system objects are in the templates.
 
 

 Dr. Li  

 

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To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Sat, 26 Mar 2011 14:54:39 +0000
Subject: [EnergyPlus_Support] Example of Unitary in series with HW coil

 

Anybody have a working example of a dx coil and fan wrapped in a Unitary object in series with HW coil?

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