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IORef TeX document update. [decent_ci_skip] [skip actions]
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jcyuan2020 committed Feb 18, 2022
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54 changes: 38 additions & 16 deletions doc/input-output-reference/src/overview/group-air-path.tex
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Expand Up @@ -223,19 +223,15 @@ \subsection{AirLoopHVAC:ExhaustSystem}\label{airloophvacexhaustsystem}

The AirLoopHVAC:ExhaustSystem and ZoneHVAC:ExhaustControl objects are used to describe the way that the exhaust air streams are configured. These objects provide a way for the exhaust air streams from multiple zones to be rerouted and recombined to form a new central exhausts. The exhaust system is composed of a central exhaust fan and a zone mixer).

\subsubsection{AirLoopHVAC:ExhaustSystem Input Fields}
\subsubsection{Inputs}

The AirLoopHVAC:ExhaustSystem will take the following input fields:

\paragraph{Field: Name}

The name of the exhaust system.

\paragraph{Field: Availability Schedule}

This is the availability manager list name for the exhaust system.

\paragraph{Field: AirLoopHVAC:ZoneMixer Name}
\paragraph{Field: Zone Mixer Name}

This is the name of the AirLoopHVAC:ZoneMixer object that connects the exhaust air streams from multiple zones. The zone mixer will have the inlet nodes for the exhaust system defined; and typically each inlet node must be the outlet node of a ZoneHVAC:ExhaustControl object.

Expand All @@ -250,16 +246,42 @@ \subsubsection{AirLoopHVAC:ExhaustSystem Input Fields}
An example of the AirLoopHVAC:ExhaustSystem input object is like this:

\begin{lstlisting}

AirLoopHVAC:ExhaustSystem,
Central Exhaust 1, !- Name
Exhaust Avail List, !- Availability Manager List Name
AirLoopExhaustMixer1, !- AirLoopHVAC:ZoneMixer Name
Fan:SystemModel, !- Fan Object Type
CentralExhaustFan1; !- Fan Name

Central Exhaust 1, !- Name
AirLoopExhaustMixer1, !- Zone Mixer Name
Fan:SystemModel, !- Fan Object Type
CentralExhaustFan1; !- Fan Name
\end{lstlisting}

\subsubsection{Outputs}

The following output will be added the to the new exhaust system:

\begin{itemize}

\item Central Exhaust Fan Mass Flow Rate [kg/s];
\item Central Exhaust Fan Volumetric Flow Rate Standard [m3/s];
\item Central Exhaust Fan Volumetric Flow Rate Current [m3/s];
\item Central Exhaust Fan Power [W];
\item Central Exhaust Fan Energy [J];

\end{itemize}

\paragraph{Central Exhaust Fan Mass Flow Rate [kg/s]}
Mass flow rate of the central exhaust fan in [kg/s].

\paragraph{Central Exhaust Fan Volumetric Flow Rate Standard [m3/s]}
Volumetric flow rate of the central exhaust fan in [m3/s] under standard conditions.

\paragraph{Central Exhaust Fan Volumetric Flow Rate Current [m3/s]}
Volumetric flow rate of the central exhaust fan in [m3/s] under current fan outlet conditions.

\paragraph{Central Exhaust Fan Power [W]}
Power consumption of the central exhaust fan in [W].

\paragraph{Central Exhaust Fan Energy [J]}
Energy usage of the central exhaust fan in [J].

\subsection{ZoneHVAC:ExhaustControl}

The input fields for the ZoneHVAC:ExhaustControl object are as follows.
Expand All @@ -274,7 +296,7 @@ \subsubsection{Inputs}

This is the availability schedule name of the ZoneHVAC:ExhaustControl equipment. A schedule value of zero means off, and >0 means on. If the connected AirloopHVAC:ExhaustSystem is on, then this schedule may be used to turn on (or off) the ZoneHVAC:ExhaustControl system. If the connected AirloopHVAC:ExhaustSystem is off, then this ZoneHVAC:ExhaustControl system will be off, and this schedule will be ignored.

\paragraph{Zone Name}
\paragraph{Field: Zone Name}

The name of the zone that the exhaust is located within.

Expand All @@ -292,7 +314,7 @@ \subsubsection{Inputs}

\paragraph{Field: Flow Control Type}

This field is the control type on how the exhaust flows are controlled. The available choices are: Scheduled or FollowSupply. Scheduled means that the target exhaust flow rate will be the Design Flow Rate times the Flow Fraction Schedule. FollowSupply means that the target exhaust flow rate will be the current total flow rate at the node(s) specified in Supply Node or NodeList Name times the Flow Fraction Schedule. For both control types, if the central exhaust fan is not able to meet the total target exhaust flow rate for all of its inlets, then the flow rate will be reduced proportionally to match the available fan flow.
This field is the control type on how the exhaust flows are controlled. The available choices are: \emph{Scheduled} or \emph{FollowSupply}. \emph{Scheduled} means that the target exhaust flow rate will be the Design Flow Rate times the Flow Fraction Schedule. \emph{FollowSupply} means that the target exhaust flow rate will be the current total flow rate at the node(s) specified in Supply Node or NodeList Name times the Flow Fraction Schedule. For both control types, if the central exhaust fan is not able to meet the total target exhaust flow rate for all of its inlets, then the flow rate will be reduced proportionally to match the available fan flow.

\paragraph{Field: Flow Fraction Schedule Name}

Expand Down Expand Up @@ -325,7 +347,7 @@ \subsubsection{Inputs}
Zone2 Exhaust Node, !- Inlet Node Name
Zone2 ExhaustSystem Node, !- Outlet Node Name
0.1, !- Design Flow Rate {m3/s}
Scheduled, !- Flow Control Type (Scheduled, FollowSupply, Other?)
Scheduled, !- Flow Control Type (Scheduled or FollowSupply)
Zone2 Exhaust Flow Sched, !- Flow Fraction Schedule Name
, !- Supply Node or NodeList Name (used with FollowSupply control type)
, !- System Availability Manager Name
Expand Down

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