diff --git a/doc/input-output-reference/src/overview/group-fans.tex b/doc/input-output-reference/src/overview/group-fans.tex index a6a30890291..90c3e29c77b 100644 --- a/doc/input-output-reference/src/overview/group-fans.tex +++ b/doc/input-output-reference/src/overview/group-fans.tex @@ -127,6 +127,7 @@ \subsubsection{Inputs}\label{inputs-fansysmodel} A field set is pair of values for the flow fraction and electric power fraction at each speed. The sets should be arranged in increasing order so that the flow fractions become larger in subsequent field sets. Typically the highest speed level will match the design maximum and have fractions of 1.0. This object is extensible, so additional sets of the following two fields can be added to the end of this object. \paragraph{Field: Speed <\#> Flow Fraction}\label{field-speed-flow-fraction-fansysmodel} + This is the flow fraction for the fan speed. This value is multiplied by the Design Maximum Air Flow Rate to obtain the flow rate when operating at this speed. \paragraph{Field: Speed <\#> Electric Power Fraction}\label{field-speed-power-fraction-fansysmodel} @@ -225,13 +226,29 @@ \subsubsection{Outputs}\label{outputs-fansysmodel} \begin{itemize} \item -HVAC,Average,Fan Electricity Rate {[}W{]} + HVAC,Average,Fan Electricity Rate {[}W{]} \item -HVAC,Sum,Fan Electricity Energy {[}J{]} + HVAC,Sum,Fan Electricity Energy {[}J{]} +\item + HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} +\item + HVAC,Average,Fan Air Mass Flow Rate {[}kg/s{]} +\item + HVAC,Average,Fan Heat Gain to Air {[}W{]} +\end{itemize} + +Additional variable for single-speed fans: + +\begin{itemize} \item -HVAC,Average,Fan Rise in Air Temperature{[}deltaC{]} + HVAC,Average,Fan Runtime Fraction {[]} +\end{itemize} + +Additional variable for two-speed and multi-speed fans: + +\begin{itemize} \item -HVAC,Average,Fan Air Mass Flow Rate{[}kg/s{]} + HVAC,Average,Fan Runtime Fraction Speed <\#> {[]} \end{itemize} \paragraph{Fan Electricity Rate {[}W{]}}\label{fan-electric-power-fansysmodel} @@ -246,10 +263,22 @@ \subsubsection{Outputs}\label{outputs-fansysmodel} This output contains the average rise in air temperature across the fan (outlet air temperature minus inlet air temperature) in degrees Celsius for the time interval being reported. -\paragraph{Fan Air Mass Flow Rate{[}kg/s{]}}\label{fan-air-mass-flow-fansysmodel} +\paragraph{Fan Air Mass Flow Rate {[}kg/s{]}}\label{fan-air-mass-flow-fansysmodel} This output contains the average air mass flow rate in kg/s for the time interval being reported. +\paragraph{Fan Heat Gain to Air {[}W{]}}\label{fan-heat-gain-to-air-fansysmodel} + +This output contains the average power in Watts lost to the process air stream for the time interval being reported. + +\paragraph{Fan Runtime Fraction {[]}}\label{fan-runtime-fraction-fansysmodel} + +This output contains the fraction of time that this fan operated for the timestep being reported. Applicable only for single-speed fans. + +\paragraph{Fan Runtime Fraction Speed <\#> {[]}}\label{fan-runtime-fraction-speed-fansysmodel} + +This output contains the fraction of time that this fan operated at each speed for the timestep being reported. The overall runtime fraction is the sum of the runtime fractions for each speed. Applicable only for two-speed and multi-speed fans. + \subsection{Fan:ConstantVolume}\label{fanconstantvolume} This object models a constant air volume fan that is intended to operate continuously based on a time schedule. This fan will not cycle on and off based on cooling/heating load or other control signals (Ref: \hyperref[fanonoff]{Fan:OnOff}). @@ -309,6 +338,10 @@ \subsubsection{Outputs}\label{outputs-013} HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} \item HVAC,Sum,Fan Electricity Energy {[}J{]} +\item + HVAC,Average,Fan Air Mass Flow Rate {[}kg/s{]} +\item + HVAC,Average,Fan Heat Gain to Air {[}W{]} \end{itemize} \paragraph{Fan Electricity Rate {[}W{]}}\label{fan-electric-power-w} @@ -323,6 +356,14 @@ \subsubsection{Outputs}\label{outputs-013} This output field contains the electricity consumption of the fan in Joules for the timestep being reported. This output is also added to a meter with Resource Type = Electricity, End Use Key = Fans, Group Key = System (ref. Output:Meter objects). +\paragraph{Fan Air Mass Flow Rate {[}kg/s{]}}\label{fan-air-mass-flow-kgs} + +This output contains the average air mass flow rate in kg/s for the time interval being reported. + +\paragraph{Fan Heat Gain to Air {[}W{]}}\label{fan-heat-gain-to-air-w} + +This output contains the average power in Watts lost to the process air stream for the time interval being reported. + \subsection{Fan:OnOff}\label{fanonoff} This object models a constant air volume fan that is intended to cycle on and off in tandem with a cooling or heating system (i.e., AUTO fan control mode). The fan can also operate continuously like \hyperref[fanconstantvolume]{Fan:ConstantVolume}. If modeling continuous operation and this object is used as part of a system that utilizes \hyperref[coilheatinggas-000]{Coil:Heating:Fuel}, \hyperref[coilcoolingdxsinglespeed]{Coil:Cooling:DX:SingleSpeed} or \hyperref[coilheatingdxsinglespeed]{Coil:Heating:DX:SingleSpeed}, the user should confirm proper air flow rates (coil and fan max flows are equal) and that the coil part-load fraction correlation(s) are appropriate (e.g., part-load fraction is less than or equal to 1 for all values of coil part-load ratio). If modeling multi-speed fan operation, this object must be used as part of a compound object that allows multiple fan speeds (e.g., \hyperref[airloophvacunitaryfurnaceheatcool]{AirLoopHVAC:Unitary:Furnace:HeatCool}, \hyperref[zonehvacpackagedterminalairconditioner]{ZoneHVAC:PackagedTerminalAirConditioner}, etc.). In this case, the ratio of the compound object air flow rate to the fan's maximum air flow rate is used to determine the power at alternate fan speeds. The optional input for Fan Power Ratio Function of Speed Ratio Curve Name must be entered to model multi-speed fan operation. An optional fan total efficiency ratio curve is also available to model efficiency differences at alternate fan speeds. @@ -397,13 +438,20 @@ \subsubsection{Inputs}\label{inputs-1-017} \subsubsection{Outputs}\label{outputs-1-011} -HVAC,Average,Fan Electricity Rate {[}W{]} - -HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} - -HVAC,Sum,Fan Electricity Energy {[}J{]} - -HVAC,Average,Fan Runtime Fraction {[]} +\begin{itemize} +\item + HVAC,Average,Fan Electricity Rate {[}W{]} +\item + HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} +\item + HVAC,Sum,Fan Electricity Energy {[}J{]} +\item + HVAC,Average,Fan Air Mass Flow Rate {[}kg/s{]} +\item + HVAC,Average,Fan Heat Gain to Air {[}W{]} +\item + HVAC,Average,Fan Runtime Fraction {[]} +\end{itemize} \paragraph{Fan Electricity Rate {[}W{]}}\label{fan-electric-power-w-1} @@ -417,6 +465,14 @@ \subsubsection{Outputs}\label{outputs-1-011} This output field contains the electricity consumption of the fan in Joules for the timestep being reported. This output is also added to a meter with Resource Type = Electricity, End Use Key = Fans, Group Key = System (ref. Output:Meter objects). +\paragraph{Fan Air Mass Flow Rate {[}kg/s{]}}\label{fan-air-mass-flow-kgs-1} + +This output contains the average air mass flow rate in kg/s for the time interval being reported. + +\paragraph{Fan Heat Gain to Air {[}W{]}}\label{fan-heat-gain-to-air-w-1} + +This output contains the average power in Watts lost to the process air stream for the time interval being reported. + \paragraph{Fan Runtime Fraction {[]}}\label{fan-runtime-fraction} This output field contains the fraction of time that this fan operated for the timestep being reported. @@ -542,6 +598,10 @@ \subsubsection{Outputs}\label{outputs-2-009} HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} \item HVAC,Sum,Fan Electricity Energy {[}J{]} +\item + HVAC,Average,Fan Air Mass Flow Rate {[}kg/s{]} +\item + HVAC,Average,Fan Heat Gain to Air {[}W{]} \end{itemize} \paragraph{Fan Electricity Rate {[}W{]}}\label{fan-electric-power-w-2} @@ -556,6 +616,14 @@ \subsubsection{Outputs}\label{outputs-2-009} This output field contains the electricity consumption of the fan in Joules for the timestep being reported. This output is also added to a meter with Resource Type = Electricity, End Use Key = Fans, Group Key = System (ref. Output:Meter objects). +\paragraph{Fan Air Mass Flow Rate {[}kg/s{]}}\label{fan-air-mass-flow-kgs-2} + +This output contains the average air mass flow rate in kg/s for the time interval being reported. + +\paragraph{Fan Heat Gain to Air {[}W{]}}\label{fan-heat-gain-to-air-w-2} + +This output contains the average power in Watts lost to the process air stream for the time interval being reported. + \subsection{Fan:ZoneExhaust}\label{fanzoneexhaust} This fan object differs from the other fans in that it stands on its own in a zone rather than serving as one part of an HVAC air system. This object appears directly in a \hyperref[zonehvacequipmentlist]{ZoneHVAC:EquipmentList} object and all the controls are contained within the fan object. The zone exhaust fan model provides a way to include the electrical power used by the fan. It can also impact air flows in central air handlers by decreasing the flow of return air and sometimes increasing the outdoor air flow rate. @@ -624,9 +692,13 @@ \subsubsection{Outputs}\label{outputs-3-007} \item HVAC,Average,Fan Electricity Rate {[}W{]} \item - HVAC,Average,Fan Rise in Air Temperature{[}deltaC{]} + HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} \item HVAC,Sum,Fan Electricity Energy {[}J{]} +\item + HVAC,Average,Fan Air Mass Flow Rate {[}kg/s{]} +\item + HVAC,Average,Fan Heat Gain to Air {[}W{]} \item HVAC,Average,Fan Unbalanced Air Mass Flow Rate {[}kg/s{]} \item @@ -645,6 +717,14 @@ \subsubsection{Outputs}\label{outputs-3-007} This output field contains the electricity consumption of the fan in Joules for the timestep being reported. This output is also added to an output meter with Resource Type = Electricity, End Use Key = Fans, Group Key = System (ref. Output:Meter objects). +\paragraph{Fan Air Mass Flow Rate {[}kg/s{]}}\label{fan-air-mass-flow-kgs-3} + +This output contains the average air mass flow rate in kg/s for the time interval being reported. + +\paragraph{Fan Heat Gain to Air {[}W{]}}\label{fan-heat-gain-to-air-w-3} + +This output contains the average power in Watts lost to the process air stream for the time interval being reported. + \paragraph{Fan Unbalanced Air Mass Flow Rate {[}kg/s{]}}\label{fan-unbalanced-air-mass-flow-rate-kgs} \paragraph{Fan Balanced Air Mass Flow Rate {[}kg/s{]}}\label{fan-balanced-air-mass-flow-rate-kgs} @@ -1099,6 +1179,10 @@ \subsubsection{Outputs}\label{outputs-4-005} HVAC,Average,Fan Rise in Air Temperature {[}deltaC{]} \item HVAC,Sum,Fan Electricity Energy {[}J{]} +\item + HVAC,Average,Fan Air Mass Flow Rate {[}kg/s{]} +\item + HVAC,Average,Fan Heat Gain to Air {[}W{]} \end{itemize} \paragraph{Fan Electricity Rate {[}W{]}}\label{fan-electric-power-w-4} @@ -1113,6 +1197,14 @@ \subsubsection{Outputs}\label{outputs-4-005} This output field contains the electricity consumption of the fan in Joules for the timestep being reported. This output is also added to a meter with Resource Type = Electricity, End Use Key = Fans, Group Key = System (ref. Output:Meter objects). +\paragraph{Fan Air Mass Flow Rate {[}kg/s{]}}\label{fan-air-mass-flow-kgs-4} + +This output contains the average air mass flow rate in kg/s for the time interval being reported. + +\paragraph{Fan Heat Gain to Air {[}W{]}}\label{fan-heat-gain-to-air-w-4} + +This output contains the average power in Watts lost to the process air stream for the time interval being reported. + \paragraph{Other Outputs}\label{other-outputs} Several parameters input by the user or calculated during component sizing for the design condition (maximum system airflow) are reported separately in the \textless{}filename\textgreater{}.eio file. These parameters include fan airflow and pressure rise; fan shaft input, motor output, VFD output, and VFD input (rated) power; pulley drive ratio; belt output torque; and fan, belt, motor, VFD, and combined system efficiencies. They can be identified by lines in the .eio file beginning with Component Sizing Information, Fan:ComponentModel . The same values are also reported under the ComponentSizingSummary heading in the \textless{}filename\textgreater{}Table.html file.