Volume Flow - MapleSim Help
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Volume Flow

Enforce constant volume flow

 Description The Volume Flow component is a two-port thermal-fluid component that establishes a set volume flow. The temperature and enthalpy of the medium are not changed. When the $\mathrm{use}{V}_{\mathrm{flow}}\mathrm{input}$ boolean parameter is false, the volume flow is set by the component parameter $\mathrm{FlowConst}$, otherwise the flow is set by a signal input. The Medium parameter specifies the name of a Thermal-Fluid Media record, which must be in the model at the same or higer level. The Use default medium boolean parameter, when true, sets the name of the Medium parameter to fluidMedium1, which corresponds to the default name of a fluid medium record. To use a different name, uncheck the box and enter the name in the parameter input that appears.
 Equations $h={c}_{p}T$ ${Q}_{\mathrm{flow}}=0$ ${T}_{q}=T$ ${V}_{\mathrm{flow}}=\left\{\begin{array}{cc}{V}_{{\mathrm{flow}}_{\mathrm{input}}}& \mathrm{use}{V}_{\mathrm{flow}}\mathrm{input}\\ {V}_{{\mathrm{flow}}_{\mathrm{const}}}& \mathrm{otherwise}\end{array}$

Variables

 Name Units Description Modelica ID $\Delta p$ $\mathrm{Pa}$ Pressure drop a->b dp ${Q}_{\mathrm{flow}}$ $W$ Heat exchange with ambient Q_flow $T$ $K$ Outlet temperature of medium T ${T}_{a}$ $K$ Temperature at flowPort_a T_a ${T}_{b}$ $K$ Temperature at flowPort_b T_b $\mathrm{dT}$ $K$ Temperature increase of coolant in flow direction dT ${V}_{\mathrm{flow}}$ $\frac{{m}^{3}}{s}$ Volume flow a->b V_flow

Connections

 Name Description Modelica ID ${\mathrm{flowPort}}_{a}$ flowPort_a ${\mathrm{flowPort}}_{b}$ flowPort_b ${V}_{{\mathrm{flow}}_{\mathrm{input}}}$ Real input; volume flow in $\frac{{m}^{3}}{s}$ volumeFlow

Parameters

 Name Default Units Description Modelica ID $\mathrm{medium}$ fluidMedium medium $m$ $1$ $\mathrm{kg}$ Mass of medium m ${T}_{0}$ $293.15$ $K$ Initial temperature of medium T0 fix T_0 $\mathrm{false}$ True (checked) means ${T}_{0}$ is enforced, otherwise it is a guess T0fixed $\mathrm{use}{V}_{\mathrm{flow}}\mathrm{input}$ $\mathrm{false}$ True (checked) means use an input to set the volume flow useVolumeFlowInput ${V}_{{\mathrm{flow}}_{\mathrm{const}}}$ $1$ $\frac{{m}^{3}}{s}$ Volume flow rate constantVolumeFlow

 Modelica Standard Library The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.