modelMultipleToMultiple

Multiple inlet ports, multiple outlet ports

Information

This is a model of a many-to-many fluid connector with an optional control volume, and an optional mixing port (common leg). It is typically used to connect parallel pumps with parallel chillers or boilers. Selecting a mixing port allows modeling a headered pumping arrangement. Without any mixing port, a dedicated pumping arrangement is modeled.

Parameters

Type	Name	Default	Description
Integer	icon_xinl	-100	Minimum x-coordinate of inlet connection lines
Integer	icon_xout	100	Maximum x-coordinate of outlet connection lines
Integer	icon_offset	0	Offset in y-direction between inlet and outlet in icon layer
Integer	icon_dy	100	Distance in y-direction between each branch in icon layer
Buildings.Templates.Components.Types.IntegrationPoint	icon_pipe	Buildings.Templates.Components.Types.IntegrationPoint.Supply	Pipe symbol
Configuration
Integer	nPorts_a		Number of inlet ports
Integer	nPorts_b	nPorts_a	Number of outlet ports
Boolean	have_comLeg	false	Set to true for common leg between inlet and outlet ports (headered connection)
Nominal condition
Modelica.Units.SI.MassFlowRate	m_flow_nominal		Nominal mass flow rate
Dynamics › Nominal condition
Modelica.Units.SI.Time	tau	10	Time constant at nominal flow
Dynamics › Conservation equations
Modelica.Fluid.Types.Dynamics	energyDynamics	Modelica.Fluid.Types.Dynamics.DynamicFreeInitial	Type of energy balance: dynamic (3 initialization options) or steady state
Assumptions
Boolean	allowFlowReversal	true	= true to allow flow reversal, false restricts to design direction (ports_a -> ports_b)
Advanced › Diagnostics
Boolean	show_T	false	Set to true if actual temperature at port is computed

Connectors

Type	Name	Description
Modelica.Fluid.Interfaces.FluidPorts_a[nPorts_a]	ports_a	Fluid connector a (positive design flow direction is from ports_a to ports_b)
Modelica.Fluid.Interfaces.FluidPorts_b[nPorts_b]	ports_b	Fluid connectors b (positive design flow direction is from ports_a to ports_b)
Modelica.Fluid.Interfaces.FluidPort_a	port_aComLeg	Common leg port - Case with common leg

Components

Type	Name	Default	Description
PassThroughFluid[nPorts_a]	pasDed		Dedicated fluid pass-through if dedicated arrangement
Medium.ThermodynamicState[nPorts_a]	sta_a	Medium.setState_phX(ports_a.p, noEvent(actualStream(ports_a.h_outflow)), noEvent(actualStream(ports_a.Xi_outflow)))	Medium properties in ports_a
Medium.ThermodynamicState[nPorts_b]	sta_b	Medium.setState_phX(ports_b.p, noEvent(actualStream(ports_b.h_outflow)), noEvent(actualStream(ports_b.Xi_outflow)))	Medium properties in ports_b
Fluid.Delays.DelayFirstOrder	del		Fluid volume to break algebraic loop - Case with common leg
PassThroughFluid	pasSteInl		Fluid pass-through in lieu of control volume - Case with common leg
PassThroughFluid	pasSteOut		Fluid pass-through in lieu of control volume - Case with common leg

Name	Description
Medium	Medium in the component

Revisions

November 18, 2022, by Antoine Gautier:
First implementation.