modelFanCoil4PipeHeatPorts

Model of a sensible only four-pipe fan coil unit computing a required water mass flow rate

Extends from PartialFanCoil4Pipe (Partial model of a sensible only four-pipe fan coil unit computing a required water mass flow rate).

Information

This is a simplified model of a sensible only four-pipe fan coil unit for heating and cooling. It is intended to be coupled to a room model by means of heat ports. See Buildings.DHC.Loads.BaseClasses.PartialFanCoil4Pipe for a description of the modeling principles.

Parameters

Type	Name	Default	Description
hexConfiguration	hexConHea (from PartialFanCoil4Pipe)	hexConfiguration.CounterFlow	Heating heat exchanger configuration
hexConfiguration	hexConCoo (from PartialFanCoil4Pipe)	hexConfiguration.CounterFlow	Cooling heat exchanger configuration
Assumptions
Boolean	allowFlowReversal (from PartialTerminalUnit)	false	Set to true to allow flow reversal in building distribution system
Boolean	allowFlowReversalLoa (from PartialTerminalUnit)	true	Set to true to allow flow reversal on the load side
Scaling
Real	facMul (from PartialTerminalUnit)	1	Multiplier factor
Real	facMulZon (from PartialTerminalUnit)	1	Zone multiplier factor
Configuration
Boolean	have_heaWat (from PartialTerminalUnit)	false	Set to true if the system uses heating water
Boolean	have_chiWat (from PartialTerminalUnit)	false	Set to true if the system uses chilled water
Boolean	have_chaOve (from PartialTerminalUnit)	false	Set to true if the chilled water based heat exchanger operates in change-over
Boolean	have_eleHea (from PartialTerminalUnit)	false	Set to true if the system has electric heating system
Boolean	have_eleCoo (from PartialTerminalUnit)	false	Set to true if the system has electric cooling system
Boolean	have_heaPor (from PartialTerminalUnit)	false	Set to true for heat ports on the load side
Boolean	have_fluPor (from PartialTerminalUnit)	false	Set to true for fluid ports on the load side
Boolean	have_TSen (from PartialTerminalUnit)	false	Set to true for measured temperature as an input
Boolean	have_QReq_flow (from PartialTerminalUnit)	false	Set to true for required heat flow rate as an input
Boolean	have_weaBus (from PartialTerminalUnit)	false	Set to true to use a weather bus
Boolean	have_fan (from PartialTerminalUnit)	false	Set to true if fan power is computed
Boolean	have_pum (from PartialTerminalUnit)	false	Set to true if pump power is computed
Nominal condition
Modelica.Units.SI.HeatFlowRate	QHea_flow_nominal (from PartialTerminalUnit)	0	Nominal heating capacity (>=0)
Modelica.Units.SI.HeatFlowRate	QCoo_flow_nominal (from PartialTerminalUnit)	0	Nominal cooling capacity (<=0)
Modelica.Units.SI.MassFlowRate	mHeaWat_flow_nominal (from PartialTerminalUnit)	0	Heating water mass flow rate at nominal conditions
Modelica.Units.SI.MassFlowRate	mChiWat_flow_nominal (from PartialTerminalUnit)	0	Chilled water mass flow rate at nominal conditions
Modelica.Units.SI.MassFlowRate	mLoaHea_flow_nominal (from PartialTerminalUnit)	0	Load side mass flow rate at nominal conditions in heating mode
Modelica.Units.SI.MassFlowRate	mLoaCoo_flow_nominal (from PartialTerminalUnit)	0	Load side mass flow rate at nominal conditions in cooling mode
Modelica.Units.SI.Temperature	T_aHeaWat_nominal (from PartialTerminalUnit)	273.15 + 60	Heating water inlet temperature at nominal conditions
Modelica.Units.SI.Temperature	T_bHeaWat_nominal (from PartialTerminalUnit)	T_aHeaWat_nominal - 22.2	Heating water outlet temperature at nominal conditions
Modelica.Units.SI.Temperature	T_aChiWat_nominal (from PartialTerminalUnit)	273.15 + 7.2	Chilled water inlet temperature at nominal conditions
Modelica.Units.SI.Temperature	T_bChiWat_nominal (from PartialTerminalUnit)	T_aChiWat_nominal + 5.6	Chilled water outlet temperature at nominal conditions
Modelica.Units.SI.Temperature	T_aLoaHea_nominal (from PartialTerminalUnit)	273.15 + 21.1	Load side inlet temperature at nominal conditions in heating mode
Modelica.Units.SI.Temperature	T_aLoaCoo_nominal (from PartialTerminalUnit)	273.15 + 26.7	Load side inlet temperature at nominal conditions in cooling mode
Modelica.Units.SI.MassFraction	w_aLoaCoo_nominal (from PartialTerminalUnit)	0.011	Load side inlet humidity ratio at nominal conditions in cooling mode

Connectors

Type	Name	Description
Modelica.Blocks.Interfaces.RealInput	TSen (from PartialTerminalUnit)	Temperature (measured)
Modelica.Blocks.Interfaces.RealInput	TSetHea (from PartialTerminalUnit)	Heating set point
Modelica.Blocks.Interfaces.RealInput	TSetCoo (from PartialTerminalUnit)	Cooling set point
Modelica.Blocks.Interfaces.RealInput	QReqHea_flow (from PartialTerminalUnit)	Required heat flow rate to meet heating set point (>=0)
Modelica.Blocks.Interfaces.RealInput	QReqCoo_flow (from PartialTerminalUnit)	Required heat flow rate to meet cooling set point (<=0)
Modelica.Blocks.Interfaces.RealOutput	QActHea_flow (from PartialTerminalUnit)	Heating heat flow rate transferred to the load (>=0)
Modelica.Blocks.Interfaces.RealOutput	QActCoo_flow (from PartialTerminalUnit)	Cooling heat flow rate transferred to the load (<=0)
Modelica.Blocks.Interfaces.RealOutput	PHea (from PartialTerminalUnit)	Power drawn by heating system
Modelica.Blocks.Interfaces.RealOutput	PCoo (from PartialTerminalUnit)	Power drawn by cooling system
Modelica.Blocks.Interfaces.RealOutput	PFan (from PartialTerminalUnit)	Power drawn by fans motors
Modelica.Blocks.Interfaces.RealOutput	PPum (from PartialTerminalUnit)	Power drawn by pumps motors
Modelica.Blocks.Interfaces.RealOutput	mReqHeaWat_flow (from PartialTerminalUnit)	Required heating water flow rate to meet heating set point
Modelica.Blocks.Interfaces.RealOutput	mReqChiWat_flow (from PartialTerminalUnit)	Required chilled water flow rate to meet cooling set point
Modelica.Fluid.Interfaces.FluidPort_a	port_aLoa (from PartialTerminalUnit)	Fluid stream inlet port on the load side
Modelica.Fluid.Interfaces.FluidPort_b	port_bLoa (from PartialTerminalUnit)	Fluid stream outlet port on the load side
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b	heaPorCon (from PartialTerminalUnit)	Heat port transferring convective heat to the load
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b	heaPorRad (from PartialTerminalUnit)	Heat port transferring radiative heat to the load
BoundaryConditions.WeatherData.Bus	weaBus (from PartialTerminalUnit)	Weather data bus
Modelica.Fluid.Interfaces.FluidPort_a	port_aHeaWat (from PartialTerminalUnit)	Heating water inlet port
Modelica.Fluid.Interfaces.FluidPort_a	port_aChiWat (from PartialTerminalUnit)	Chilled water inlet port
Modelica.Fluid.Interfaces.FluidPort_b	port_bHeaWat (from PartialTerminalUnit)	Heating water outlet port
Modelica.Fluid.Interfaces.FluidPort_b	port_bChiWat (from PartialTerminalUnit)	Chilled water outlet port

Components

Type	Name	Description
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulQReqHea_flow (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulQReqCoo_flow (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulQActHea_flow (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulQActCoo_flow (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulPHea (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulPCoo (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulPFan (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulPPum (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulMasFloReqHeaWat (from PartialTerminalUnit)	Scaling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	mulMasFloReqChiWat (from PartialTerminalUnit)	Scaling
Fluid.BaseClasses.MassFlowRateMultiplier	mulHeaWatFloInl (from PartialTerminalUnit)	Mass flow rate multiplier
Fluid.BaseClasses.MassFlowRateMultiplier	mulHeaWatFloOut (from PartialTerminalUnit)	Mass flow rate multiplier
Fluid.BaseClasses.MassFlowRateMultiplier	mulChiWatFloInl (from PartialTerminalUnit)	Mass flow rate multiplier
Fluid.BaseClasses.MassFlowRateMultiplier	mulChiWatFloOut (from PartialTerminalUnit)	Mass flow rate multiplier
Fluid.BaseClasses.MassFlowRateMultiplier	mulLoaMasFloOut (from PartialTerminalUnit)	Load side mass flow rate multiplier
Fluid.BaseClasses.MassFlowRateMultiplier	mulLoaMasFloInl (from PartialTerminalUnit)	Load side mass flow rate multiplier
Fluid.HeatExchangers.RadiantSlabs.BaseClasses.HeatFlowRateMultiplier	mulHeaFloCon (from PartialTerminalUnit)	Convective heat flow rate multiplier
Fluid.HeatExchangers.RadiantSlabs.BaseClasses.HeatFlowRateMultiplier	mulHeaFloRad (from PartialTerminalUnit)	Radiative heat flow rate multiplier
Buildings.Controls.OBC.CDL.Reals.PID	conHea (from PartialFanCoil4Pipe)	PI controller for heating
Buildings.Fluid.Movers.FlowControlled_m_flow	fan (from PartialFanCoil4Pipe)
Buildings.Fluid.HeatExchangers.DryCoilEffectivenessNTU	hexHea (from PartialFanCoil4Pipe)
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	gaiHeaFloNom (from PartialFanCoil4Pipe)
Modelica.Blocks.Sources.RealExpression	Q_flowHea (from PartialFanCoil4Pipe)
Fluid.HeatExchangers.WetCoilEffectivenessNTU	hexWetNtu (from PartialFanCoil4Pipe)
Modelica.Blocks.Sources.RealExpression	Q_flowCoo (from PartialFanCoil4Pipe)
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	gaiFloNom2 (from PartialFanCoil4Pipe)
Buildings.Controls.OBC.CDL.Reals.PID	conCoo (from PartialFanCoil4Pipe)	PI controller for cooling
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter	gaiCooFloNom (from PartialFanCoil4Pipe)	Scaling
Utilities.Math.SmoothMax	smoothMax (from PartialFanCoil4Pipe)	C1 maximum
Buildings.HeatTransfer.Sources.PrescribedHeatFlow	heaFloHeaCon	Convective heat flow rate to load
Buildings.HeatTransfer.Sources.PrescribedHeatFlow	heaFloCooCon	Convective heat flow rate to load
Fluid.Sources.Boundary_pT	retAir	Source for return air
Fluid.Sources.Boundary_pT	sinAir	Sink for supply air
HeatTransfer.Sources.PrescribedHeatFlow	heaFloHeaRad	Radiative heat flow rate to load
HeatTransfer.Sources.PrescribedHeatFlow	heaFloCooRad	Radiative heat flow rate to load
Buildings.Controls.OBC.CDL.Reals.Sources.Constant	zero	Zero
Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensor	senT	Load temperature (measured)

Revisions

February 21, 2020, by Antoine Gautier:
First implementation.