Buildings.Fluid.Movers.Data

Package containing data for real pumps/fans

Information

This package contains data for fans and pumps.

See the User's Guide for more information.

Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).

Package Content

Name	Description
Generic	Generic data record for movers
Pumps	Package containing data for pumps

Buildings.Fluid.Movers.Data.Generic

Generic data record for movers

Information

Record containing parameters for pumps or fans.

Typical use

This record may be used to assign for example fan performance data using declaration such as

  Buildings.Fluid.Movers.SpeedControlled_y fan(
    redeclare package Medium = Medium,
      per(pressure(V_flow={0,m_flow_nominal,2*m_flow_nominal}/1.2,
                   dp={2*dp_nominal,dp_nominal,0}))) "Fan";

This data record can be used with Buildings.Fluid.Movers.SpeedControlled_Nrpm, Buildings.Fluid.Movers.SpeedControlled_y, Buildings.Fluid.Movers.FlowControlled_dp, Buildings.Fluid.Movers.FlowControlled_m_flow.

An example that uses manufacturer data can be found in Buildings.Fluid.Movers.Validation.Pump_Nrpm_stratos.

Parameters in RPM

The parameters speed_rpm_nominal, constantSpeed_rpm and speeds_rpm are used to assign the non-dimensional speeds

  parameter Real constantSpeed(final min=0, final unit="1") = constantSpeed_rpm/speed_rpm_nominal;
  parameter Real[:] speeds(each final min = 0, each final unit="1") = speeds_rpm/speed_rpm_nominal;

In addition, speed_rpm_nominal is used in Buildings.Fluid.Movers.SpeedControlled_Nrpm to normalize the control input signal. Otherwise, these speed parameters in RPM are not used in the models.

Extends from Modelica.Icons.Record (Icon for records).

Parameters

Type	Name	Default	Description
Pressure curve
flowParameters	pressure		Volume flow rate vs. total pressure rise
Power computation
Boolean	use_powerCharacteristic	false	Use power data instead of motor efficiency
efficiencyParameters	hydraulicEfficiency		Hydraulic efficiency (used if use_powerCharacteristic=false)
efficiencyParameters	motorEfficiency		Electric motor efficiency (used if use_powerCharacteristic=false)
powerParameters	power		Volume flow rate vs. electrical power consumption (used if use_powerCharacteristic=true)
Motor heat rejection
Boolean	motorCooledByFluid	true	If true, then motor heat is added to fluid stream
Normalized speeds (used in model, default values assigned from speeds in rpm)
Real	speed_nominal	1	Nominal rotational speed for flow characteristic [1]
Real	constantSpeed	constantSpeed_rpm/speed_rpm_...	Normalized speed set point, used if inputType = Buildings.Fluid.Types.InputType.Constant [1]
Real	speeds[:]	speeds_rpm/speed_rpm_nominal	Vector of normalized speed set points, used if inputType = Buildings.Fluid.Types.InputType.Stages [1]
Speeds in RPM
AngularVelocity_rpm	speed_rpm_nominal	1500	Nominal rotational speed for flow characteristic [rev/min]
AngularVelocity_rpm	constantSpeed_rpm	speed_rpm_nominal	Speed set point, used if inputType = Buildings.Fluid.Types.InputType.Constant [rev/min]
AngularVelocity_rpm	speeds_rpm[:]	{speed_rpm_nominal}	Vector of speed set points, used if inputType = Buildings.Fluid.Types.InputType.Stages [rev/min]

Modelica definition

record Generic "Generic data record for movers" extends Modelica.Icons.Record; // Pressure requires default values to avoid in Dymola the message // Failed to expand the variable pressure.V_flow. parameter Buildings.Fluid.Movers.BaseClasses.Characteristics.flowParameters pressure( V_flow = {0, 0}, dp = {0, 0}) "Volume flow rate vs. total pressure rise"; parameter Boolean use_powerCharacteristic=false "Use power data instead of motor efficiency"; parameter Buildings.Fluid.Movers.BaseClasses.Characteristics.efficiencyParameters hydraulicEfficiency( V_flow={0}, eta={0.7}) "Hydraulic efficiency (used if use_powerCharacteristic=false)"; parameter Buildings.Fluid.Movers.BaseClasses.Characteristics.efficiencyParameters motorEfficiency( V_flow={0}, eta={0.7}) "Electric motor efficiency (used if use_powerCharacteristic=false)"; // Power requires default values to avoid in Dymola the message // Failed to expand the variable Power.V_flow parameter BaseClasses.Characteristics.powerParameters power( V_flow={0}, P={0}) "Volume flow rate vs. electrical power consumption (used if use_powerCharacteristic=true)"; parameter Boolean motorCooledByFluid=true "If true, then motor heat is added to fluid stream"; parameter Real speed_nominal( final min=0, final unit="1") = 1 "Nominal rotational speed for flow characteristic"; parameter Real constantSpeed(final min=0, final unit="1") = constantSpeed_rpm/speed_rpm_nominal "Normalized speed set point, used if inputType = Buildings.Fluid.Types.InputType.Constant"; parameter Real[:] speeds(each final min = 0, each final unit="1") = speeds_rpm/speed_rpm_nominal "Vector of normalized speed set points, used if inputType = Buildings.Fluid.Types.InputType.Stages"; parameter Modelica.SIunits.Conversions.NonSIunits.AngularVelocity_rpm speed_rpm_nominal=1500 "Nominal rotational speed for flow characteristic"; parameter Modelica.SIunits.Conversions.NonSIunits.AngularVelocity_rpm constantSpeed_rpm=speed_rpm_nominal "Speed set point, used if inputType = Buildings.Fluid.Types.InputType.Constant"; parameter Modelica.SIunits.Conversions.NonSIunits.AngularVelocity_rpm[:] speeds_rpm = {speed_rpm_nominal} "Vector of speed set points, used if inputType = Buildings.Fluid.Types.InputType.Stages"; // Set a parameter in order for // (a) FlowControlled_m_flow and FlowControlled_dp being able to set a reasonable // default pressure curve if it is not specified here, and // (b) SpeedControlled_y and SpeedControlled_Nrpm being able to issue an assert // if no pressure curve is specified. final parameter Boolean havePressureCurve= sum(pressure.V_flow) > Modelica.Constants.eps and sum(pressure.dp) > Modelica.Constants.eps "= true, if default record values are being used"; end Generic;