modelConstant
Constant efficiency
Extends from TRANSFORM.Fluid.Pipes_Obsolete.ClosureModels.PumpCharacteristics.Models.Efficiency.PartialEfficiencyChar (Base class for pump efficiency characteristics.).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.VolumeFlowRate | V_flow_nominal (from PartialEfficiencyChar) | m_flow_nominal/rho_nominal | Nominal volumetric flow rate |
| SI.Height | head_nominal (from PartialEfficiencyChar) | dp_nominal/(rho_nominal*Modelica.Constants.g_n) | Nominal head |
| Boolean | isPump (from PartialEfficiencyChar) | true | =true then affinity laws for pump else fan |
| SI.MassFlowRate | m_flow_start (from PartialEfficiencyChar) | ||
| SI.Pressure | p_a_start (from PartialEfficiencyChar) | ||
| SI.Pressure | p_b_start (from PartialEfficiencyChar) | ||
| SI.SpecificEnthalpy | h_start (from PartialEfficiencyChar) | ||
| SI.PressureDifference | dp_start (from PartialEfficiencyChar) | p_b_start - p_a_start | |
| SI.Density | rho_start (from PartialEfficiencyChar) | Medium.density_ph(p_b_start, h_start) | |
| SI.VolumeFlowRate | V_flow_start (from PartialEfficiencyChar) | m_flow_start/rho_start | |
| SI.Efficiency | eta_constant | 1.0 | Constant efficiency |
| Internal Interface › Nominal Operating Parameters: | |||
| SI.MassFlowRate | m_flow_nominal (from PartialEfficiencyChar) | Mass flow rate | |
| SI.Density | rho_nominal (from PartialEfficiencyChar) | Density | |
| SI.Conversions.NonSIunits.AngularVelocity_rpm | N_nominal (from PartialEfficiencyChar) | Pump speed | |
| SI.Length | diameter_nominal (from PartialEfficiencyChar) | Impeller Diameter | |
| SI.PressureDifference | dp_nominal (from PartialEfficiencyChar) | Nominal pressure gain | |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState | state (from PartialEfficiencyChar) | Thermodynamic state | |
| SI.MassFlowRate | m_flow (from PartialEfficiencyChar) | Mass flow rate | |
| SI.Conversions.NonSIunits.AngularVelocity_rpm | N (from PartialEfficiencyChar) | Pump speed | |
| SI.Length | diameter (from PartialEfficiencyChar) | Impeller Diameter | |
| SI.Density | rho (from PartialEfficiencyChar) | Medium.density(state) | Density |
| SI.VolumeFlowRate | V_flow (from PartialEfficiencyChar) | m_flow/rho | Volumetric flow rate |
| SI.Efficiency | eta (from PartialEfficiencyChar) | Efficiency |