modelSingleMixing
Single mixing circuit
Extends from Fluid.HydronicConfigurations.Interfaces.PartialHydronicConfiguration.
Information
Variable primary
This is a typical configuration for constant flow secondary circuits that have a design supply temperature identical to the primary circuit. The control valve should be sized with a pressure drop at least equal to the maximum of Δp1 and 3e3 Pa. Its authority is β = ΔpA-AB / (ΔpA-AB + Δp1).
In most cases the bypass balancing valve is not needed. However, it may be needed to counter negative back pressure created by other served circuits.
Parameterization
By default the secondary pump is parameterized with
m2_flow_nominal and
dp2_nominal + dpBal2_nominal + max({val.dpValve_nominal, val.dp3Valve_nominal}) + dpBal3_nominal
at maximum speed.
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Fluid.HydronicConfigurations.Components.ThreeWayValve | val | Control valve | |
| FixedResistances.Junction | jun | Junction | |
| FixedResistances.PressureDrop | res1 | Primary balancing valve | |
| FixedResistances.PressureDrop | res2 | Secondary balancing valve | |
| Buildings.Fluid.HydronicConfigurations.Components.Pump | pum | Pump | |
| Sensors.TemperatureTwoPort | T2Sup | Consumer circuit supply temperature sensor | |
| Controls.PIDWithOperatingMode | ctl | Controller | |
| Buildings.Controls.OBC.CDL.Integers.GreaterThreshold | isEna | Returns true if enabled | |
| Sensors.TemperatureTwoPort | T2Ret | Consumer circuit return temperature sensor | |
| FixedResistances.PressureDrop | res3 | Bypass balancing valve |