modelConnection1PipePlugFlow_v
Model for connecting an agent to the DHC system
Extends from Buildings.DHC.Networks.BaseClasses.PartialConnection1Pipe.
Information
This model represents the supply and return lines to connect an agent (e.g. an energy transfer station) to a one-pipe main distribution system. A plug flow pipe model Buildings.Fluid.FixedResistances.PlugFlowPipe that includes pressure drop, heat transfer, and transport delays is used in the main distribution line, but not in the connection to the building, as the latter is typically short.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Length | lDis | Length of the distribution pipe before the connection | |
| Modelica.Units.SI.Velocity | v_nominal | 1.5 | Velocity at m_flow_nominal (used to compute default value for hydraulic diameter dh) |
| Modelica.Units.SI.Height | roughness | 2.5e-5 | Average height of surface asperities (default: smooth steel pipe) |
| Modelica.Units.SI.SpecificHeatCapacity | cPip | 2300 | Specific heat of pipe wall material. 2300 for PE, 500 for steel |
| Modelica.Units.SI.Density | rhoPip | 930 | Density of pipe wall material. 930 for PE, 8000 for steel |
| Modelica.Units.SI.Length | thickness | 0.0035 | Pipe wall thickness |
| Pipe | |||
| Modelica.Units.SI.Length | dIns | Thickness of pipe insulation, used to compute R | |
| Modelica.Units.SI.ThermalConductivity | kIns | Heat conductivity of pipe insulation, used to compute R | |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | heatPortDis | Heat transfer to and from the distribution pipe |
Revisions
-
March 15, 2024, by David Blum:
Renamed. This is for issue 3712. -
December 10, 2023, by Ettore Zanetti:
First implementation.