modelPipeFreeConvection_N
Heating pipe heat exchange by free or hindered convection with air
Information
This model is a variant of the PipeFreeConvection model, in which one single-port is replaced by a multi-port, thus enabling the computation of the heat flow when using discretized pipes models. The total heat flow to the air (i.e. heat flow at the single heat port) is defined as the sum of the heat flow from each cell.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | N_p | 1 | number of pipes in parallel |
| Integer | N | 2 | number of cells for pipe side |
| Modelica.Units.SI.Area | A | floor surface | |
| Modelica.Units.SI.Length | d | characteristic dimension of the pipe (pipe diameter) | |
| Modelica.Units.SI.Length | l | length of heating pipes | |
| Boolean | freePipe | true | true if pipe in free air, false if hindered pipe |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Greenhouses.Interfaces.Heat.HeatPorts_a | heatPorts_a | ||
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b | port_b |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.CoefficientOfHeatTransfer[N] | HEC_ab | ||
| Real[N] | alpha | ||
| Modelica.Units.SI.HeatFlowRate | Q_flow | ||
| Modelica.Units.SI.TemperatureDifference[N] | dT | port_a.T - port_b.T |