LIBRARY

Components.Convection

Models heat transfer by convection where the thermal conductance is a signal input.

This component represents a lumped thermal element that experiences heat convection. The rate of heat transfer, Q_flow, is determined by the product of the convective thermal conductance, Gc, and the temperature difference, ΔT, across the element. The convective thermal conductance Gc is not a fixed parameter but rather a time-varying signal input to the component. The governing equation is:

$$Q_{flow}=G_c\cdot \mathrm{\Delta }T$$

The temperature difference ΔT and the heat flow Q_flow are typically defined in or inherited from the base class ConvectiveElement1D.

This component extends from ThermalComponents.Interfaces.ConvectiveElement1D

Usage

ThermalComponents.Components.Convection()

Connectors

• solid - This connector represents a thermal port with temperature and heat flow as the potential and flow variables, respectively. (HeatPort)

• fluid - This connector represents a thermal port with temperature and heat flow as the potential and flow variables, respectively. (HeatPort)

• Gc - This connector represents a real signal as an input to a component (RealInput)

Variables

Name	Description	Units
ΔT	Temperature difference across the element, defined as solid.T - fluid.T.	K
Q_flow	Heat flow rate from the solid node to the fluid node.	W

Behavior

$$\begin{array}{rl}\mathtt{\Delta }\mathtt{T}\left(t\right)& =-\mathtt{fluid}\mathtt{.}\mathtt{T}\left(t\right)+\mathtt{solid}\mathtt{.}\mathtt{T}\left(t\right)\\ \mathtt{solid}\mathtt{.}\mathtt{Q}\mathtt{\_}\mathtt{flow}\left(t\right)& =\mathtt{Q}\mathtt{\_}\mathtt{flow}\left(t\right)\\ \mathtt{fluid}\mathtt{.}\mathtt{Q}\mathtt{\_}\mathtt{flow}\left(t\right)& =-\mathtt{Q}\mathtt{\_}\mathtt{flow}\left(t\right)\\ \mathtt{Q}\mathtt{\_}\mathtt{flow}\left(t\right)& =\mathtt{\Delta }\mathtt{T}\left(t\right)\mathtt{Gc}\left(t\right)\end{array}$$

Source

"""
Models heat transfer by convection where the thermal conductance is a signal input.

This component represents a lumped thermal element that experiences heat convection.
The rate of heat transfer, `Q_flow`, is determined by the product of the
convective thermal conductance, `Gc`, and the temperature difference, `ΔT`,
across the element. The convective thermal conductance `Gc` is not a fixed
parameter but rather a time-varying signal input to the component.
The governing equation is:

math Q_{flow} = G_c \cdot \Delta T

The temperature difference `ΔT` and the heat flow `Q_flow` are typically
defined in or inherited from the base class `ConvectiveElement1D`.
"""
component Convection
  extends ThermalComponents.Interfaces.ConvectiveElement1D
  "Signal representing the convective thermal conductance"
  Gc = RealInput() {
    "Dyad": {"placement": {"icon": {"x1": 450, "y1": -50, "x2": 550, "y2": 50, "rot": 90}}}
  }
relations
  Q_flow = Gc * ΔT
metadata {
  "Dyad": {
    "labels": [{"label": "$(instance)", "x": 500, "y": 1100, "rot": 0}],
    "icons": {"default": "dyad://ThermalComponents/Convection.svg"}
  }
}
end

Flattened Source

"""
Models heat transfer by convection where the thermal conductance is a signal input.

This component represents a lumped thermal element that experiences heat convection.
The rate of heat transfer, `Q_flow`, is determined by the product of the
convective thermal conductance, `Gc`, and the temperature difference, `ΔT`,
across the element. The convective thermal conductance `Gc` is not a fixed
parameter but rather a time-varying signal input to the component.
The governing equation is:

math Q_{flow} = G_c \cdot \Delta T

The temperature difference `ΔT` and the heat flow `Q_flow` are typically
defined in or inherited from the base class `ConvectiveElement1D`.
"""
component Convection
  "Connector representing the solid side of the heat transfer interface."
  solid = HeatPort() {
    "Dyad": {
      "placement": {"icon": {"iconName": "heat_port_a", "x1": -50, "y1": 450, "x2": 50, "y2": 550}}
    }
  }
  "Connector representing the fluid side of the heat transfer interface."
  fluid = HeatPort() {
    "Dyad": {
      "placement": {
        "icon": {"iconName": "heat_port_b", "x1": 950, "y1": 450, "x2": 1050, "y2": 550}
      }
    }
  }
  "Temperature difference across the element, defined as solid.T - fluid.T."
  variable ΔT::Temperature
  "Heat flow rate from the solid node to the fluid node."
  variable Q_flow::HeatFlowRate
  "Signal representing the convective thermal conductance"
  Gc = RealInput() {
    "Dyad": {"placement": {"icon": {"x1": 450, "y1": -50, "x2": 550, "y2": 50, "rot": 90}}}
  }
relations
  ΔT = solid.T - fluid.T
  solid.Q_flow = Q_flow
  fluid.Q_flow = -Q_flow
  Q_flow = Gc * ΔT
metadata {
  "Dyad": {
    "labels": [{"label": "$(instance)", "x": 500, "y": 1100, "rot": 0}],
    "icons": {"default": "dyad://ThermalComponents/Convection.svg"}
  }
}
end

Test Cases

No test cases defined.

Related

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