LIBRARY

Sources.FixedHeatFlow

Fixed heat flow boundary condition, potentially temperature-dependent.

This component represents a thermal boundary condition where a specific amount of heat flow rate is exchanged with a connected component through its single thermal port (port). The primary heat flow is determined by the parameter Q_flow. If Q_flow is positive, heat is supplied to the external system. An optional linear temperature dependency can be introduced using the parameter alpha (LinearTemperatureCoefficient) and T_ref (ReferenceTemperature). The heat flow Q_{port} at the port is defined by the equation:

$$Q_{port}=-Q_{flow}\cdot (1+\alpha \cdot (T_{port}-T_{ref}))$$

where Q_flow is the specified heat flow rate parameter, \alpha is the temperature coefficient, T_{port} is the temperature at the port (port.T), and T_{ref} is the reference temperature.

Usage

ThermalComponents.Sources.FixedHeatFlow(Q_flow, T_ref=293.15, alpha=0.0)

Parameters:

Name	Description	Units	Default value
Q_flow	Base heat flow rate injected at the port (positive for heat flowing into the connected system)	W
T_ref	Reference temperature for temperature-dependent heat flow	K	293.15
alpha	Linear temperature coefficient for heat flow rate dependency on port temperature	1/K	0

Connectors

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

Behavior

$$\begin{array}{rl}\mathtt{port}\mathtt{.}\mathtt{Q}\mathtt{\_}\mathtt{flow}\left(t\right)& =-\mathtt{Q}\mathtt{\_}\mathtt{flow}(1+(-\mathtt{T}\mathtt{\_}\mathtt{ref}+\mathtt{port}\mathtt{.}\mathtt{T}\left(t\right))\mathtt{alpha})\end{array}$$

Source

"""
Fixed heat flow boundary condition, potentially temperature-dependent.

This component represents a thermal boundary condition where a specific amount of
heat flow rate is exchanged with a connected component through its single thermal port (`port`).
The primary heat flow is determined by the parameter `Q_flow`. If `Q_flow` is positive,
heat is supplied to the external system. An optional linear temperature dependency
can be introduced using the parameter `alpha` (LinearTemperatureCoefficient) and
`T_ref` (ReferenceTemperature).
The heat flow `Q_{port}` at the port is defined by the equation:

math Q_{port} = -Q_{flow} \cdot (1 + \alpha \cdot (T_{port} - T_{ref}))

where `Q_flow` is the specified heat flow rate parameter, `\alpha` is the temperature
coefficient,  `T_{port}` is the temperature at the port (`port.T`), and `T_{ref}`
is the reference temperature.
"""
component FixedHeatFlow
  "Thermal port for connecting to other thermal components"
  port = HeatPort() {
    "Dyad": {
      "placement": {"icon": {"iconName": "port_b", "x1": 950, "y1": 450, "x2": 1050, "y2": 550}}
    }
  }
  "Base heat flow rate injected at the port (positive for heat flowing into the connected system)"
  parameter Q_flow::HeatFlowRate
  "Reference temperature for temperature-dependent heat flow"
  parameter T_ref::Temperature = 293.15
  "Linear temperature coefficient for heat flow rate dependency on port temperature"
  parameter alpha::LinearTemperatureCoefficient = 0.0
relations
  port.Q_flow = -Q_flow * (1 + alpha * (port.T - T_ref))
metadata {
  "Dyad": {
    "labels": [{"label": "$(instance)", "x": 500, "y": 1100, "rot": 0}],
    "icons": {"default": "dyad://ThermalComponents/FixedHeatFlow.svg"}
  }
}
end

Flattened Source

"""
Fixed heat flow boundary condition, potentially temperature-dependent.

This component represents a thermal boundary condition where a specific amount of
heat flow rate is exchanged with a connected component through its single thermal port (`port`).
The primary heat flow is determined by the parameter `Q_flow`. If `Q_flow` is positive,
heat is supplied to the external system. An optional linear temperature dependency
can be introduced using the parameter `alpha` (LinearTemperatureCoefficient) and
`T_ref` (ReferenceTemperature).
The heat flow `Q_{port}` at the port is defined by the equation:

math Q_{port} = -Q_{flow} \cdot (1 + \alpha \cdot (T_{port} - T_{ref}))

where `Q_flow` is the specified heat flow rate parameter, `\alpha` is the temperature
coefficient,  `T_{port}` is the temperature at the port (`port.T`), and `T_{ref}`
is the reference temperature.
"""
component FixedHeatFlow
  "Thermal port for connecting to other thermal components"
  port = HeatPort() {
    "Dyad": {
      "placement": {"icon": {"iconName": "port_b", "x1": 950, "y1": 450, "x2": 1050, "y2": 550}}
    }
  }
  "Base heat flow rate injected at the port (positive for heat flowing into the connected system)"
  parameter Q_flow::HeatFlowRate
  "Reference temperature for temperature-dependent heat flow"
  parameter T_ref::Temperature = 293.15
  "Linear temperature coefficient for heat flow rate dependency on port temperature"
  parameter alpha::LinearTemperatureCoefficient = 0.0
relations
  port.Q_flow = -Q_flow * (1 + alpha * (port.T - T_ref))
metadata {
  "Dyad": {
    "labels": [{"label": "$(instance)", "x": 500, "y": 1100, "rot": 0}],
    "icons": {"default": "dyad://ThermalComponents/FixedHeatFlow.svg"}
  }
}
end

Test Cases

No test cases defined.

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