FixedHeatFlow

Fixed heat flow boundary condition.

This model allows a specified amount of heat flow rate to be "injected" into a thermal system at a given port. The constant amount of heat flow rate Q is given as a parameter. The heat flows into the component to which the component FixedHeatFlow is connected, if parameter Q is positive.

Usage

FixedHeatFlow(Q, T_ref=293.15, alpha=0.0)

Parameters:

Name	Description	Units	Default value
Q	Fixed heat flow rate at port	W
T_ref	Reference temperature	K	293.15
alpha	Temperature coefficient of heat flow rate	1/K	0

Connectors

• node - (Node)

Behavior

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

Source

# Fixed heat flow boundary condition.
#
# This model allows a specified amount of heat flow rate to be "injected" into a thermal system at a given port.
# The constant amount of heat flow rate `Q` is given as a parameter. The heat flows into the component to which
# the component `FixedHeatFlow` is connected, if parameter `Q` is positive.
component FixedHeatFlow
  node = Node() [{
    "Dyad": {
      "placement": {"icon": {"iconName": "node_b", "x1": 900, "y1": 400, "x2": 1100, "y2": 600}}
    }
  }]
  # Fixed heat flow rate at port
  parameter Q::HeatFlowRate
  # Reference temperature
  parameter T_ref::Temperature = 293.15
  # Temperature coefficient of heat flow rate
  parameter alpha::LinearTemperatureCoefficient = 0.0
relations
  node.Q = -Q*(1+alpha*(node.T-T_ref))
end

Flattened Source

# Fixed heat flow boundary condition.
#
# This model allows a specified amount of heat flow rate to be "injected" into a thermal system at a given port.
# The constant amount of heat flow rate `Q` is given as a parameter. The heat flows into the component to which
# the component `FixedHeatFlow` is connected, if parameter `Q` is positive.
component FixedHeatFlow
  node = Node() [{
    "Dyad": {
      "placement": {"icon": {"iconName": "node_b", "x1": 900, "y1": 400, "x2": 1100, "y2": 600}}
    }
  }]
  # Fixed heat flow rate at port
  parameter Q::HeatFlowRate
  # Reference temperature
  parameter T_ref::Temperature = 293.15
  # Temperature coefficient of heat flow rate
  parameter alpha::LinearTemperatureCoefficient = 0.0
relations
  node.Q = -Q*(1+alpha*(node.T-T_ref))
metadata {}
end

Test Cases

This is setup code, that must be run before each test case.

using ThermalComponents
using ModelingToolkit, OrdinaryDiffEqDefault
using Plots
using CSV, DataFrames

snapshotsdir = joinpath(dirname(dirname(pathof(ThermalComponents))), "test", "snapshots")

"/home/actions-runner-10/.julia/packages/ThermalComponents/uOuoD/test/snapshots"

Related

• Examples

• Experiments

• Analyses