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Lemonergy · Studio block

Electrothermal resistor

Linear temperature coefficient with positive floor; all electrical dissipation enters the thermal port

Implementation ID
electrothermal-resistor
Reviewed
2026-10-27

Behavior

Conserving component solved simultaneously with the connected network. Linear temperature coefficient with positive floor; all electrical dissipation enters the thermal port

Interface

Electrothermal resistor interfaceInputs or arguments on the left, observed outputs on the right. Conserving terminals appear below the component. The tables give units and behavior.Electrothermal resistorStudio blockcurrentvoltageheatFlowpnh
Original Lemonergy interface view. Lines identify ports; they are not a completed simulation circuit.
Ports and observed outputs
NameDirectionUnitMeaning
pterminalV; Aelectrical conserving connection; voltage across and current through the connected branch.
nterminalV; Aelectrical conserving connection; voltage across and current through the connected branch.
hterminalK; Wthermal conserving connection; absolute temperature with balanced heat flow.
currentoutputARecorded current measurement from the conserving simulation.
voltageoutputVRecorded voltage measurement from the conserving simulation.
heatFlowoutputWRecorded heat flow measurement from the conserving simulation.

Parameters

Defaults are initial model values. Select values for your own model and operating conditions.

Configuration fields
ParameterUnitDefaultMeaning and limits
Reference resistance
referenceResistanceOhm		ohm10Electrical resistance at the reference temperature.
Minimum 1e-06; Maximum 1000000000000
Reference temperature
referenceTemperatureK		K300Absolute temperature at which the reference resistance is defined.
Minimum 0; Maximum 5000
Temperature coefficient
alphaPerK		1/K0.004Fractional resistance change for each kelvin relative to the reference temperature.
Minimum -1; Maximum 1
Minimum resistance
minimumResistanceOhm		ohm1e-06Positive floor applied to the calculated or commanded electrical resistance.
Minimum 1e-09; Maximum 1000000000

Equations and rules

  • R = max(Rref[1 + α(T − Tref)], Rmin)
  • Q̇h = V I

Worked example

Electrothermal resistor worked example

Editable first-party network. supply: voltageV=12; hot-boundary: differenceK=350; cold-boundary: differenceK=300. Checks below were verified in the native execution engine.

Open Studio example after release →
Numerical checks for the bundled synthetic example
OutputTime (s)Expected valueUnitAbsolute tolerance
current
target/current		11A9.999999999993736e-07
voltage
target/voltage		112V1.1999999999999997e-05
heatFlow
target/heatFlow		112W1.1999999999140553e-05

Use in a workflow

Electrothermal resistor worked example

Linear temperature coefficient with positive floor; all electrical dissipation enters the thermal port

  1. Electrothermal resistor: Conserving component solved simultaneously with the connected network. Linear temperature coefficient with positive floor; all electrical dissipation enters the thermal port
    • Use the block reference for settings and connections.
    • Implementation tested locally; public release pending.
Open Studio example after release

Connected concepts

Limits and interpretation

  • Linear temperature coefficient with positive floor; all electrical dissipation enters the thermal port
  • Demonstration parameters are not calibrated hardware data. Singular or incompatible ideal constraints and unsupported state ranges stop the run.

Scientific and mathematical references

These sources explain the scientific and mathematical background. The behavior, interface and limits above define the Lemonergy implementation; a citation does not imply every model option in the source is implemented.

  1. University Physics Volume 2, §1.6: Mechanisms of Heat Transfer

    OpenStax, Rice University

    Technical reference · Conduction, convection, radiation and thermal resistance.

  2. Electrical Energy and Power

    OpenStax, Rice University

    Technical reference · Underlying physical law or reduced-model basis; Lemonergy implementation choices and limits are documented separately.

Implementation sources

This reference follows the public interface and locally verified numerical checks for an upcoming release.

Contract: Lemonergy Studio public contract · Verification record: verification-2026-10-27

  • docs/glossary/native-block-verification.json

This implementation and its workflow uses (JSON) · Knowledge graph (JSON-LD)