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Lemonergy · Studio block

Thermal mass

Constant heat capacity with conserved sensible energy

Implementation ID
thermal-mass
Reviewed
2026-10-27

Behavior

Conserving component solved simultaneously with the connected network. Constant heat capacity with conserved sensible energy

Interface

Thermal mass interfaceInputs or arguments on the left, observed outputs on the right. Conserving terminals appear below the component. The tables give units and behavior.Thermal massStudio blocktemperaturestoredEnergyh
Original Lemonergy interface view. Lines identify ports; they are not a completed simulation circuit.
Ports and observed outputs
NameDirectionUnitMeaning
hterminalK; Wthermal conserving connection; absolute temperature with balanced heat flow.
temperatureoutputKRecorded temperature measurement from the conserving simulation.
storedEnergyoutputJRecorded stored energy 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
Mass
massKg		kg1Material mass that contributes sensible and, where enabled, latent heat storage.
Minimum 1e-09; Maximum 1000000000
Specific heat capacity
specificHeatJkgK		J/(kg K)1000Sensible heat required per unit mass and kelvin.
Minimum 1e-06; Maximum 1000000000
Initial temperature
initialTemperatureK		K300Absolute initial temperature of the thermal storage.
Minimum 0; Maximum 5000

Equations and rules

  • m cp dT/dt = Σ Q̇in

Worked example

Thermal mass worked example

Editable first-party network. heater: heatFlowW=100. 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
temperature
mass/temperature		1300.1K0.0003001000000000015
storedEnergy
mass/storedEnergy		1100J0.00010000000000159174

Use in a workflow

Thermal mass worked example

Constant heat capacity with conserved sensible energy

  1. Thermal mass: Conserving component solved simultaneously with the connected network. Constant heat capacity with conserved sensible energy
    • Use the block reference for settings and connections.
    • Implementation tested locally; public release pending.
Open Studio example after release

Connected concepts

Limits and interpretation

  • Constant heat capacity with conserved sensible energy
  • 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. Enthalpy

    NASA Glenn Research Center

    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)