Lemonergy · Studio block

Insulated branch with initial temperature target

Zero heat transfer; initializes directly attached unspecified thermal storage temperatures and verifies the consistent initial difference

Implementation ID: initial-temperature-constraint
Reviewed: 2026-10-27

Behavior

Conserving component solved simultaneously with the connected network. Zero heat transfer; initializes directly attached unspecified thermal storage temperatures and verifies the consistent initial difference

Interface

Original Lemonergy interface view. Lines identify ports; they are not a completed simulation circuit.

Ports and observed outputs
Name	Direction	Unit	Meaning
`a`	terminal	K; W	thermal conserving connection; absolute temperature with balanced heat flow.
`b`	terminal	K; W	thermal conserving connection; absolute temperature with balanced heat flow.
`heatFlow`	output	W	Recorded heat flow measurement from the conserving simulation.
`temperature`	output	K	Recorded temperature measurement from the conserving simulation.
`temperatureDifference`	output	K	Recorded temperatureDifference measurement from the conserving simulation.

Parameters

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

Configuration fields
Parameter	Unit	Default	Meaning and limits
Initial temperature difference `initialDifferenceK`	K difference	0	Requested initial temperature at a minus temperature at b. Minimum -5000; Maximum 5000

Equations and rules

Q̇ = 0
Ta(0) − Tb(0) = requested initial difference, subject to consistent storage initialization

Worked example

Insulated branch with initial temperature target worked example

Editable first-party network. constraint: initialDifferenceK=20. Checks below were verified in the native execution engine.

Open Studio example after release →

Numerical checks for the bundled synthetic example
Output	Time (s)	Expected value	Unit	Absolute tolerance
heatFlow `constraint/heatFlow`	1	`0`	W	1e-10
temperature `constraint/temperature`	1	`320`	K	0.00031999999999999997
temperatureDifference `constraint/temperatureDifference`	1	`20`	K	1.9999999999999998e-05

Use in a workflow

Insulated branch with initial temperature target worked example

Zero heat transfer; initializes directly attached unspecified thermal storage temperatures and verifies the consistent initial difference

Insulated branch with initial temperature target: Conserving component solved simultaneously with the connected network. Zero heat transfer; initializes directly attached unspecified thermal storage temperatures and verifies the consistent initial difference
- Use the block reference for settings and connections.
- Implementation tested locally; public release pending.

Open Studio example after release

Connected concepts

Limits and interpretation

Zero heat transfer; initializes directly attached unspecified thermal storage temperatures and verifies the consistent initial difference
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.

University Physics Volume 2, §1.6: Mechanisms of Heat Transfer
OpenStax, Rice University
Technical reference · Conduction, convection, radiation and thermal resistance.
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)