How far is the repository's two-node thermal model from an open-source implementation of the Gagge model?

What it found

Runs the two-node model from the thermal-comfort project against pythermalcomfort over 108 conditions (18–36 °C, 30–80% humidity, 1–2 met, 0.3–1 clo). Core temperature agrees within 0.25 °C everywhere; skin temperature differs by 0.58 °C on average and up to 2.1 °C, mostly in cool air; evaporative loss differs by up to 14 W/m² in hot humid air. The direction of change with insulation and humidity agrees in 23 of 24 cases. This compares two implementations, not either against people; causes of the skin-temperature gap are untested and the optical extension is not covered.

A figure from its own output

Paper, code and results

• README and method
• Experiments and results
• Code
• Tests

More in Engineered clothing

• Which design choices explain the gap between the repository's two-node model and an open-source Gagge implementation?Switches nine design choices one at a time between garment-thermal's two-node model and pythermalcomfort's: variable skin mass fraction, convection coefficient and vasodilation gain explain most of the 0.58 °C skin-temperature gap; a comparison of implementations, not of people.
• Do the fabric-optics conclusions of the thermal-comfort model survive a different two-node implementation?Adds garment-thermal's fabric optics (infrared transmittance, emissivity, solar absorptance) to the switchable two-node model and re-runs the comparisons under pythermalcomfort's choices: property rankings agree in all four scenarios, sizes within 3% at 28 °C but up to ~2× apart in cool air and in sun; a comparison of implementations, not of people.
• Do the fabric-optics effects on thermal comfort change once the two-node model reaches steady state?The fabric-optics comparison of garment-twonodeoptics run to steady state instead of one hour: the cool-room disagreement between design choices mostly vanishes (stylised).
• Do the closed and open bounds of an infrared-gating textile survive other two-node design choices and steady state?The closed-to-open bounds of an infrared-gating textile from garment-thermal hold under both two-node choice sets and at steady state: opening the gate cools skin by 0.20–0.25 C at 31 C and keeps it 1.4–1.5 C cooler at 16 C; stylised, preliminary.
• What does a thermostat-driven infrared-gating textile do that its fixed closed and open states do not?A skin-temperature-triggered infrared-gating textile with hysteresis and actuation lag settles to a fixed closed or open state under constant rooms (no chatter, lag only delays the start); gains need changing conditions; stylised, preliminary, mostly null.
• When the room temperature steps, does a thermostat-driven infrared-gating textile beat its fixed states and approach an oracle?Under a single step in room temperature, a thermostat-driven infrared-gating textile beats both fixed states after a step up and tracks an oracle schedule closely (stylised).

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Produced with AI assistance (Claude). Results are from the code in this repository and are simulated or stylised unless the abstract says otherwise; nothing here implies affiliation with or endorsement by any lab, researcher or company cited. MIT licensed.