Do the closed and open bounds of an infrared-gating textile survive other two-node design choices and steady state?
research/garment-twonodegate
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 it found
Re-runs the two fixed states of a gated textile (infrared transmittance 0.15 closed, 0.8 open) from an earlier model in the switchable two-node comparison, under two sets of design choices and at 3 h and steady state (stylised, preliminary). Opening the gate lowers skin temperature by 0.20–0.25 C in a 31 C room and 1.4–1.5 C in a 16 C room, and moves 5.5–6.2 W/m2 from evaporation to dry loss at 31 C; the choice sets differ by about 0.05 C there. Limits: two fixed states with no switching dynamics, evaporative heat loss rather than sweat mass, no validation against people.
A figure from its own output
Paper, code and results
More in Engineered clothing
- 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).
- When the metabolic rate steps from rest to walking, does a thermostat-driven infrared-gating textile beat its fixed states?A step in metabolic rate (rest to walking) instead of room temperature for the thermostat infrared-gating textile: at 24 C the gate beats both fixed states under one choice set and ties fixed closed under the other, at 28 C staying open is as good as any policy, and a 10 min lag erases the gain after walking stops; stylised, preliminary.
- If a thermostat infrared-gating band is tuned on some rooms, does it still help in rooms it never saw?Tuning the thermostat infrared-gating band on training rooms and testing on held-out rooms: a narrow band just below 33.7 C carries over (about 0.01 to 0.06 C better than the untuned band) but chatters, up to 24 switches in 180 min (stylised).
- Does a tuned infrared-gating thermostat survive an actuation lag and a cost per switch?Retuning the thermostat infrared-gating band with an actuation lag (0 to 10 min) and a cost per switch: lag cuts the gain over never switching from 0.23 to 0.15 C (stylised), a switch penalty widens the band and stops the chatter, and under one choice set the tuned band can lose to the untuned one.
- Does a proportional infrared-gating textile beat the on/off thermostat gate?A proportional infrared-gating transmittance against the tuned on/off thermostat gate: a negative result, within 0.010 C in every cell because the tuned ramp collapses to nearly on/off, and a softer ramp costs 0.02 to 0.07 C (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.