A Heat-Wave Survival Room: The Integrated Design, Computed Cooling Budget and Cost per Protected Person for One Cooled Room per Dwelling

SIMULATED, NOT MEASURED. A single-room heat-wave refuge is designed as an integrated system for a 4.0 x 4.0 x 2.7 m reference room under a 30-46 C heat-wave day: reflective treatment, insulation of the exposed wall, 40 kg of phase-change buffering and a 2.5 kW split air conditioner. Envelope treatment cuts peak sensible load from 1,819.3 W to 801.5 W and daily sensible cooling energy from 23.159 kWh to 13.305 kWh; daily electricity is 5.337 kWh costing $1.60. The core package costs $2,300, or $4.37 per protected person per heat-wave day for three occupants; a 5.0 kWh battery and 2.0 kWp of photovoltaics ride an 8-hour daytime outage. Failure cases - untreated top-floor rooms, humid nights, and phase-change material that cannot refreeze without powered cooling - are printed in full. All numbers are reproduced by the deposited compute.py.