Episode Details

A thermostat looks like the simplest device ever built: sensor, set point, switch. But the bleeping battle between an IR blaster and an air conditioner is really a lesson in control theory — bang-bang controllers, deadbands, integral windup, and models that forecast accurately yet get the sign of a cooling action wrong. From there the conversation widens to buildings themselves: thermal mass as a reservoir, phase-change materials in concrete roofs and brick, courtyards in Seville, wind towers, static rooftop shading, and a French office building that has run six summers with no air conditioning at all. Along the way: a district-scale MPC study where hitting the energy target made a quarter of the buildings miserable, a frontier model that cut electricity 6.2% by quietly shrinking the ventilation margin, and the Royal Berkshire Hospital, where local air conditioning was installed in direct contradiction to NHS sustainability plans. The through-line is Daniel's question: can ancient building practices teach modern cooling to run efficiently without making the people inside miserable — and what happens to direct emissions when they don't? Episode #970461 — open it directly at myweirdprompts.com/970461