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chilled water

Appears in Engineering.

Aug 26, 2026

Physics and Control of an HVAC PID Simulator

An intuitive engineering explanation of the thermal physics, chilled-water behavior, PID control, and energy metering used in an interactive Fan Coil Unit and Air Handling Unit simulator.

22 min readhvac building automation pid control

HVAC control loop showing air temperature, chilled-water valve, PID controller, and real-time trend charts