Real-time, fast demand control is thought to be promising technology to compensate for
highly variable renewable energy sources for the smart grid of the future. Recent HVAC(Heating
Ventilation and Air-Conditioning) facilities for buildings (hereinafter air-conditioning systems) use
sophisticated refrigerant flow control devices and Mitsubishi Heavy Industries, Ltd. (MHI) would
like to propose quick-response (approx. 5 minutes), fast demand control (hereinafter new fast
demand control) to replace existing on-off and coarse slow demand controls.It is, however,
cumbersome due to the great complexity in controlling building HVAC systems. As a solution to
this, we considered the use of a numerical formula model for statistical prediction to calculate the
amount of electricity need five minutes in the future. Operational testing using a numerical formula
model successfully proved the effectiveness of new, fast demand control.
