Figure 1. The chart shows energy savings achieved by Refrigeration Service Co. with use of a variable-speed controller. EDITOR’S NOTE: This material was prepared by Heatcraft Worldwide Refrigeration.

Region 2 — variable rotor speed. Region 2 represents the mode of operation where the prevailing wind is strong enough for the turbine to capture energy, but not at its rated power and rotor speed.

The impact of variable speed limits (VSL) on aggregate traffic flow behaviour on motorways is shown to bear similarities to the impact of ramp metering, in particular, when addressing potentially ...