Energy management represents one of the most valuable functions a BMS can provide. Beyond basic control, modern systems offer sophisticated tools for understanding and reducing energy consumption.
Monitoring and Targeting
Effective energy management starts with measurement. A BMS can collect consumption data from meters throughout a building, correlating energy use with weather, occupancy, and operational patterns. Establishing baselines allows identification of drift and the impact of efficiency measures.
Optimisation Strategies
Several BMS-based strategies deliver measurable savings. Optimum start calculates the latest possible time to achieve setpoint by occupancy, eliminating unnecessary pre-heating. Weather compensation adjusts heating system temperatures based on external conditions. Night setback reduces energy use during unoccupied periods whilst protecting against frost.
Load Management
Peak demand charges can represent a significant portion of electricity costs. BMS-based load shedding sequences non-essential loads to limit maximum demand. This requires careful consideration of which loads can be interrupted without affecting building operation.
Reporting and Verification
Automated energy reports highlight consumption patterns and anomalies. Trend logging provides the data needed for measurement and verification of energy conservation measures. Regular review of this information identifies opportunities and confirms that savings persist over time.
The BMS provides the tools, but effective energy management requires ongoing attention and a commitment to continuous improvement.