Q2Electrical Energy Conversion And Auditing

Electrical load management refers to the systematic practice of monitoring, controlling, and strategically scheduling a facility's various electrical loads to achieve a more favorable overall consumption pattern — flattening peak demand periods, shifting non-critical/flexible loads to off-peak hours (when electricity may be cheaper or grid capacity more available), and coordinating the operation of multiple pieces of equipment to avoid unnecessary simultaneous peak loading, all aimed at reducing both total energy cost and the facility's peak power demand, which (as discussed below) is often separately billed and can represent a substantial portion of total electricity cost for industrial/commercial consumers.

Maximum demand control specifically addresses the fact that most industrial and commercial electricity tariffs include a demand charge, based on the facility's highest recorded average power demand over a specified short interval (commonly 15 or 30 minutes) within the billing period, in addition to the energy (kWh) charge for total consumption — since this demand charge is based on the single highest peak demand interval during the entire billing period, even a brief, occasional spike in simultaneous equipment operation can substantially increase the facility's total electricity bill, making maximum demand control a valuable, often high-payback energy cost reduction strategy independent of any change in total energy consumption.

Approaches to maximum demand control include: load shedding/scheduling (temporarily switching off or reducing non-critical loads during periods when demand is approaching the facility's target maximum, then restoring them once demand falls); staggered start-up of major equipment (avoiding simultaneous starting of multiple large motors/loads, which would otherwise create a brief but high demand spike, by sequencing their start-up with small time delays between each); demand-limiting control systems (automated systems continuously monitoring real-time demand and automatically shedding pre-designated lower-priority loads whenever demand approaches a pre-set target maximum, restoring them automatically once demand safely falls); and better production/process scheduling (deliberately scheduling especially energy-intensive operations to occur at different times rather than simultaneously, spreading out the facility's overall demand profile) — together, these load management and maximum demand control techniques can often achieve significant electricity cost savings through demand-charge reduction alone, frequently with a considerably faster payback than many energy-conservation measures aimed purely at reducing total energy consumption.