The theory behind load shifting is to use more power when it’s cheap and less power when it’s expensive.
Load shifting involves the shifting of energy use (kWh) from one period to another so that the demand profile (kW) has lower peaks than before. The energy is generally shifted from the more expensive peak periods to periods when lower charges apply. The amount of energy by which the peak is reduced is offset by an increase in energy use during other times of the day so that the energy consumption (kWh) for the entire day remains constant. Whilst there is no energy saving, the shifting of energy from one period to another may result in cost savings to a customer paying time differentiated energy charges.
Good candidates for load shifting are processes which exhibit one or more of the following characteristics:
- The process does not run continuously
- The process has internal storage capacity (silos, dams, tanks)
- The process has spare capacity so that it can run fewer hours at a higher activity level but still deliver the same output per day
- Energy charges vary according to the time of the day that it is used (i.e. time of use charges are applicable)
We have completed many load shift projects for mining, utility and municipal clients such as:
- Pump scheduling for mine dewatering applications
- Pump scheduling for utility water pumps
- Municipal hot water load control systems
We can offer a comprehensive load shifting solution involving the following:
- Identifying load shifting opportunities in the plant
- Quantifying the load shifting potential through experiments and/or simulation
- Developing an automated solution that will ensure the saving is realised sustainably
- Implementing the solution on a turnkey basis
- Provide daily performance monitoring and if required, support of the solution to ensure that the savings are sustainable
Please contact us for further information on this solution.