Energy consumption is most often the largest component in the calculation of the life cycle cost for a pumping system. In commercial buildings, pumps often run more than 2000 hours a year.
Many factors influence the energy consumption of a pump system:
- Load profile
- Use of speed-controlled solutions
- Pump efficiency (calculation of duty point should be carried out carefully)
- Motor efficiency (the motor efficiency at partial load can vary significantly between high-efficiency motors and normal-efficiency motors)
- Pump sizing (safety margins and rounded numbers tend to result in oversized pumps)
- Other system components, such as pipes and valves
Load profile of circulation systems in commercial building systems.