How to save energy by boosting pipeline pressure before pump shut down
The sleep and boost function runs a pump to boost the pressure or water level prior to shut down. This extends the pump's sleep time and therefore saves energy. It also avoids unnecessary starting and stopping, and helps to flush the pipelines.
Most clean water pumping systems experience changes in demand, but even when demand is low, the pressure in the pipeline still needs to be maintained.
Sleep and boost is suitable for clean water pumping systems, during the night when water consumption falls. Rather than keep pumps running to maintain the pressure, sleep and boost raises the pressure in the pipeline before shutting the pumps down, allowing them to sleep for longer.
How it works
The drive’s sleep and boost function detects pressure drops in the pipes and runs the pump to boost it pressure prior to shut down. Pumping restarts when the pressure falls below the minimum level. This function extends the pump’s sleep time and helps save energy. Also the lifetime of the pump and motor increase when non-productive running time is avoided.
If demand falls below a set level for more than a pre-set time, the function runs the pumps to increase the pressure to above normal before putting them into sleep mode. This boost means the pipeline remains pressurised for longer, allowing the pumps to stay in sleep mode and save energy.
The pressure is continuously monitored and pumping restarts as soon as it the pressure falls below the minimum level.
The function can be set to operate automatically or only during pre-defined time periods by using the drive’s built-in real-time clock.
Key benefits of ABB's sleep and boost function
- Saves energy by extending sleep time and avoiding having pumps run continuously during low demand periods
- Extends the pump’s maintenance interval due to the reduced running time
- Avoids unnecessary starting and stopping
- Helps to flush the pipelines
- Reduces leakage due to a lower pressure set point
How do I get the sleep and boost function?
The sleep and boost function is a feature of the ABB industrial drive modules for water and wastewater applications. The drives’ pump specific features ensure accurate control of water flow throughout the processing cycle – from raw water, through utilisation, to wastewater treatment.
The modules include pre-programmed pump control functions. These functions are easy to select and implement using pre-configured macros for single and multi-pump applications. In addition, an easy-to-use programming utility is provided, enabling users to further customise their drives.
ABB industrial drive modules are the ideal choice for water and wastewater applications. Specially designed to meet the demanding needs of squared torque pump control, these highly advanced drives maximise uptime and minimise energy costs in pumping systems.
The modules are designed for cabinet assembly and are easily mounted side-by-side. Intelligent start-up assistant ensures that drive commissioning is straightforward and the functions needed for most pumping systems can be easily implemented with the pre-programmed macros. Starting up a pumping system and optimising its performance is extremely easy. ABB industrial drive modules include everything needed for reliable and efficient pump control in water and wastewater applications.
Other intelligent pump functions available include:
- Soft pipe filling
- Remote monitoring
- Level control
- Pump cleaning
- Multi-pump control
- Flow calculation
- Pump specific protection
For more information, please click on either of the links below:
FACTFILE: Intelligent pump control software for ABB industrial drives
APPLICATION NOTE: sing variable speed drives in pump applications
BROCH RE: ABB industrial drives ACQ810 drive modules for water and wastewater