Advanced pump control
- Jonas Cleiren (Unlicensed)
- Dennis De Beuckeleer
Pump control - Demand Controlled Pump Head (DCPH)
The rpm of the pump is modulated by the highest modulation signal of the 2-way modulating valves of the system. The valves are modulated depending on the heating demand of the system. If the pump uses the highest modulation signal of the valves, the pump is modulated on the highest demand. This control strategy results in less pressure on the valves and less pump energy consumption.
More information on pumps can be found in Pumps.
Pump control - Pressure control on external sensor
The rpm of the pump is modulated by the pressure difference at a certain distance. This strategy is mostly used in big systems with a lot of pressure drops, e.g. district heating. The pressure drop is ideally measured on the furthest part of the critical path (path of most resistance). The strategy lowers the pump energy consumption.
More information on pumps can be found in Pumps.
Pump control - Temperature control over low loss header - 2 points
The rpm of the pump is modulated to minimise the overflow from hot water generated from the boiler into the return pipe. A high return temperature can result in lower production efficiency. By modulating the pump to maintain a certain temperature difference before and after the low loss header, the overflow is minimised. In this case, the supply temperature is measured and used. More information on the disadvantages of a low loss header can be found in Header configuration.
Pump control - Temperature control over low loss header - 4 points
This template is similar to the previous template “Pump control - Temperature control over low loss header - 2 points“, except for the use of four temperatures instead of two. In this case both the flow temperatures as the return temperatures are used to modulate the pump rpm.