Pumps consume much electrical energy – the choice and configuration of the correct pumpt is therefore extremely important. If mistakes are made, the hereby incurred extra costs during the plant’s entire life quickly add up to several hundred thousand Euro.
1. Plant design
Pressure loss and the design of the plant nominal widths have a considerable influence on the required pump drive activity. Important is therefore the consequent reduction of the pressure loss and the optimization of all nominal widths already during the planning of a plant. A saving effect of up to 20 % can often be achieved by this simple measure.
2. Speed control
Different drive power can be balanced reliably at various plant conditions by a speed control of the pump. Effects: Service life extension of the pump and low power consumption.
The faster the plant characteristic curve approaches the pump characteristic, the more effective will be the operation of the pump. A careful crosscheck of these data is imperative in order to avoid unnecessary pressure losses and to operate the pumps in an energy and costefficient manner.
4. Impeller adjustment
A further possibility for adjusting the pump capacity to the requirement of the power consumption of the plant is to optimize the impeller of the pump. In many cases, this measure also leads to an improvement of the efficiency of the pump and thus to corresponding savings at the energy consumption.
Further details and many calculation examples beside characteristic curves to this topic can be found in the speech of Gerd Uhrig (Speck-Pumps) on the heatingdays2013 available from us upon request (only available in German).