What are the energy-saving methods for circulating water pumps?
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This post was last edited by Hasty Passerby on 2018-9-10 at 16:41. What are the energy-saving methods for circulating water pumps? Due to differences between design parameters and actual operating conditions, the capacity of circulation pumps in many enterprises is far greater than the actual water demand. During operation, the outlet pressure is adjusted by changing the opening degree of the return valve, but this leads to unnecessary energy consumption and increased production costs. So what methods can be used to solve this problem? Should the impeller be cut or variable frequency control be used? Is there a better way to do it? Please share based on the situation in your own company!
It is necessary to calculate the actual amount of water required. and pressure, then use frequency conversion for adjustment
We used to do impeller cutting; it’s no longer sufficient now, so we need to replace the impeller
1. Use frequency conversion for adjustment. 2. Adjust the motor power.
The commonly used energy-saving methods are frequency conversion and modifying the impeller; of course, new specialized impellers as well as multi-stage centrifugal pumps can also achieve energy savings, though the investment required is slightly higher.
1. It is best to use a frequency converter to adjust the pump pressure and flow rate based on the water consumption； 2. Return pipes are added at the pump inlet and outlet; by adjusting the return valve, the pump pressure and flow rate can be controlled, which also helps to save energy to some extent.
1. One should first understand which devices require high head or low head pressure. For those that need high head pressure (generally, heat exchangers require water in relatively small quantities), high-head pumps should be chosen, which can help save a lot on operating costs. 2. Rotor size modification 3. Inverter installation
Firstly, pumps with different features and specifications are selected based on the specific needs of each user； Only then, when there is indeed an adequate amount of surplus, can the impeller be replaced or a frequency converter be added – this is a very efficient and feasible solution!
For the pump, it is possible to replace the motor, the cutting impeller, or the entire pump； The fan can be equipped with a variable frequency drive.