Today, everywhere we turn around, there is serious concern for the environment. From large-scale industries to governments, everyone is working on ways to preserve and protect the environment. One of the best ways to protect our environment is to cut down energy consumption. Reducing the energy we use, reduces our dependence on natural resources, helping us protect and conserve the earth’s fuel. Besides the ecological impacts, energy efficiency also helps in cutting down operational costs. A study by the US Department of Energy reveals that 16% of the electricity costs in an industry are due to its pumping systems. By making your industrial pumps energy efficient, you can significantly reduce the overall costs of operation. In this guide, we cover the top 7 ways to make your centrifugal pumps energy efficient and to reduce operational costs.
#1: Trim Pump ImpellersAre you using an oversized pump? Then, an easy and cost-effective way to reduce the pressure and flow is to size down the impellers. Impeller trimming is an excellent way to make your pumps energy efficient. It works better than using a throttling valve to achieve the same output. However, note that while impeller trimming can help in increasing energy efficiency, there are other better choices. This brings us to the next point.
#2: Use VFDs (Variable Frequency Drives)VFDs alter the rotational speed of the motor depending on the application’s requirements. When you use a VFD, the head and flow are produced as per demand, instead of what the pump can produce. VFDs reduce energy consumption in two scenarios:
- By slowing down the motor of an oversized pump
- By altering the speed of the motor as demanded by the application
#3: Go for Parallel Pumping SystemsUsing multiple pumps in a system is another way to improve energy efficiency and reduce energy consumption. If a pump continuously operates away from its BEP (Best Efficiency Point) then it’s likely to consume higher energy than intended. By installing a second pump that operates in parallel to the primary pump, the load on the primary pump can be reduced thereby increasing the energy efficiency of the overall system.
#4: Eliminate Pressure Loss in the PipeworkOptimizing the pressure in the pipes helps to reduce losses due to friction. Frictional losses are another major reason for energy loss. Several factors like pipe length, pipe diameter, layout, and components affect friction in the pipes. Here are a few points to consider during the design stages:
- Reduce the number of bends in the system
- Try to keep the pipelines as straight as possible
- Maintain uniform diameters for all pipes
- Pipes with smaller diameters are prone to more losses due to friction
- Similarly, the material of the pipe also determines the friction produced in the system
- Corrosion and rust in the pipes also increase friction