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Rising Pump Energy Efficiency Requirements Make High-Efficiency Energy-Saving Pumps the Market Mainstream

In the past, when buying a pump, many people only compared the purchase price and whether it could achieve the required flow rate and head. In recent years, one obvious change is that more and more pump users are starting to calculate the long-term electricity bill. Pumps often run for years or even more than a decade at a time. In long-running scenarios such as building water supply, industrial circulation and air-conditioning cooling, electricity is the biggest part of the total cost. As industries continue to raise their requirements for equipment energy efficiency, old pumps that are inefficient and run in low-efficiency zones year after year are becoming increasingly unacceptable, and high-efficiency energy-saving pumps are becoming the mainstream choice for new construction and retrofit projects.

burks centrifugal pump

1. Energy efficiency is valued first because operating costs are there for all to see

Take the centrifugal pump, which is used in large quantities. It often runs more than ten hours a day in water supply and circulation systems, so a difference of a few percentage points in efficiency can add up to a considerable difference in electricity costs over a year. In recent years, more and more new projects have included efficiency indicators, motor energy efficiency and full life-cycle cost in their evaluation during the bidding and model selection stages, rather than looking only at the initial purchase price. Part of the demand for energy-saving retrofits of old pump rooms also comes from this calculation: replacing with high-efficiency pumps and carrying out variable frequency retrofits often starts with the few pieces of equipment with the highest energy consumption.

2. High efficiency depends not only on the pump itself but also on whether the model selection is right

It is worth noting that if a high-efficiency pump is selected in a way that deviates from the actual operating conditions and runs for a long time in a region away from the design point, its actual efficiency will likewise be greatly reduced. If the flow rate and head are left too large and throttled hard with valves, the excess energy is simply wasted in the piping. That is why the industry increasingly emphasizes selecting models according to real operating conditions: first understand the flow rate and head curve required by the system, then choose a model whose operating point falls in the high-efficiency zone. Getting this selection step right is more important than simply pursuing the highest efficiency figure in the catalogue.

3. Variable frequency speed control extends energy savings from the equipment to the system

Another trend is the spread of variable frequency technology. Water consumption and cooling demand fluctuate greatly within a day, and fixed-speed pumps can only run at full load, with excess pressure consumed by valves; variable frequency speed control, by contrast, can reduce speed according to actual demand, and as speed comes down, power consumption drops noticeably. In systems with large demand fluctuations, such as constant-pressure water supply and central air-conditioning circulation, variable frequency water supply equipment and variable frequency control solutions have become common configuration directions, with energy savings reflected in the way the whole system operates, not just in the efficiency of a single pump.

4. What this means for buyers: look at the catalogue, but even more at the operating conditions and service

Higher energy efficiency requirements place higher demands on buyers when selecting models: do not look only at the model and price, but ask clearly what the efficiency of this pump is at your own operating point, how the motor is configured, and whether the service provider can help calculate the selection accurately. When retrofitting old equipment, it is also advisable to first carry out a simple operating assessment — the actual operating point of the existing pump, the electricity cost level, and the expected benefits after the retrofit — before deciding whether to replace the whole unit or only carry out control retrofits. If you are selecting models for a new project or assessing the early stages of an energy-saving retrofit of an old pump room, you can contact us through the contact details on the website pages or via online customer service, and send us the operating flow rate, head and current power consumption situation, and we will first help you sort out your selection approach.

As for specific product types, multistage boosting and high-flow circulation are two common categories of demand. You can first take a look at burks' centrifugal pump product page, and then compare the parameter ranges with your own operating conditions.