Environmental issues have led to legislation that places new requirements on wastewater handling. Pumping wastewater through the connection network or around the treatment plant accounts already today for a substantial part of the energy bills faced by municipalities and water utilities.
By choosing state-of-the-art wastewater pumps with the highest total efficiency, no compromise on hydraulic free passage and constructional robustness, you are well on the way to bringing down CO2 emissions and reducing operating costs for wastewater pump systems.
Below you will find how Grundfos talks efficiencies on wastewater pumps. Unfortunately there is as yet no minimum efficiency standard for wastewater pumps, unless they are driven by fan-cooling electrical norm-motors. At Grundfos, we have vast experience working with efficiency standards, and we also set our own standards to ensure optimum motor efficiency for our customers. We have prepared the following guide about wastewater pump efficiency, which will help you make the correct pump selection and avoid the most common pitfalls.
Total efficiency
What matters to your energy bill is the total efficiency - meaning the total wire-to-water efficiency. In a wastewater pump there will be electrical, mechanical, and hydraulic losses. A pump manufacturer needs to master all of these without compromising reliability. Grundfos does precisely this and can therefore supply high efficiency products.
- Electrical efficiency
The IEC60034 standard sets minimum efficiency requirements for electrical motors, but is only valid for fan-cooled electrical norm motors. When Grundfos marks a submersible wastewater pump with, for example "IE3" efficiency, we will at all times be able to provide a type-test certificate for the motor components, tested in a norm motor execution according to the IEC60034 standard, which is your assurance of the validity and trustworthiness of what we communicate.
- Mechanical efficiency
Pump efficiency is only interesting if reliability is not compromised. Pump maintenance is costly, whether planned or unplanned, and Grundfos does not compromise on reliability with our products. For constructional robustness with key components, Grundfos for example uses:
-- Tapered roller bearings: Even though tapered roller bearings have higher losses compared to ordinary roller bearings, we have decided to keep these types of bearings to gain longer lifetime in heavy-duty operation.
-- Shaft seal: Grundfos pumps come with double mechanical shaft seals in a cartridge solution. This robust construction consumes additional energy, but ensures longer operational time and less downtime. Replacement is easily done in the field without use of special tools.
- Hydraulic efficiency
Traditionally there has been a trade-off between free passage in hydraulics for reduced clogging, and high efficiency. Grundfos has resolved this traditional compromise and is able to supply wastewater pump systems that offer superior hydraulic efficiency without compromising free passage. Soon we will be revealing how you get superior hydraulic efficiency without compromising free passage.
Grundfos sets efficiency standards
At Grundfos, we have vast experience working with efficiency standards. Grundfos was instrumental in the drafting and passing of the so-called EuP Directive, setting the ecodesign requirements for electric motors for energy-using products (EuPs) in the European Union. As a technological leader of high-efficiency motors, Grundfos was invited to help with the technical aspects of the legislation.
We also set our own standards to ensure optimum motor efficiency for our customers. We ensure that our motor technology answers the real needs of the application in which the pump system or solution is installed - with an emphasis on reliability and efficiency. We call this Grundfos Blueflux(R), and the label guarantees the highest motor efficiency from Grundfos. A pump system or solution with a Grundfos Blueflux(R) motor has a considerably higher total efficiency than comparable solutions and reduces lifecycle costs substantially.
On May 13th 2013, Grundfos will be releasing a new and expanded range of wastewater products that will help you increase your total wire-to-water efficiency, which is central to keeping your CO2 emissions and costs down. Let Grundfos help you find the right pump for your specific application and optimise your business.
For more information:
Frank B. Winther
Communication Manager
Grundfos Corporate Communication
D: +45 87 50 69 23
M: +45 21 99 62 40
E: fwinther@grundfos.com
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Source: Grundfos via Thomson Reuters ONE
Editor: PR Wire
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