In this module, we’ll discover how E-pumps with integrated frequency converters enhance energy efficiency, improve system reliability, and optimise liquid cooling performance in data centers. Let’s get started.

Cooling loads in data centers rise and fall throughout the day as server activity fluctuates. Fixed-speed motors, which run continuously at one speed, can’t adapt to these changes.

As a result:

Energy is wasted

Unnecessary strain is placed on the system

Overall efficiency is limited

E-pumps with integrated frequency converters offer an alternative way of working. Designed for variable speed operation, these pumps automatically adjust their speed to match real-time cooling demands. When server workloads are lower, they slow down to use only the energy needed to maintain consistent cooling. When demand increases, they speed up to deliver the required performance. This adaptability helps reduce energy consumption while ensuring stable operation.

Beyond adaptability, these E-pumps meet the IE5 efficiency standard according to IEC regulations, which is the highest official energy efficiency rating currently available. As a result of high motor efficiency and duty point adaptation, E-pumps with integrated frequency converters generate less heat. This reduces the cooling required, allowing smaller motor fans to be used. Smaller motor fans help reduce noise levels and support reliable operation even in higher ambient temperatures. For data centers with noise limitations or limited space, this compact, quiet performance is a major advantage.

Thanks to their high-speed capability, E-pumps with integrated frequency converters can deliver the same flow and pressure as larger pumps while requiring less space. This can make it easier to fit cooling equipment into tight CDUs or modular containerised data centers without compromising performance.

These E-pumps also feature a range of wired communication options, such as Modbus, that make integration into modern building management and monitoring systems straightforward.

This digital connectivity gives operators access to real-time data on performance, energy consumption, and system status. As a result, troubleshooting and maintenance are simplified and optimisation is supported.

For example, the flow estimation feature built into these E-pumps can eliminate the need for separate flow meters, … reducing installation complexity and saving CAPEX as well as valuable space in compact CDUs.

Grundfos also offers the option to integrate a CIM550p, also known as Grundfos SOFT PLC, inside the MGE motor. This allows customers to programme the pump directly and customise its operation without the need for a PLC, freeing up additional space inside the CDU. The SOFT PLC-equipped pump can also control other components, such as the FWS balancing valve, as long as they support Modbus RTU communication.

By optimising pump speed and performance, E-pumps with integrated frequency converters help reduce PUE. Using more efficient and intelligent pumps means less energy is wasted on moving cooling fluids and there is less strain on supporting systems. This is essential as a key focus of data centers is optimising electricity use while also minimising operating costs and environmental impact.

Together, these features support the development of intelligent liquid cooling solutions… that help data centers maintain consistent temperatures and optimise energy and water use… while meeting the demands of a growing digital world.