This is noticeable compared to previous configurations equipped with older aluminum heat exchangers. The Liebert® EFC significantly reduces pressure drops and provides higher annual efficiency and a higher maximum airflow.
Furthermore, it offers high mechanical strength, reduced intrinsic noise, and easy cleaning. This is partly due to the new polymer material it incorporates: it combines high durability with extreme corrosion resistance, resulting in a better balance between water quality and minimal consumption.
The aim is for the new polymer heat exchanger to help data center operators achieve their sustainability goals faster, and the Vertiv™ Liebert® EFC composite heat exchanger is designed to achieve this through the following features.
The main advantages of the Vertiv™ Liebert® EFC composite heat exchanger
Greater annual energy efficiency of between 5 and 19% thanks to a very high heat exchange rate and lower energy consumption associated with air circulation.
Increased resistance to both structural and chemical corrosion, allowing the use of a wider range of water qualities, such as recycled water, and ensuring simpler water management and maintenance.
Water consumption is reduced by up to 15%, with a corresponding increase in water consumption effectiveness (WUE), a parameter associated with greater water recirculation capacity and fewer restrictions on the concentration limits of permitted components in the water.
The Liebert® EFC offers these advantages thanks to its advanced control system, which allows for highly precise temperature maintenance in the unit's different operating modes: dry, with water evaporation, and with integrated mechanical cooling.
The main functions of the Liebert® EFC composite heat exchanger
Although the composite heat exchanger incorporates the latest patent, Liebert® EFC houses many other patented control functions:
Emergency water saving: aims to minimize water consumption during periods of limited water availability.
Cost control: enables the identification of the most effective and efficient operating mode under any operating conditions, based on the site's water and energy costs.
Energy demand limit: limits maximum electrical consumption to a configurable maximum value in emergency power supply situations. This allows for a reduction in the use of the generator, UPS (uninterruptible power supply), and emergency electrical infrastructure.
Winter saving mode: maximizes the system's cooling capacity in low outdoor temperatures by reducing airflow and supply temperature.
In addition to these functions, Liebert® EFC features a quick restart function with an Ultracap buffer battery, ensuring rapid response times and continuous cooling in the event of a power failure.
The controller also incorporates Teamwork functionality, so it does not require any additional external device, allowing the group of units dedicated to the same data store to function as a single entity with optimized temperature control and airflow rates.
All these features and functions make the Liebert® EFC a highly efficient indirect evaporative cooling unit. It combines indirect air-to-air heat exchange and evaporative cooling technology in a single system to achieve pPUE levels of 1.05, while ensuring maximum energy efficiency, optimized water consumption, and minimized operating costs. The new patented polymer heat exchanger maximizes these advantages to deliver even higher levels of sustainability.
This is just a preview of what the Liebert® EFC composite heat exchanger can bring to data centers.
