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Germany: Energy Storage

MAN and ABB Introduce Three-Way Energy-Storage System

| Editor: Alexander Stark

The Hofim turbo-compressor runs on surplus energy from renewable resources, compressing CO2 in the cycle, which is heated to 120°C.
The Hofim turbo-compressor runs on surplus energy from renewable resources, compressing CO2 in the cycle, which is heated to 120°C. (Source: MAN Turbo & Diesel)

MAN Diesel & Turbo Schweiz has signed a cooperation agreement with ABB Switzerland for the development, production and commercialization of a three-way energy-storage system. The new Electro-Thermal Energy Storage system (Etes) stores large-scale electricity, heat and cold for distribution to consumers.

Augsburg/Germany — The energy-storage system uses surplus renewable-electricity to generate heat and cold for storage in insulated reservoirs during a so-called ‘charging cycle’. The heat and cold can be converted back into electrical energy on demand. Moreover, it is possible to distribute the stored cold and heat to different types of consumers. For instance, heat can be transferred to district heating, the food-processing industry, laundry facilities, etc., whereas applications for the cold include cooling data-centers, ice-hockey arenas or air-conditioning for skyscrapers. The system is location-independent and designed to suit various boundary conditions.

Dr. Uwe Lauber, CEO of MAN Diesel & Turbo, explained that the biggest challenge in building stable, climate-neutral energy systems was the intermittency of renewable energy in power generation and supply. To match an increasing consumer demand for energy with a fluctuating supply, the world needed reliable energy-storage systems, he added. Together with ABB, the company now offers a complete solution for the storage, use and distribution of electrical and thermal energy that the CEO described as groundbreaking.

According to Prof. Dr. Hans Gut, Managing Director of MAN Diesel & Turbo Schweiz, Etes is the only storage system able to store electricity, heat and cold at the same time and also distribute them to consumers.

The turbomachinery technology and the process design of the charging and discharging cycle are the key elements of this energy-storage system. The energy storage system features MAN’s hermetically-sealed turbo compressor Hofim within the charging cycle to compress the CO2 working fluid to its supercritical state at typically 140 bar and ca. 120°C.

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