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Tata Steel to improve carbon footprint with novel heat storage technology

Tata Steel to use novel EnergyNest thermal energy storage technology to capture exhaust gas heat and reuse the energy for internal batch production at one of its facilities in the Netherlands.

The EnergyNest thermal energy storage system (illustration courtesy Tata Steel).

The EnergyNest thermal energy storage system (illustration courtesy EnergyNest).

Europe’s second largest steel manufacturer, Tata Steel has announced that it intends to utilise its exhaust gas energy from production to cover some of its own energy demand at a production unit on its production complex in IJmuiden, The Netherlands. The plan includes the installation of a novel thermal energy storage (TES) technology that will enable storage of captured intermittent high temperature exhaust heat from production for later use.

Concrete heat storage

The thermal energy storage (TES) technology has been developed by EnergyNest (EN), a Norwegian technology start-up based in Billingstad. EN has developed a unique and patented design for a modular solid-state thermal energy storage system that can be applied in various markets that require high temperature thermal energy storage for many hours or days. EN’s technology is field proven at the Masdar Institute, United Arab Emirates (UAE).

The technology consists of a TES system, which is made up from a large number of individual elements, connected through pipes in series and parallel. A storage element consists of a state-of-the-art concrete storage medium called “HEATCRETE” with integrated heat exchanger tubes contained inside a steel casing. Multiple storage elements are stacked inside a steel structure. This allows for easy transportation, on-site assembly, and allows the majority of piping works to be prefabricated before installation. The system stores and transfers energy using oil, steam, or other heat transfer fluids, and, according to EN, has less than 1 percent losses over a 24-hour period.

Waste heat utilisation

The EnergyNest technology can support Tata Steel in achieving its carbon footprint reduction targets by capturing current waste heat and making it accessible for later use, thus providing an economic benefit. This economic benefit relates mainly to savings in natural gas consumption, and consequently to carbon dioxide (CO2) emission reduction. The system is easy to integrate and operate since it contains no moving parts – the complete solution for “energy-on-demand” will be developed together with EPC provider Jord Oil & Gas Systems B.V., a Rotterdam based company that designs, manufactures, commissions, and services custom-engineered process equipment, modular skids and turnkey plants for the steel, oil and gas, chemical and petrochemical industries.

 

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