Net-Zero Heat System

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Deployed by 4 companies

Stores renewable electricity as heat for industrial processes

Page last modified
May 27 2025

The Net-Zero Heat System from Kraftblock is a high-temperature thermal energy storage system designed to replace fossil fuels used for process heat generation in industries. It operates by converting renewable electricity from the grid or a plant's own sources into heat with 98% efficiency. The heat can then be stored in compact Kraftblock containers for minutes up to two weeks at temperatures ranging from 50°C to 1,300°C. When needed, the stored heat is discharged and adapted without energy loss to supply the required temperature for industrial processes.


The system allows the utilization of cheap or surplus renewable electricity when available, enabling a shift in energy availability to provide 24/7 operation. The thermal energy storage acts as a buffer, decoupling the electricity supply from the heat demand. This approach aims to decarbonize high-temperature industrial processes, such as those found in the steel, glass, ceramic, and chemical industries, by transitioning them to renewable energy sources. The modular and adaptable design of the Net-Zero Heat System allows for customized layouts tailored to specific process and facility requirements.

Pros & Limitations
1
Allows the use of renewable electricity for industrial processes
1
Enables storing renewable energy from minutes to weeks in compact storages at high temperatures up to 1,300°C
1
Reduces energy costs by utilizing low-cost or surplus electricity and avoiding carbon emission costs
1
Improves energy efficiency by utilizing waste heat
1
Provides flexible and adaptable solutions for different industrial processes and facilities
1
Uses sustainable and low-cost materials without rare earths
Specification
Title Description
Core Tech
Energy Storage/Battery
Industry
Energy Storage
Description
A thermal energy storage system that stores renewable electricity as heat and supplies carbon-free process heat up to 1,300°C
Features
Stores heat from minutes to two weeks in compact containers, Converts electricity to heat with 98% efficiency, Discharges heat as air, steam, thermal oil, water or gas, Adapts heat temperature from 50°C to 1,300°C for processes
Applications
Steel & Metal industry, Pulp & Paper industry, Energy & Utility sector, Glass & Ceramics industry, Food, Beverages & Pharma industry, Chemical industry, Oil & Gas industry

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Technology Readiness Level

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[8/9]

Development Technology demonstration Mature / Proven
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Kraftblock is a company that has developed an innovative, high-temperature thermal energy storage system designed to enable industries to transition to renewable energy sources. Their technology allows for the storage of thermal energy generated from renewable electricity, enabling a consistent supply of heat, from 50°C to 1,300°C, for various industrial processes, such as in the steel, pulp and paper, energy and utility, glass and ceramics, food and beverages, chemical, and oil and gas industries. Kraftblock's system can store thermal energy for periods ranging from minutes to weeks, providing a flexible and sustainable solution for decarbonizing industrial heat processes by utilizing affordable, renewable electricity. The company aims to address the challenge of decarbonizing hard-to-abate sectors by offering a unique energy storage solution that bridges the gap between intermittent renewable energy sources and continuous high-temperature heat requirements.

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