IEH High Voltage Electrode Boiler
Efficient, reliable, and sustainable steam and hot water solutions for industry use.
General information
The PARAT IEH High-Voltage Electrode Boiler is a modern solution for industrial steam and hot water production. It provides a clean, zero-emission alternative to fossil-fuel systems.
Using electricity to generate heat, the IEH boiler eliminates combustion-related emissions, significantly reducing environmental impact and operational costs. Its compact and robust design ensures reliable performance, long service life, and minimal maintenance requirements. The system is well suited for grid regulation, district heating networks, and industrial process steam.
PARAT has successfully used this electrode boiler design since 1993, continuously developing a durable, reliable, and flexible solution.
Boiler principles
The boiler consists of an outer and inner container, where the inner container is electrically insulated from the outer shell. Inside the inner container, electrodes are immersed in water, generating heat through ohmic resistance. The boiler acts as a pure ohmic resistance in the main circuit, providing efficient energy conversion. The water and the inner container form a high ohmic insulated zero point in the star connection between the electrodes. This advanced design ensures a long operational lifespan and minimal wear on electrodes, as the current flux remains low.
The IEH is compatible with 6–24 kV electrical systems and supports power-to-heat applications with nearly a 100% total efficiency rate. It integrates easily into modern energy infrastructures, especially where compact design and emission-free operation are key.
Grid regulation
As renewable energy like wind and solar increases in power grids, the need for dynamic grid balancing grows. The IEH boiler serves as an essential component for grid regulation. It functions as a fast-reacting load, helping maintain grid frequency and absorbing excess electricity. The system supports power-to-heat conversion and demand-side management in renewable-rich regions.
With a response time under 30 seconds, the IEH helps stabilize power networks during peak demand or renewable overproduction. This technology is particularly beneficial in regions with high renewable energy penetration, such as Northern and Central Europe, where grid flexibility is essential. The boiler’s ability to seamlessly integrate with energy storage systems and heat exchangers further enhances its role in efficient power management.
Technical specifications
The PARAT IEH High-Voltage Electrode Boiler is engineered to meet the highest industry standards, ensuring safety, durability, and efficiency.
We deliver CE-marked boilers per PED/2014/68/EU with boiler code EN 12953. Other design codes are available on request.
The electrode boiler is also available in EX-certified standards for Zone 2 hazardous areas, ensuring safe operation in offshore, chemical, and high-risk industrial environments. The Medium Voltage connection cell is designed per EN 61936 for power installations.
- PED/2014/68/EU
- EN 13445: Unfired Pressure Vessels
- EN 12953: Shell Boilers
- EN 61936-1: High-voltage Installations
- EX-certified for Zone 1 and 2 (ATEX)
Control system
The IEH boiler is equipped with an advanced automation and control system, ensuring precise load adjustments and efficient energy management. The boiler includes a Siemens S7 fail-safe PLC for precise load regulation and monitoring. It supports remote diagnostics, SCADA integration, and built-in safety features like overpressure shutdown and emergency stop. The automation system ensures reliable and secure operation in critical environments. Its high-speed response ensures that energy consumption is balanced according to demand, minimizing waste and reducing costs.
Dimensions
The boiler is compact and modular and is available in multiple configurations ranging from 0 to 75 MW in capacity. With pressures up to 70 barg, it fits high-pressure steam applications and retrofits easily into existing plants. Customization options are available to suit specific space and performance requirements, ensuring a perfect fit for any facility.
Zero load
One of the unique advantages of the IEH boiler is its Zero Load technology, a feature that allows the system to remain in standby mode without consuming power. Zero Load mode allows the boiler to stay grid-connected and ready without consuming power, which reduces wear and standby energy use, ideal for systems needing fast response without energy waste. It adds flexibility in grid stabilization and energy cost optimization.
Steam solutions
The IEH produces high-pressure steam for industrial use. It can be customized to deliver the required steam output (tons per hour) at the appropriate pressure levels, ensuring a stable and efficient steam supply.
Industries such as pharmaceuticals, food processing, paper production, and chemicals require clean and controlled steam solutions. The electrode boiler offers instant load adjustment, meaning it can quickly meet demand fluctuations without excess energy consumption. Additionally, its electrically powered operation eliminates the need for fossil fuels, reducing carbon footprint and aligning with global sustainability goals.
Super heating
For industrial processes requiring superheated steam, the IEH boiler offers an integrated electrical superheating system. This allows steam to be heated beyond its saturation temperature, ensuring that customers receive precisely controlled high-temperature steam.
This seamless integration of the superheater ensures efficient energy use while maintaining precise temperature control. The super heater system is customized based on flow rate, pressure levels, and temperature demands, allowing industries to optimize their energy consumption while achieving the required steam conditions. This is useful for chemical processes, power generation, or any high-temperature steam demand.
Hot water solutions
The IEH Boiler is a strong fit for district heating and industrial hydronic systems, where it provides the perfect solution to replace fossil-fuel-based heating with clean electric heat. By installing a thermal storage tank, industries and heating networks can store large amounts of energy when grid regulation signals demand it and release that energy when needed.
Hot water is generated in the upper chamber, where the electrodes are located. The pressure vessel, pressurized with nitrogen, also acts as an expansion tank. A throttle valve regulates the water level and output temperature. If the setpoint is exceeded, the boiler reduces power automatically.
Hot water is generated by circulating boiler water through the upper chamber, where the electrodes are mounted. The boiler vessel is pressurized with nitrogen, and due to its relatively low water volume, it also functions as an expansion vessel. If the setpoint is exceeded, the boiler reduces power automatically. The output is controlled by a throttle valve, which regulates the water level in the upper boiler chamber.
Water conductivity is constantly monitored and optimized by the electrode geometry, which minimizes consumption and maintains stable output. Optional equipment includes control valves, heat exchangers, and pre-piped skids to simplify integration.
Steam boiler
Weight data is given for 16 barg design pressure. Size based on 10 kV. Steam based on 100°C Feedwater temperature. Changes may occur.
* If circulation pumps are placed at same level as boiler, an additional height must be added for pump NPSH.
Hot water boiler
Weight data is given for 6 barg design pressure. Size based on 10 kV. Changes may occur.
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