20 MW power supply with HGY generator sets for the capacity market in the United Kingdom

HIMOINSA, an international leader in the design and manufacture of power technology solutions and part of Yanmar Energy Systems, is supplying ten HGY Series generator sets with a total critical power output of 20 MW, ensuring a reliable power supply with a reduced carbon footprint.

The project, carried out for the capacity market in the United Kingdom, required generator sets that are ready to deliver power at any moment. The ten installed units operate in synchronisation with each other and with the grid, under the supervision of an intelligent control system that ensures stable and safe operation under all conditions. Real-time remote monitoring, combined with communication redundancy and constant power export, makes it possible to maintain an uninterrupted flow of electricity.

The project based on the HGY Series is an important step in terms of sustainability, efficiency and reliability. It combines the most advanced technological solutions, such as HIMOINSA generator sets with Yanmar YG engines operating exclusively on HVO100 fuel. As a result, the power plant guarantees NOx emissions below 190 mg/Nm³, reducing them to a minimum thanks to the SCR system, while also delivering very high power output obtained from 1 litre of engine displacement.

A sustainable solution and reduced carbon footprint

This is one of the modern installations in the United Kingdom operating on HVO100, equipped with advanced exhaust gas after-treatment systems and using this renewable fuel exclusively. HVO100 is a plant-based biofuel that significantly reduces the carbon footprint compared to conventional diesel fuel, while maintaining stable and reliable performance in mission-critical applications.

The HGY Series has been designed to meet the most demanding environmental requirements, including the Mid Combustion Plant regulations adopted by DEFRA in the United Kingdom. These regulations apply to generation plants from 1 MW to 50 MW, especially those that may operate for more than 500 hours per year.

For exhaust gas treatment, the generator sets are equipped with a modern SCR – Selective Catalytic Reduction system. This solution involves injecting a urea solution into the hot exhaust gas flow, which triggers a chemical reaction that converts nitrogen oxides (NOx) into nitrogen and water vapour – compounds that are harmless to the environment.

In addition, the SCR system used in the HGY Series is integrated with the engine’s electronic control unit, enabling real-time monitoring of parameters such as temperature, pressure and NOx concentration. This integration ensures full process control, reduces the risk of malfunctions and extends component life. As a result, NOx emissions remain below 190 mg/Nm³, positioning this installation among the most advanced sustainable power solutions in Europe.

The combination of the SCR system with the exclusive use of HVO100 fuel makes this power plant a benchmark example of a modern approach to energy generation. The installation not only meets the most stringent sustainability standards, but also offers very high efficiency in the use of the power unit, which means a lower carbon footprint, more efficient use of resources and a significant reduction in costs throughout the entire life cycle of the project.

Advanced acoustic engineering

The project required an advanced acoustic solution. The HGY Series uses modern acoustic engineering technologies, making it possible to achieve sound attenuation levels of 80 dB(A) at maximum output. This flexibility allows the installation to be adapted to the strict acoustic requirements in force in the United Kingdom, limiting its impact on the surroundings and meeting high environmental standards.

Each generator set was designed using acoustic panels of varying densities installed on the walls, ceiling and floor. Mineral wool and specialised foams were used to effectively absorb sound waves. In addition, integrated exhaust silencers provide noise reduction in the range of 30 to 45 dB, maintaining low sound emission levels even when operating under high load.

HIMOINSA, in cooperation with its acoustic engineering team, developed a solution complemented by optimised airflow, managed through a dual-module ventilation system and self-regulating remote cooling. The system adjusts airflow intensity to current thermal requirements. This design not only guarantees high heat dissipation efficiency, but also reduces noise generated by air movement and auxiliary power consumption. As a result, the installation can operate intensively in an urban environment while maintaining reliable power supply and compliance with high environmental standards.

In addition, the ECU uses intuitive diagnostic software that supports remote monitoring and predictive maintenance. This facilitates comprehensive management of the installation and increases its operational availability. The combination of technological innovation and mechanical robustness makes Yanmar engines the foundation of reliability for this 20 MW project.

24/7 connectivity and control

The 20 MW project, configured with ten synchronised and continuously monitored generator sets, guarantees a stable, safe and uninterrupted power supply. Advanced connectivity strengthens the installation’s ability to operate under constant load and ensures continuity of operation even in the most demanding conditions.

This is a model of intelligent and redundant supervision required in mission critical environments, where reliability is an absolutely fundamental requirement. Continuous monitoring, instant parameter analysis and full control over system operation make it possible to maintain the highest level of energy security.

A complete solution: HIMOINSA and Woodlands Power

The project confirms HIMOINSA’s ability to design and manufacture complete power solutions for mission-critical investments. The company’s engineering and manufacturing capabilities were complemented by the work of Woodlands Power, HIMOINSA’s strategic partner in the United Kingdom, which supported the manufacturer’s engineers during the installation of the generator sets – from delivery through to the commissioning of the installation.

As part of this integrated solution, HIMOINSA assigned an engineer to the project who was responsible for supervising the delivery of the generator sets and their start-up on site. HIMOINSA’s role was not limited solely to technical supervision. The company also provided ongoing specialised support, resolved current operational issues and acted as a coordinator between all parties involved in the project.

This technical and operational cooperation structure gives the investor full control over the implementation of every stage of the project, fast decision-making and a complete view of the entire system. The cooperation between Woodlands Power and HIMOINSA engineers guaranteed that the product, developed in accordance with high technical standards, was delivered to the site while maintaining the quality, reliability and performance required in mission-critical projects.

Woodlands Power, together with the engineering and technical team of HIMOINSA Power Solutions in the United Kingdom, worked in close cooperation, using local expertise and operational capabilities. Thanks to this, the solutions developed at the design and manufacturing stage were effectively translated into a real, fully functional installation, ready to deliver 20 MW of critical power to the British market.

Service access and maintenance

The power plant project in the United Kingdom was designed with a strong focus on easy service access and comprehensive operational maintenance. This is an installation intended for continuous operation and ready to deliver power at any moment, which is why ease of servicing, good accessibility of components and long service intervals – up to 500 hours between oil changes and as much as 30,000 hours before major overhaul – represent significant value for the user.

HIMOINSA offers generator sets designed for fast inspection of key components, which reduces downtime and simplifies routine servicing. Thanks to this practical approach, it is possible to optimise the life cycle of the entire installation and maintain maximum equipment availability.

The Plug & Play solution, which includes a copper busbar system and internal connections for the SCR system, makes it possible to simplify installation start-up and significantly facilitates cabling and servicing work. This 360° approach to accessibility and maintenance ensures that the power plant operates with maximum efficiency and reliability, confirming HIMOINSA’s ability to provide uninterrupted critical power supply.

Summary

The commissioning of this 20 MW continuous power plant in the United Kingdom confirms that the HGY Series meets the most demanding needs of the modern energy market. Operating exclusively on HVO100 fuel, combined with highly efficient Yanmar engines delivering high power output from 1 litre of engine displacement, ensures stable, efficient and more sustainable power supply.

Thanks to the comprehensive execution carried out in cooperation with Woodlands Power, the project successfully brings HIMOINSA engineering to a real facility and provides the investor with a turnkey solution – ready for uninterrupted operation and meeting high standards of reliability, performance and environmental responsibility.

Key project highlights

• 10 HGY Series generator sets providing 20 MW of continuous critical power
• NOx emissions below 190 mg/Nm³
• Very high power output obtained from 1 litre of engine displacement
• Modern SCR system ensuring high efficiency and low emissions
• Acoustic solutions with configurable noise levels up to 80 dB(A)
• Exhaust silencers reducing noise by 30–45 dB
• Optimised airflow and self-regulating cooling
• Woodlands Power as the local partner responsible for the complete installation of the equipment
• 360° maintenance support: accessible architecture and Plug & Play solution
• Yanmar engines: start-up in less than 8 seconds and maximum reliability
• 24/7 connectivity and control: remote monitoring and uninterrupted operation
• 20 MW of continuous power – a sustainable, reliable and mission-critical-ready solution