Rehabilitation of Flap Gates at Åmli Hydropower Plant
Client: Lysaker & Thorrud AS
End Customer: Å Energi Hydropower AS
Period: 2026-2027
Description
Åmli Hydropower Plant is a key hydroelectric facility in the Arendal watercourse, with an annual power production of approximately 84 GWh. As part of Å Energi’s long-term commitment to upgrading existing hydropower assets, a comprehensive refurbishment of the plant’s gate structures is being carried out. The project includes the refurbishment of flap gates, replacement of sealing systems, upgrading of mechanical components, and modernization of technical systems.
PROXLL is supplying electric heat tracing solutions for frost protection of the three flap gates at the hydropower plant. The scope of supply includes engineering, delivery, and installation of heat tracing systems for the gates and side guides, as well as control panels, temperature sensors, and junction boxes. The total installed power output is approximately 35 kW.
Delivery Scope
- Engineering of Heat Tracing and Freeze Protection Systems
- Supply and installation of heat tracing cables for gates and side guides
- Control and Monitoring System
- Temperature Sensors and Connection Equipment
- Commissioning and Functional Testing
Photo Credit: PROXLL ASResults
A modern, energy-efficient frost protection solution that ensures safe and reliable operation of the three flap gates throughout the year. The system minimizes the risk of ice formation and winter-related operational disruptions while maintaining the functionality and availability of a critical component of the hydropower plant's waterway infrastructure.
Project Manager's Comment
"The project is now approximately halfway through the execution phase, and work is progressing according to schedule. In hydropower projects, operational reliability is critical.
Through close collaboration between Å Energi, Lysaker & Thorrud, and PROXLL, a comprehensive solution integrating heat tracing and control systems has been developed. The solution minimizes the risk of ice formation and ensures reliable operation of the flap gates throughout the winter season. This project demonstrates the value of strong collaboration between the asset owner, contractor, supplier, and specialized technical experts."
Hans-Petter Frydenlund
Project Manager, PROXLL AS
Project Highlights
- Client: Lysaker & Thorrud AS
- End Customer:: Å Energi Hydropower AS
- Technical Consultant: Enestor AS
- Supplier of Heat Tracing and Freeze Protection Systems: PROXLL AS
- Facility: Åmli Hydropower Plant
- Annual Energy Production: Approx. 84 GWh Vis flere linjer
Application Area: Industry - Hydropower/Renewable Energy
PROXLL AS
PROXLL AS is a Norwegian engineering and technology company delivering complete electric heating solutions for the industrial, energy, infrastructure, and hydropower sectors. The company specializes in the design, engineering, supply, and installation of heat tracing systems, heating elements, and temperature control solutions for demanding industrial environments. Established in 1910, PROXLL has more than 116 years of industrial experience. The company's expertise in electrical heating and industrial heat solutions dates back to 1948, serving customers across Northern Europe.
Lysaker & Thorrud
Lysaker & Thorrud AS was established in 1974 and is a leading Norwegian supplier of steel structures and gate systems for the hydropower industry. The company designs, manufactures, and installs dam gates, pipelines, and trash racks for hydropower facilities throughout Norway.
Å Energi
Å Energi is Norway’s largest renewable energy group, operating across power generation, grid infrastructure, and energy supply. The company was established in 2022 through the merger of Agder Energi and Glitre Energi. Å Energi generates approximately 13 TWh of renewable hydropower annually.
Enestor
Enestor is a consulting engineering company established in 2015, specializing in hydropower, mechanical systems, and technical project execution. The company provides engineering and advisory services to the energy and industrial sectors.
Photo Credits:
Å Energi,
Enestor AS,
and PROXLL AS (used with permission).