OblinEngine is a patent-protected mechanical long-duration energy storage technology that uses compressed air at depth to create hydraulic uplift, with stored energy recovered through established hydroelectric generation equipment.
OblinEngine is currently at Technology Readiness Level 5. The next development stage is an integrated Australian demonstrator designed to progress the technology from TRL 5 to TRL 6.
The current TRL 5 position is supported by completed shallow hydraulic testing and deep-shaft testing of the core hydraulic uplift mechanism.
The proposed TRL 6 demonstrator will integrate the complete energy pathway, including compressor electrical input, compressed-air delivery, hydraulic uplift, turbine-generator output, auxiliary loads, instrumentation and controls.
OblinEngine stores energy using compressed air. When electricity is required, compressed air is introduced at depth into a water-filled uplift shaft.
Rising air bubbles reduce the average density of the air-water mixture inside the uplift shaft. The resulting density difference creates upward water movement and hydraulic head.
That hydraulic energy can then be recovered through a conventional hydroelectric turbine-generator before the water returns through the closed-loop system.
OblinEngine has progressed beyond concept development through prototype construction, shallow hydraulic testing and deep-shaft testing.
The proposed Australian demonstrator is specifically intended to take OblinEngine from its existing TRL 5 development position into integrated system demonstration toward TRL 6.
The project will bring the principal system elements together under instrumented operating conditions and measure performance across the complete energy pathway.
Independent technical assessment is intended to determine whether the resulting evidence supports progression to TRL 6.
Replace remaining system-level assumptions with measured electrical, pneumatic and hydraulic performance data.
Operate the compressor, air-delivery system, uplift shaft, hydraulic circuit and turbine-generator as one instrumented system.
Generate evidence suitable for independent technical assessment against the requirements for progression toward TRL 6.
OblinEngine is protected by UK Green Patent GB2601502, granted in March 2023.
The patent covers the underlying energy-storage and hydraulic-uplift approach used by the OblinEngine system.
The immediate objective is to progress OblinEngine from the existing TRL 5 evidence base to an integrated TRL 6 demonstration.
Final round-trip efficiency, capital cost, operating life and commercial performance are not represented as proven. The purpose of the next-stage demonstrator is to generate the measured evidence required to evaluate them.
Successful TRL 6 progression would provide a substantially stronger basis for subsequent commercial engineering, customer validation, investment and larger-scale development.
Review the existing evidence and the proposed Australian integrated demonstrator designed to progress OblinEngine from TRL 5 to TRL 6.