OblinEngine has progressed through modelling, prototype construction, shallow hydraulic testing and deep-shaft testing. The evidence generated so far forms the engineering basis for the next full-depth Australian demonstrator.
The development program has been staged to test the underlying hydraulic principle, identify scale effects and progressively reduce technical uncertainty before a larger integrated demonstrator is built.
Initial modelling and system design established the proposed relationship between compressed-air injection, hydraulic uplift and recoverable water flow.
Controlled prototype testing was used to measure air input, water movement and hydraulic head under shallow experimental conditions.
Testing at approximately 92.5 metres provided evidence that the hydraulic uplift principle continued to operate at substantially greater depth.
The next stage is intended to integrate the main system components at greater depth and generate independently verifiable TRL 6 data.
Publicly stated performance data is limited to results measured during completed testing. Commercial-scale performance remains subject to further demonstration.
Early testing focused on whether controlled compressed-air injection could generate measurable water uplift and hydraulic head in a repeatable way.
These tests allowed the development team to observe the relationship between injected air, water flow, bubble behaviour and resulting hydraulic head under controlled conditions.
One measured result from the shallow program was an approximate water-to-air flow relationship of 8.36:1 at approximately 175 mm hydraulic head.
Demonstrate the underlying mechanism, establish measurement methods and generate data to support progression to deeper testing.
Illustrative image of two-phase air-water flow. It is not presented as a photograph of the measured shallow test.
The next major development step was deep-shaft testing at approximately 92.5 metres. This was intended to determine whether the hydraulic uplift mechanism remained measurable under materially greater water-column depth and injection pressure.
During deep testing, approximately 2.4 metres of hydraulic head was demonstrated. This result provided further evidence supporting progression to a larger integrated system.
The deep test did not represent a commercial-scale OblinEngine installation. Its purpose was to generate engineering evidence relevant to scale-up.
Conceptual shaft visualisation, not a photograph of the completed 92.5 m test installation.
The next demonstrator is being designed around measured engineering data rather than visual observation alone.
Instrumentation is intended to capture the principal energy and hydraulic variables needed to assess actual system performance.
Measure hydraulic head, flow, electrical generation and compressor input under controlled operating conditions.
Demonstrate that measured performance can be reproduced across multiple operating runs and conditions.
Generate data suitable for review by an independent engineering or technology-validation body.
Improve understanding of how shaft depth, air injection, water flow and turbine selection affect larger systems.
Characterise operating behaviour sufficiently to define future automated control strategies.
Replace assumptions with measured inputs for future cost, efficiency and commercial design work.
OblinEngine distinguishes between what has already been physically measured and what remains a future design objective.
This approach is intended to make technical development easier to assess and to avoid overstating commercial readiness before the relevant evidence exists.
TRL 5 is the current development status. TRL 6 is the objective of the proposed integrated Australian demonstration.
The next project is intended to move from component and deep-shaft evidence to integrated, instrumented system validation.