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'HORIZONTAL GRAVITY' - FROM THE MOON

The potential energy from the above proposal can be calculated from the amount of surface area presented to the tidal stream, the speed of the tidal stream and to a lesser extent the kinetic energy of the drifting vessel.  However, due to the many variables and unknowns in this proposal, not least the effect of 'Betz Law' small scale trials would be a cost effective method of 'proof of concept'.

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The sustained torque (or MW) available at the pinion wheel drive shafts during maximum tidal ebb or flow would prove (or disprove) the concept.

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Anticipating the very high torque values that could be achieved here together with a relatively slow input rotation speed a 'smart' gearbox would be required.  A CVT (constant velocity transmission) fluid drive is envisaged. The DAF 'Variomatic' drive developed in 1958 by the Dutch motor manufacturer could also be a candidate for development.

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With the use of MPPT (Maximum Power Point Tracking) for all design parameters, maximum efficiency can be achieved.

 

Vessels with multiple lines/cables drifting 'beam on' to the tidal stream would maximise power output.

 

Low profile vessels would be less affected by wind.

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It would be advantageous to fit the vessel with adjustable drag inducing surfaces, or 'spoilers', in order to increase or decrease 'power'.  Additional automatically controlled surfaces which would reduce pitch, roll and yaw in rough sea conditions could be fitted. These would also assist the vessel to follow a predetermined track thereby reducing the load on guides and cables.

 

The use of Energy Storage Flywheels for this proposal would have advantages.

1. Smooth out turbulent input.

2. Extend output at slack tide.

3. Stabilise output.

4. Power converted from energy storage flywheels by on-board generators only while stationary at slack tide i.e. shore connection attached only when stationary.

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This proposal would be relatively inexpensive to develop, less restricted in location, does not require significant depth, easy for access and maintenance, could use existing vessels, less of a hazard to fish and other marine life and most importantly reliable.

 

Multiple 'HGU's' (Horizontal Gravity Units) operating at peak tidal ebb or flow positioned around our estuaries or inshore waters (well away from shipping lanes or navigation channels) would give continuous 'clean' power 24/7.

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The undersigned has not sought any Patent or Intellectual Property Rights.  He also apologises for the sketch, he no longer has a CAD package.  This proposal has been developing over the past 10 years and incorporates feedback from the academic community and others.

 

Robert Jones.

Retired Engineering Designer/Draughtsman, Surrey, UK.

RYA Yacht Day Skipper.  UK PPL.  US PPL.

Constructive comments or 'Business Angels' welcome.

12th April 2024.

robertcjones@live.co.uk