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'HORIZONTAL GRAVITY' - FROM THE MOON

Unrestrained, any vessel will drift between 20km and 70km on one tide.

Restrained by the resistance of generators (or energy storage flywheels), 'power' can be extracted.

'ABUNDANT'  ENERGY

(DEPENDING ON SIZE OF VESSEL)

AVAILABLE FOR APPROX. 3 HOURS

DURING PEAK TIDAL EBB OR FLOW

(APPROX' 12 HOURS / DAY)

When the sun doesn't shine

And the wind doesn't blow

The tides will be running

To and fro

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GUIDES ALSO ACTING AS 'LOCKS' WHEN STATIONARY.

THE CABLE IS NOT ATTACHED TO THE VESSEL.

MULTIPLE CABLES WOULD BE 'FAIL SAFE'..

LOADS AT ANCHOR POINTS CAN BE MINIMISED IF NOT COMPLETELY ELIMINATED WITH THE USE OF HEAVY ANCHOR CHAIN ON THE SEA BED

FOR ESTUARIES AND INSHORE WATERS ONLY

NOMINAL DRIFT DISTANCE 4km.  NOMINAL DRIFT SPEED 0.5m/s.

FRICTION DRIVE PINIONS/PULLEYS DRIVEN BY STATIC ANCHOR LINE/CABLE PASSING ALONG THE DECK  DURING A CONTROLLED DRIFT.

POWER TAKE-OFF FOR MACHINERY, ENERGY STORAGE FLYWHEELS OR GENERATORS.

POWER TAKE OFF AVAILABLE FOR APPROX. 3 HOURS DURING PEAK TIDAL EBB OR FLOW.

(APPROX. 12 HOURS PER DAY).

POWER WILL BE GENERATED WHEN THE SPEED OF THE TIDAL STREAM IS GREATER THAN THE SPEED OF THE VESSEL.

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, small scale trials would be a cost effective method of 'proof of concept'.

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

Large or multiple parachute sea anchors are suggested for trials.

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.

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.

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.

The undersigned has not sought any Patent or Intellectual Property Rights.  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.

21st July 2024.

robertcjones@live.co.uk

STATIC ANCHOR LINE/CABLE(S)

0.5m DIAMETER FRICTION DRIVE

PINIONS/PULLEYS

FIXED TO THE VESSEL

NOMINAL PINION ROTATION SPEED 20RPM

EBB

EBB

FLOW

FLOW

ON BOARD CABLE SCRUBBERS

VESSEL DRIFT SPEED < 0.5M/S

TIDAL STREAM SPEED > 1M/S

VESSEL DRIFT SPEED < 0.5M/S

TIDAL STREAM SPEED > 1M/S

PINIONS DESIGNED TO 'PINCH' CABLE TO ACHIEVE BEST CONTACT

NOMINAL DRIFT DISTANCE 4KM

TRIALS TO DETERMINE MINIMUM VESSEL DRIFT SPEED AND DISTANCE FOR MAXIMUM EFFICIENCY

ALTERNATIVE LAYOUT

GENERATORS (OR ENERGY STORAGE FLYWHEELS) ON FIXED PLATFORMS.

CABLES SECURED TO DRIFTING VESSEL.  SLACK TAKEN UP ON DOWNSTREAM SIDE.

TIDAL STREAMS ARE TOTALLY PREDICTABLE

REGARDLESS OF WIND, WAVES OR WEATHER

'TIDE IS KING'

CONCEPT, CONTENT, RHYMES & WEB DESIGN © 1995-2024 Robert C Jones

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