THE GRAVITY RAM

Performance

 


Flexibility of the Gravity Ram


The performance of the Gravity Ram is infinitely adjustable between its design parameters. The Gravity Ram can be constructed to operate in a range of coastal conditions to produce power very cheaply indeed and indefinitely.
The Independent Assessment, carried out by Brunel University, includes figures showing predictions of design parameters, based upon their calculations, for the Gravity Ram in a tidal situation. It should be noted however that the University's calculations are based on larger scale installations. The Gravity Ram is equally applicable where the power output requirements are smaller.
Working Pressure
Time of Operation

 









 

 

Working Pressure
The pressure at which the gravity ram operates depends on three factors. First, the weight of the piston and flotation assembly (which can be varied with extra weight being added on top). Second, the bore or volume of the cylinder. Third, the inlet/outlet valve aperture.
A heavy piston assembly on a narrow bore brings more pressure to bear per square inch. Conversely a lighter assembly on a large bore cylinder brings less.

Time of Operation
The operating cycle of the gravity ram is determined by the time between tides, but this can also be varied by the size of the aperture of the outlet/inlet valve. A small bore valve gives a longer emptying time and a big bore valve a shorter one.

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