ONE MACHINE. ONE PTO. TWO PURPOSES.
ESWave is TWEFDA’s core offshore machine: a point absorber when generating, a gravitational storage system when storing, and a platform designed to change role as the energy system changes.
AN EMERALD. A SAPPHIRE. AND THE WAVES.
The name was conceived as part of the product story, not as a technical acronym alone. ESWave is presented as a valuable offshore asset — a jewel that must be green in purpose and protected in the ocean.
GREEN BY PURPOSE.
The emerald represents the environmental ambition of the machine: renewable energy, reduced dependency on electrochemical storage, attention to wildlife protection and the possibility of creating a small resting point for marine birds.
PROTECTED IN THE OCEAN.
The deep-blue sapphire represents the sea and the need to protect a valuable asset. Portability and the jacking-up strategy are intended to improve survivability, inspection and maintenance in demanding offshore conditions.
A POINT ABSORBER THAT CAN BECOME A STORAGE MACHINE.
Generation function
When generating, ESWave is a point-absorber Wave Energy Converter. A buoyant body follows the sea surface while the PTO reacts against a fixed reference connected to the seabed.
Within that motion, TWEFDA introduces Weight-Changing Energy: the machine changes its state so that what goes up differs from what goes down.
Storage function
When storing, external or internally generated energy can be used to raise the machine and store gravitational potential energy — effectively creating a pumped-hydro behaviour in the ocean.
When that stored energy is released, the tidal range can add a second energy contribution over time.
HYBRID IN GENERATION. HYBRID IN STORAGE.
Hybrid generation
01 — Wave Energy
Relative motion between sea surface and seabed.
02 — Weight-Changing Energy
A non-reciprocal mechanism designed to improve the energy harvested from that motion.
Hybrid storage
03 — Gravitational Storage
Mechanical energy stored as height and mass.
04 — Tidal Range
A complementary energy flow during release.
NOT 24/7 GENERATION.
24/7 ENERGY MANAGEMENT.
The strongest value proposition is not that the machine should generate all the time. It is that the same asset can remain useful when generation is not the function the grid needs.
Power needed
Generate.
Surplus power
Store.
Conditions change
Switch mode.
WHAT GOES UP DIFFERS FROM WHAT GOES DOWN.
TWEFDA is exploring a non-reciprocal energy conversion mechanism in which the machine’s behaviour changes between upward and downward motion. The concept is currently positioned as an in silico proof of concept and remains subject to physical validation.
Lower-weight ascent
The system is configured to reduce the load associated with upward motion.
Higher-weight descent
The system is configured to increase the energy associated with downward motion.
PORTABLE. PROTECTABLE. MAINTAINABLE.
Portable
Designed to be towed rather than carried by specialist heavy-lift equipment where practical.
Survivable
Jacking-up and controlled operating states are intended to help protect the machine in severe conditions.
Maintainable
Major maintenance can be supported by raising the device or towing it to shore rather than requiring high-altitude offshore access.
Integrable
ESWave is intended to work as part of a wider Association and Hub rather than as an isolated product.
ONE ESWAVE CAN GENERATE OR STORE.
The next step is what happens when several machines coordinate their roles.
