Apparatus for producing electricity from a moving fluid and method

An apparatus for producing electricity from a moving fluid comprising:

• an elongated body having a longitudinal axis, the elongated body being arranged to be attached to a ground or seabed and exposed to the moving fluid;
• at least one tensioned cable, which is supported in tension from the elongated body, and which is arranged at least in part inside the elongated body and further arranged to oscillate or vibrate upon oscillation of the elongated body imposing wavelike motions upon the at least one tensioned cable hence the at least one tensioned cable moves or vibrates relative to both the ground or the seabed and to the elongated body;
• and
• at least one energy harvester for utilizing movement of the at least one tensioned cable relative to the ground or the seabed and the elongated body to produce electric energy,
• wherein the at least one energy harvester further comprises a vibration capture means for capturing at least part of the kinetic energy of the at least one tensioned cable, the vibration capture means further comprising a first capture means and a second capture means, the first and second capture means being arranged to transfer horizontal movement to vertical movement, wherein the first capture means is fixed to the at least one tensioned cable and the second capture means is attached to a support body and arranged to move vertically in use,
• wherein the first capture means comprises:
• a disc having a surface through which the at least one tensioned cable extends;
• and
• a first magnet fixed to the disc and positioned with a first pole of the first magnet directed in a first direction along the longitudinal axis;
• and
• wherein the second capture means comprises:
• a structure having a first side and a second side,
• a spring fixed to the first side, wherein the structure is coupled to the support body via the spring;
• and
• a second magnet fixed to the second side and positioned with the first pole of the second magnet is directed in a second direction along the longitudinal axis that is opposite to the first direction, such that the first magnet repels the second magnet thereby causing the second capture means to move vertically in response to horizontal movement of the first capture means.