الفهرس 
ContentsOnly 14 pages are availabe for public view
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Abstract
The wide coverage and the untapped tremendous energy amount stored by the oceans make the harness of sea waves for electricity-generating is promising, where the Earth planet is a planet of oceans that cover around 70% of the earth’s surface, which permits to access widely across the world and areas that are difficult to feed by electricity. In addition, the energy extraction techniques from waves contribute by a share of less than 0.01% of the electricity generation technologies from renewable sources. Therefore, by caring about using more renewable energy sources, it creates a type of competition between energy supplies; thence, making a great contribution to global energy demand and helping in stabilizing energy prices. Nowadays, there is a great variety of techniques developed with the purpose of harness sea waves energy to electricity-producing and commonly called wave energy converters (WECs). Typically, most techniques of wave energy converters (WECs) include a pneumatic or hydraulic interface between the wave converter and the electric generator for electricity-producing smoothly. But, a direct power take-off interface may be a way of increasing the capture and converting efficiency of wave power. This study was carried out to design and manufacture a new model of a single-axis wave energy converter (WEC) that extracts wave energy directly by a mechanical power take-off interface. Thence, analyzing the performance of the converter model and estimating its efficiency for capture and transforming of wave energy for determining the potential of the designed model as a real model when working at a specific place with a certain configuration; by testing the WEC in a wide range of wave conditions that was created and controlled by flap-type wavemaker.This study concluded that there is a specific configuration of the converter fits each wave condition for optimum performance that able to work by the efficiency of 10% to capture and convert the wave power. Also, the optimum performance for a selected place for installing the device should be performed starting at the design stage. One of the major condition in the design stage of the WEC unit for the optimum performance is that the appropriate length of the WEC buoy (i.e., the length that is parallel to the wavelength propagation direction), should be designed with a length is equal or among (29.4 to 33.3 %) of the prevailing wavelengths. Eventually, by following the design criteria, it has been estimated the electric power that the designed model as a real model would extract when working in the deep waters of the Mediterranean Sea along the northern coastline of Egypt.