Performance of mini wave energy harvesting system using single and double linear generators

Ng, Kai Jun (2021) Performance of mini wave energy harvesting system using single and double linear generators. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Waves are a natural phenomenon that packs a tremendous amount of energy as it travels a long distance with minimal to no loss of energy. Waves are caused by winds formed from the difference in environmental temperature in different locations around the globe. However, the energy packed in waves is lost as they crash into coastlines worldwide. In order to make use of the wave energy, wave energy conversion system is introduced. In this project, a wave energy conversion system using single and double linear generators was studied by practical simulation on a scaled-down model of a mini wave generator harvesting system. The effectiveness of single linear generator for different distances and double linear generators for different gap distances in producing electrical voltage was investigated with respect to different speed of wave generator. The setup that generates the highest electrical voltage was determined as the best location of single linear generator and best gap distances for double linear generators with relation to the specific speed of wave generator. The experiment was started off by running preliminary tests using a pre-built test rig. Modifications were performed wherever necessary to ensure the smoothness of the simulation. Results showed that single linear generator generates higher electrical voltage than double linear generators. This is because more linear generators reduce the average power generated per wave energy converter, hence a reduced total electrical voltage generation. This is proven with the comparison in the highest average total voltage generated, where single linear generator generated 1.35mV at 70RPM while double linear generators generated 0.65mV at 50RPM. This shows that the highest average total voltage generated by the single linear generator is 107.69% higher than the double linear generators. The highest total voltage generated with single linear generator is 1.8mV at distance of linear generator A,

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