Linear Generator Performances Determination For Wave Harvesting System

Saraswathy, Rajandran (2019) Linear Generator Performances Determination For Wave Harvesting System. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) Linear Generator Performances Determination For Wave Harvesting System.pdf - Submitted Version Download (606kB)

Abstract

Wave energy is a classic example of renewable energy. The energy amount is measured by speed and height of wave, wavelength and water density. The stronger the waves, the more capable it is to produce power. Motion energy that is produced by the wave energy is used to do tasks such as generate electricity, powering plants and pumping of water into reservoirs. Wave energy does not emit hazardous gasses to the environment. This is why it is known as completely clean source. On the other hand, fossil fuels, oil, coal and natural gas contribute to pollution as they release dangerous gasses such as carbon dioxide, nitrous oxide, methane and ozone to the atmosphere. Linear generators in wave energy conversion depends on high force, low speed, irregular motion and cost. Their performance varies when they have some changes in applying those requirements. The purpose of this study is to develop a linear generator test rig and investigate the performance of the system by testing different linear generator configuration. An experimental setup was developed consists of DC motor, solenoid magnet, wave plotter and crankshaft shapes. The experiment is conducted using different crankshaft shapes. Plywood was cut in different shapes and named as A (semicircle), B (star), C (spur gear) and D (droplet). Wave plotter was used to determine the wave patterns of different shapes. Multimeter and speed controller were used to collect the current readings. Performance of the system is determined by the current produced by solenoid magnet due to crankshaft shapes. Shape B shows the highest current among the other but the reading starts to drop as the motor speed increases. Speed of motor inversely proportional to the current because as armature current increases, the flux produced also increases due to the series combination. So that, if armature current is reduced, flux is reduced which will increase speed of the motor.

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