Development of hybrid renewable energy based portable power supply

Nikom, Anuttik (2023) Development of hybrid renewable energy based portable power supply. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Camping activities nowadays involve equipment that relies on electricity supply. Therefore, a portable power supply is one of the best solutions that meet this purpose. However, a portable power supply normally comes with a single source of power supply, and problems might arise if this single power supply is suddenly not functional. Thus, this project aims to rectify this by proposing a hybrid portable power supply that consists of a combination battery, solar panel, and mechanical pedal. PSCAD software indicates a constant capacitor voltage which means that a consistent electricity supply is achievable, and the result also shows positive and negative converter current readings. The preliminary result shows that the battery in a portable power supply is charging and discharging. The simulation will be validated with the development of hardware. By carrying out hardware development, this project obtained analysis results on a variety of cable sizes with the aim of reducing charging time. Based on the results of the solar energy analysis carried out, the 10.0 mm2 cable has a very good impact on the battery charging time reduction process in the period taken from 20% to 100% state of charge, which is 7 hours. As for the results of the cable size analysis by the mechanical pedal, the lowest time to reach 100% of the state of charge is 8 hours and 33 minutes for a 10.0 mm2 cable. Additionally, this project includes the ability to generate power using solar energy and a mechanical pedal in order to shorten charging times by utilizing various cable sizes. In addition, analysis on a variety of loads is also carried out in order to obtain the results of the efficiency of the hybrid portable power supply. According to various load evaluations, when used with a fan speed of 3, the battery takes at least 47 minutes to reach a state of charge of 20%, resulting in a power consumption of 33.7W. The lowest discharging rate for the load analysis is fan speed position 1, which is 19.5 watts and takes 2 hours to reach 20% of the hybrid portable power supply's state of charge. In conclusion, it is hoped that this project will reduce the cost of outdoor activities and maximize the energy used to power up camper’s gear and offers a versatile option for outdoor activities.

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