Low-cost ocean wave energy converter kit as a teaching tool of a new alternative energy source

Abstract

This research aims to develop an ocean wave energy converter kit from low-cost materials as a teaching tool. The kit is developed using the working principle of a wave energy converter that uses a buoy as a system drive and a weight balancer that is connected to a chain. The dimensions of the kit are 6.7 × 0.3 × 0.4 m (length × width × height) with the ratio of the final wheel used is 1:40. The kit generated electricity when the system was driven by a buoy that utilized vertical wave action. The test kit was carried out in the marine engineering laboratory through three stages each using a wave period of 1 s, 2 s, and 3 s at a wave height of 0.1 m, 0.15 m and 0.20 m. The observed data was the voltage generated by the kit using a digital multimeter. The observed data is the amount of voltage generated by the developed kit, and each observation takes 60 s. Based on observations during the experiment, the kit was functioning properly. The results showed that with a greater wave period, the kit produced smaller voltage, and with a greater wave height, the kit produced greater voltage. We finally found that the voltage generated by the kit was affected by the wave period and wave height.

Simple Floating Ocean Wave Energy Converter: Developing Teaching Media to Communicating Alternative Energy

“…Validation of the instrument used as a product assessment rubric given to material and media experts. The development stage is developing media that produces a product as a simple ocean wave energy converter (Satriawan et al, 2020). It can be used as a teaching medium in conveying the concept of alternative energy, especially in using ocean wave energy as an alternative energy source.…”

“…Based on observations, in several places along the coast of Bima at a certain depth, the wave height reaches 10 to 25 cm, with waves occurring 40 to 60 times per minute. The wave characteristics are used as one of the factors considered in making media, so that teaching media function properly (Satriawan et al, 2020).…”

“…At this stage, an analysis is carried out to what extent the teaching media related to ocean wave energy as an alternative energy source has been previously developed. Based on the results of the journal analysis, only two articles developed teaching media to communicate the topic of ocean wave energy as an alternative energy source, namely wave energy virtual reality media (WEVR) (Grivokostopoulou et al, 2016) and wave energy converter kits (WECK) (Satriawan et al, 2020). WEVR media was developed to be used in classroom learning, and the development of this media requires substantial funds.…”