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Numerical modelling and experimental assessment of cap magnet motion in a small windbelt generator Le, Thi Tuyet Nhung; Vu, Dinh Quy; Dinh, Cong Truong; Nguyen, Duc Trung; Plourde, Frederic
International Journal of Renewable Energy Development Vol 14, No 3 (2025): May 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61102

Abstract

Wind energy shows great potential as a power source for low-energy electronics. A promising innovation in this field is a compact generator based on electromagnetic induction and oscillation, designed with simplicity and efficiency in mind. Small wind-driven generators utilize membrane oscillations and electromagnetic induction to produce voltages of a few volts, offering a potential future alternative to batteries due to their portability and easy power supply. This study focuses on evaluating the parameters that affect the voltage and power output of a small belt-type generator with a maximum wire length of 350 mm, operating at low wind speeds ranging from 2.5 to 6 m/s. The influence of wire length is examined to assess power and voltage output using the shortest practical wire length. Additionally, the effects of membrane oscillation amplitude and the number of coils turns in the electromagnetic setup are also investigated. Two methods were employed in this study: two-way FSI simulations method and experimental tests measuring membrane oscillation, voltage, and power output. Key findings include a 9% error between experimental and simulated oscillation amplitude and a 12% difference between theoretical and experimental voltage results. The oscillation amplitude gradually decreased as the wire length was reduced from 350 mm to 198 mm, with corresponding slight decreases in voltage and power. For the 350 mm wire, the maximum no-load voltage reached 8V and 0.8V under a 1kΩ load; for the shortest wire of 198 mm, the no-load voltage reached 7.5V, but the power output under load was minimal.
Investigating the Effect of Future Orientation on Saving Intention of Generation Z’s University Students in Vietnam’s Northern Region Do, Hoai Linh; Vu, Thi Mai Phuong; Nguyen, Van Giang; Vu, Ngoc Minh; Nguyen, Duc Trung; Tran, Thanh Vinh
International Journal of Business, Economics, and Social Development Vol. 4 No. 4 (2023)
Publisher : Rescollacom (Research Collaborations Community)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijbesd.v4i4.534

Abstract

Young people are often thought to have a lifestyle focusing on enjoyment, which is why issues related to saving among the youth, especially saving money, receive significant attention from society. This issue has been analyzed in some previous studies; however, there is a new factor that has not been explored in the context of Vietnam, which is future orientation. The purpose of this study is to find out the relationship between future orientation, attitude towards saving and saving intention of generation Z university students in Northern Vietnam. The research method used was the combination of qualitative and quantitative methods. The primary data was collected from 531 respondents who are currently studying at universities in Northern Vietnam and the data was analyzed by using SPSS and AMOS software. The structural equation modeling (SEM) method was used, and the results indicate that both future orientation and attitude towards saving have a positive impact on savings intention. Furthermore, the mediating role of attitude in the relationship between future orientation and saving intention was confirmed. Therefore, the results should be applied by governmental agencies, financial organizations and individuals, especially young people, to encourage saving intention, and furthermore, saving behavior.