Size effect of piezoelectric energy harvester for road with high efficiency electrical properties. (15th January 2023)

• Record Type: Journal Article
• Authors: Wang, Shuai; Wang, Chaohui; Yuan, Huazhi; Ji, Xiaoping; Yu, Gongxin; Jia, Xiaodong
• Is Part Of: Applied energy. Volume 330:Part B(2023)
• Publication Date: 2023-01-15
• Subjects: Energy harvesting -- Stacked piezoelectric energy harvester -- Electrical properties -- Size effect -- Efficiency -- Road; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2022.120379
• Languages: English
• ISSNs: 0306-2619

Abstract

Highlights: A stacked piezoelectric energy harvester inside piezoelectric power generation device is designed considering size-effect. The harvester has high energy output efficiency under road traffic conditions that match automobile parameters. The power generation properties of the existing technology is enhanced. Abstract: In order to further improve the power generation properties of the piezoelectric energy harvester inside the piezoelectric device for road, this paper presents a stacked piezoelectric energy harvester with high electrical output and energy output efficiency for road energy harvesting, which improves the power generation properties of the existing road piezoelectric power technology. Based on the electrical theory, the size parameters related to the electrical properties are clarified. And based on the size effect, the electrical law is analyzed. Subsequently, the output voltage and power of energy harvesters with different sizes are studied under the different traffic conditions. At the same time, considering the processing and testing errors, an energy generation calculation method of energy harvester is deduced, and the energy output efficiency is clarified. The results indicate that the diameter has the greatest influence on the electrical properties, the Φ15-h30 mm energy harvester has the best performance under the random traffic conditions of vehicles with different loads and different speeds. Under the condition of SUV car, the maximum voltage and power are 86 V and 39.2 mW, the generated energy and output electric energy are 69.2 mJ and 14.7 mJ within 2 s, the energy output efficiency reaches 21.4 %. The improvement of the electrical properties of the energy harvester inside the piezoelectric device will be beneficial to the application process of converting road waste vibration energy into clean energy. And the energy generation calculation method will provide a reference for the piezoelectric energy and other energy technologies.