ASSESSMENT OF PIEZOELECTRIC PAVEMENT ENERGY HARVESTING FOR DISTRIBUTED POWER SUPPLY IN URBAN TRANSPORT SYSTEMS

Tóm tắt

This study investigates the feasibility of applying piezoelectric pavement technology in Vietnamese urban roads to harvest energy from traffic loads, using survey data from Route 353, Hai Phong. Based on PCU conversion factors from TCVN 13592:2022, a daily traffic volume of 30,873 vehicles corresponds to 62,710 axle passes. At a baseline configuration of 40 modules per 100 m, the harvested energy is only 20-80 Wh/day/km, far below the demand for street lighting (~12,000 Wh/day/km). However, increasing density to 150-200 modules per 100 m with a hit probability p_hit ≥20% yields 0.3-0.4 kWh/day/km (110-146 kWh/year), sufficient to power distributed infrastructure such as electronic signage, surveillance cameras, or ITS sensors. Estimated investment costs of 0.85–1.50 billion VND per 100 m highlight economic challenges, yet the technology provides added value by enabling distributed power supply, reducing cabling costs, and improving energy autonomy. The findings confirm the technical feasibility of piezoelectric pavements for smart transport infrastructure in Vietnam, while recommending pilot projects, development of national standards, and hybrid integration with photovoltaics to enhance system efficiency.