Harnessing Acoustic Energy from HVAC Systems Using Piezoelectric Harvesters for Sustainable Micro-Power Applications

Vinukonda Saisrinivas , Manda Baby Sarojini

Piezoelectric Energy Harvesting, HVAC Systems, Acoustic Energy Conversion, Micro-Power Applications, IoT Sensors, Sustainable Energy Solutions, Battery-Free Devices, PZT and PVDF Materials, Low-Frequency Vibration Harvesting, Power Conditioning Circuit, Environmental Monitoring, Wireless Sensor Networks, Smart HVAC Integration

This paper presents a sustainable solution for energy harvesting by capturing acoustic energy produced during the regular operation of HVAC (Heating, Ventilation, and Air Conditioning) systems. These systems generate continuous sound and mechanical vibrations, which are typically wasted. The proposed method uses piezoelectric materials—such as PZT (Lead Zirconate Titanate) and PVDF (Polyvinylidene Fluoride)—strategically placed near high-noise zones like fans and air vents. These materials convert ambient acoustic vibrations into electrical energy through the piezoelectric effect. Although the harvested energy is low in magnitude, it is sufficient to power ultra-low-power devices such as wireless sensors, BLE beacons, and IoT modules. The system includes a power conditioning circuit to stabilize and store the energy in capacitors or micro-batteries. This enables battery-free operation, reducing maintenance and environmental impact. The solution is designed to be modular, scalable, and non-intrusive, ensuring it does not interfere with HVAC performance or airflow. Simulation tools like COMSOL and LTspice are used to optimize the design and validate performance. This approach supports smart building infrastructure and contributes to energy-efficient, self-powered systems.

Volume 10 Issue 9, September-2025

Pages : a470-a474