Liquid-Solid Nanogenerator With Turbulators for Wave Power Density
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Solution Overview
Problem
Existing power generation technologies for marine applications face inefficiencies in converting low-frequency irregular marine energy, environmental pollution risks, and limitations in output power and durability of existing friction nano power generation devices.
Innovation Solution
A turbulence-enhanced liquid-solid friction nano power generation device with parallel power generation cores, utilizing PTFE tubes, conductive electrodes, and internal turbulators to increase friction area and generate alternating current through liquid-solid interactions, driven by wave motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electromagnetic induction generators are used to collect wave energy, then high-frequency mechanical energy can be collected effectively, but the conversion efficiency for low-frequency irregular marine energy is low and the device complexity increases due to multiple energy conversion processes
Solution Approach 1:
The patent replaces electromagnetic induction with direct friction-based nanogeneration. The liquid-solid friction between the oscillating tube and surrounding liquid directly generates electrical energy through triboelectric effects, eliminating the need for electromagnetic conversion mechanisms and intermediate hydraulic or pneumatic systems.
Solution Approach 2:
The patent utilizes the surrounding liquid (hydraulic medium) directly as both the energy source and the friction partner. The tube oscillates within the liquid, creating liquid-solid friction that generates electricity, thereby integrating the hydraulic environment into the power generation mechanism itself rather than requiring separate conversion systems.
2Duration of action of moving object
If storage batteries are used for power supply in marine equipment, then continuous power can be provided, but the service life is limited and manual replacement is required frequently
Solution Approach 1:
The power generation device is deployed in the marine environment where it autonomously harvests energy from water waves and currents. The device self-powered operation eliminates the need for manual battery replacement, as it continuously generates electricity from the surrounding environment without requiring human intervention for maintenance.
3Productivity
If solar panels are used for power supply in marine environment, then renewable energy can be harnessed, but the high salinity causes material corrosion and power generation efficiency decreases
Solution Approach 1:
The patent embraces the hydraulic environment by using the surrounding liquid as the friction partner for power generation. Instead of protecting against the liquid environment, the device utilizes it directly, eliminating corrosion issues while harnessing the kinetic energy of water motion through friction-based nanogeneration.
4Power
If friction nano power generation devices are used to increase output power, then more parallel power generation cores are needed, but the device size becomes excessively large
Solution Approach 1:
The patent transitions from solid-solid friction to liquid-solid friction, utilizing the third dimension of fluid motion. The liquid medium provides omnidirectional friction contact as the tube oscillates, effectively increasing the friction contact area without proportionally increasing device volume, thereby achieving higher power density.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances power generation efficiency per unit volume, reduces environmental impact, and provides continuous power supply without manual maintenance, addressing the limitations of traditional systems.
Implementation Method 1
the friction liquid inside the outer tube rubs against an inner wall of the outer tube and an outer membrane of each of the internal turbulators to generate charges
Implementation Method 2
rubs against... to generate charges
Implementation Method 3
the charges are transferred based on the external friction electrodes and the internal friction electrodes, and an alternating current is generated
Data Source
AI summary
A turbulence-enhanced liquid-solid friction nano power generation device is provided, including multiple power generation cores connected in parallel. Each of the power generation cores includes an outer tube, a friction liquid, external friction electrodes, internal turbulators and internal friction electrodes. When the power generation cores undergo a swing motion, the friction liquid inside the outer tube rubs against an inner wall of the outer tube and an outer membrane of each of the internal turbulators to generate charges; and the charges are transferred based on the external friction electrodes and the internal friction electrodes, and an alternating current is generated and is led out through an external wire.