Precision design and development of mechanical harvesters of energy
Sustainable Energy Harvest
Wind energy harvesting technologies have evolved significantly, with two main generator systems leading the way in onshore and offshore applications. The doubly fed induction generator (DFIG) system, utilizing partial-scale converters, is widely popular for onshore power generation due to its compatibility and efficiency. For offshore and multi-mega-scale wind power generation, the permanent magnet synchronous generator (PMSG) system with full-scale converters is gaining prominence. The PMSG technology offers superior performance, reliability, and extended reactive power capability, making it particularly attractive for offshore wind farms despite its higher cost.
Gravity energy storage (GES) systems represent an innovative approach to storing electricity as potential energy. These systems lift solid weights against Earth's gravity when surplus electricity is available and lower them to generate electricity during high demand periods. Lifted weight storage (LWS) configurations, which use pulley systems in tandem with motor-generators, offer several advantages including extended service life of 40-60 years, high full-cycle efficiency of about 85%, and fast response times. GES systems can provide various grid services such as load shifting, renewable energy integration, black start capability, and frequency regulation. Recent advancements in GES technology include the use of unstabilized compressed earth blocks for weights, which have a significantly lower carbon footprint compared to concrete-based alternatives, and the adoption of green steel for load-bearing structures to further minimize environmental impact
Precision Pursuit Robotics has developed and filed a patent for a groundbreaking energy harvesting system that ingeniously combines a vertical wind turbine with a gravity energy harvester. This innovative design leverages the principles of vortex-induced vibration and resonance to generate power even in the lightest of breezes. By carefully tuning the system's natural frequency, we've created a device that can enter resonance at exceptionally low wind speeds, maximizing energy capture where traditional turbines would remain idle. The vertical structure oscillates perpendicular to the wind direction, driven by the regular shedding of vortices on either side. This motion is then converted into electrical energy through a sophisticated mechanism incorporating gravity-based energy storage, allowing for continuous power output even when wind conditions fluctuate.
Precision Pursuit Robotics' patented resonance-shifting module further enhances the system's versatility, enabling it to adapt to a wide range of wind speeds and maintain optimal performance.
