Gravitricity Ltd, Development of Hybrid Mechanical and Compressed Air Energy Storage System

这是一项开发新型技术的提议，该技术基于结合使用重力和压缩空气进行并网电能存储，其规模为100千瓦至50兆瓦峰值功率和每周期250千瓦时至10兆瓦时能量。这将填补小规模相对短寿命的存储设备（如飞轮和电池）与固有的大规模系统（如抽水蓄能）之间的技术差距。它还具有快速响应等主要优点（<2s至满功率）和高能效（>90%的往返效率），无循环恶化（性能不受存储周期数或部分装载的影响）。该项目将包括开发技术各个方面的工程工作（包括垂直钻孔的方法，深度达1公里，直径达5米），同时进行商业工作，以确保技术产品能够满足电网储能的新兴需求。该项目将在3-5年内完成概念验证原型部署的全部成本计划。

This is a proposal to develop a novel technology based on a combination of using gravity and compressed airfor grid-connected electrical energy storage at a scale from 100kW to 50MW peak power and from 250kWh to10MWh energy per cycle. This will fill a technology gap between small-scale relatively short-life storage deviceslike flywheels and batteries, and inherently large scale systems like pumped storage. It also has majoradvantages including rapid response (<2s to full power) and high energy efficiency (>90% round-trip efficiency)with no cyclic deterioration (performance is not affected by number of storage cycles or by part-loading).The project will include engineering work to develop all aspects of the technology (including a methodology tovertically drill holes up to a km deep and 5m in diameter) alongside parallel commercial work to ensure thetechnical offering will suit the emerging demand for energy storage on power grids. The project will output fullycosted plans for a proof-of-concept prototype deployment to be deployed within 3-5 years.