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

这是一项基于利用重力和压缩空气相结合的新技术，用于并网储能，峰值功率从100kW到50MW，每循环能量从250kWh到10mwh。这将填补小规模的、寿命相对较短的储能设备（如飞轮和电池）与固有的大规模系统（如抽水蓄能）之间的技术空白。它还具有快速响应（满功率<2s）和高能效（>90%往返效率），没有循环劣化（性能不受存储循环次数或部分加载的影响）。该项目将包括开发该技术各个方面的工程工作（包括垂直钻孔达1公里深、直径5米的方法），以及平行的商业工作，以确保该技术能够满足电网对储能的新兴需求。该项目将在3-5年内为概念验证原型部署提供完整的成本计划。

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.