SUCCES (Stored Up-valued Concentrated Cold Energy System)

SUCCES（储存升值集中冷能系统）

• 批准号: EP/W027712/1
• 负责人: Angad Panesar
• 金额: $ 62.73万
• 依托单位: University of Brighton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW027712%2F1
• 关键词: SUCCES; Stored; Up; valued; Concentrated

Energy storage is an essential technology for balancing the differences in supply and demand in a sustainable power network reliant on intermittent renewable generation. Energy can be stored as electricity, as heat and chemically in a sustainable fuel and at different temporal and size scales. Short time variations in the power grid can be effectively managed using batteries but the battery technologies are too expensive for servicing the bulk long term storage requirements to balance variations in demand between seasons and extended periods of low renewable generation. Technologies with a slower response, lower round trip efficiency but lower capital base are preferred for these applications. Liquid Air Energy Storage (LAES) is a long duration storage technology being developed by Highview Power. Energy is stored thermally in three ways; as cold in liquid air and in a backed bed regenerator cold store and as heat in a molten salt hot store. An air liquefier is used to charge the LARS device. LAES has a sweet spot at large (>50MW) scale as plant efficiency increases and relative cost reduces with scale for this technology. But what would happen if a LAES plant could be efficiently deployed at smaller (<50MW) scale? The technology could then be integrated with other aspects of the energy network that require cooling at cryogenic temperatures such as the long term storage of bio methane and green hydrogen. In this project, we will investigate the integration of a small to mid scale LAES plant with the liquefaction of locally produced bio methane from waste, such as agriculture, managed grass land (such as parks and sports fields) and sewerage. Similarly, hydrogen produced by small to mid size electrolysers connected to local renewable generators requires a storage solution. We propose cold, pressurised storage of hydrogen at 80-90K which lowers the pressure required to store the gas (for an equivalent energy density) by a factor of 2 to 3 and avoids the high energy cost of cryogenic storage at 20K.Integration of LAES with methane and hydrogen storage opens up new revenue steams and shifts the economics to favour smaller plant serving local communities such as large farms, local authorities and water companies managing sewage waste. We propose a local rather than central solution as (a) the feedstocks for bio-methane production have a low energy density to local production and storage avoids transportation inefficiencies (b) Similarly local production and consumption of hydrogen avoids the need to move cold pressurised gas to bulk storage facilities and then to consumers and (c) imbedding the core electrical energy storage of the LAES plant closer to the end user has benefits in reducing the load on the transmission network.

储能是平衡依赖间歇性可再生能源发电的可持续电力网络中供需差异的重要技术。能量可以以电力、热量和化学形式存储在可持续燃料中，并以不同的时间和规模进行存储。使用电池可以有效地管理电网的短时变化，但电池技术对于满足大量长期存储需求以平衡季节之间的需求变化和长期可再生能源发电量低的情况而言过于昂贵。这些应用优选响应速度较慢、往返效率较低但资本基础较低的技术。液体空气储能（LAES）是 Highview Power 正在开发的一种长期存储技术。能量以三种方式进行热储存：液态空气和背床再生器冷库中的冷量以及熔盐热库中的热量。空气液化器用于为 LARS 设备充电。 LAES 在大型（>50MW）规模上具有最佳优势，因为随着该技术规模的扩大，工厂效率会提高，相对成本也会降低。但是，如果 LAES 发电厂能够以较小的规模（<50MW）有效部署，会发生什么？然后，该技术可以与需要低温冷却的能源网络的其他方面集成，例如生物甲烷和绿色氢的长期储存。在该项目中，我们将研究将中小型 LAES 工厂与当地废物（如农业、管理草地（如公园和运动场）和污水处理设施中产生的生物甲烷液化）相结合。同样，连接到当地可再生发电机的中小型电解槽生产的氢气也需要存储解决方案。我们建议在 80-90K 温度下冷加压储存氢气，这可将储存气体（同等能量密度）所需的压力降低 2 至 3 倍，并避免 20K 低温储存的高能源成本。LAES 与甲烷和氢气储存的集成开辟了新的收入来源，并使经济转向有利于为当地社区（例如大型农场、地方当局和管理污水废物的水公司）提供服务的小型工厂。我们提出了一种本地而不是集中的解决方案，因为（a）生物甲烷生产原料的能量密度较低，本地生产和储存避免了运输效率低下（b）类似地，本地生产和氢气消耗避免了将冷加压气体转移到大容量储存设施，然后转移到消费者的需要；（c）将LAES工厂的核心电能储存嵌入到更靠近最终用户的地方有利于减少传输网络的负载。