Development of High Grade Heat Storage for integration with Liquid Air Energy Storage

“能源储存是电力供应的一个重要方面，可以平衡能源需求和能源生产的变化。一种新的能量储存方法是使用冷冻空气来储存能量，直到需要的时候。液态空气储能（LAES）利用电力将空气冷却到零下196摄氏度，这是空气液化的温度。然后将液体储存在绝缘罐中，直到需要储存的能量。暴露于环境空气或工业过程产生的废热会导致冷冻空气迅速再气化，体积膨胀700倍；这种膨胀被用来驱动涡轮机并发电。LAES在供电安全方面为电网带来了可观的效益。其大规模、长时间的储能能力有助于平衡电网对发电和需求变化的影响，而间歇性与可再生能源（如风力发电）在能源组合中的贡献越来越大有关。与传统能源储存方案相比，LAES系统的一个主要优点是可以放置在工业园区内或现有发电机旁边，以便收集可用于产生气体的废热；从而提高了系统的效率。英国中小企业Highview Power Storage在大规模、长时间LAES储能方面处于世界领先地位。Highview的LAES系统目前正在大曼彻斯特的Pilsworth示范工厂投入使用，其设计使用现成的组件，在其他应用中得到验证，使用寿命长（30年），最大限度地降低了技术风险。它还使用了广泛可用的环保材料，如冷库中的砾石。示范工厂使用水基储热；虽然这代表了当前最先进的技术，但水有很大的局限性，Highview与布莱顿大学合作，正在寻求Innovate UK的支持，以开发一种替代的、创新的HGHS，为LAES过程效率做出重大贡献。该项目将优化LAES技术并加速商业化。具体来说，该项目将开发一种高级热存储解决方案（HGHS），使Highview的LAES系统能够从工艺本身或共同位置的贡献源中回收更高温度的废热。我们提出了一种创新的方法，需要开发一种替代传热流体（HTF），该流体与LAES的压力、传热、粘度、可燃性和毒性参数相关，并在实用、经济高效的HGHS解决方案中提供优化的RTE。”

"Energy storage is a vital aspect of electricity supply, balancing variation in energy demand and energy generation. A novel approach to energy storage uses refrigerated air to store energy until it is needed. Liquid Air Energy Storage (LAES) uses electricity to cool air to -196degC, the temperature at which it liquefies. The liquid is then stored in an insulated tank until there is a demand for the stored energy. Exposure to ambient air or waste heat from an industrial process causes rapid re-gasification of the refrigerated air and a 700-fold expansion in volume; this expansion is used to drive a turbine and generate electricity.LAES brings considerable benefits to the grid in terms of security of supply. Its large scale, long duration storage capability helps balance the grid against variation in generation and demand, with intermittency linked to the increasing contribution of renewable energy, such as wind power, in the energy generation mix. A major advantage over conventional energy storage options is that LAES systems can be placed within industrial estates or next to existing power generators in order to capture waste heat which can be used to create the gas; thus increasing the efficiency of the system.UK SME Highview Power Storage are world leaders in large scale, long duration LAES energy storage. Highview's LAES system, currently being commissioned in a demonstration plant in Pilsworth, Greater Manchester, has been designed to use off the shelf components, proven in other applications and with long lifespans (30 years), minimising technology risk. It also uses widely available and environmentally benign materials, such as gravel in the cold store. The demonstration plant uses a water based heat store; whilst this represents the current state-of-the-art, water has significant limitations and Highview, in partnership with the University of Brighton, are seeking Innovate UK support to develop an alternative, innovative HGHS that makes a significant contribution to LAES process efficiency. This project will optimise LAES technology and accelerate commercialisation.Specifically, the project will develop a High Grade Heat Store Solution (HGHS) that allows Highview's LAES system to recover higher temperature waste heat from the process itself or from contributory sources that are co-located. An innovative approach is proposed, entailing the development of an alternative heat transfer fluid (HTF) that correlates with the pressure, heat transfer, viscosity, flammability and toxicity parameters of LAES, and operates at temperatures that deliver optimized RTE within a practical, cost-effective HGHS solution."