High-performance ultra-low-carbon Geopolymer heat Battery for thermochemical energy storage in net-zero buildings (GeoBattery)

目前，空间供暖占英国能源消耗的25%和碳排放的17%。废热的有效回收、储存和再利用，以及可再生能源，在建筑物供暖脱碳中发挥着不可或缺的作用。热化学储能材料是相变储能材料和显热储能材料中体积能量密度最高的材料。然而，热化学储能材料的设计和制造仍然面临着成本高，可持续性低，加热功率有限的挑战。对控制循环储能性能和结构稳定性的材料的性质也缺乏基本的理解。这些都带来了重大的挑战，优化和实施的热化学储能技术的国内应用。该项目采用土木工程材料的新研究方法，以解决开发热化学储能材料所面临的这些长期挑战。通用高性能热电池材料将由可持续的低成本土木工程材料地质聚合物开发。将通过绿色合成路线开发具有增强的传热传质性能和热化学储能能力的轻质地质聚合物复合材料。第一个结构稳定性评估模型预测的热电池材料的使用循环寿命将提出从扩展的无机多孔建筑材料的化学-机械盐损伤模型。本计画所发展之材料制造技术及对降解机制之基本了解，将可应用于多用途之“盐基”TCES复合材料。该项目的成果将大大提高热能储存技术的可持续性和弹性，以实现现有和新建建筑物的供暖脱碳。

Space heating currently accounts for 25% of the UK's energy consumption and 17% of its carbon emissions. The effective and efficient recovery, storage, and reuse of waste heat, together with renewable energy, play indispensable roles in decarbonisation of heating in buildings. The thermochemical energy storage materials possess the highest volumetric energy density comparing to phase change and sensible heat storage materials. However, the design and manufacture of thermochemical energy storage materials are still facing the challenges of high cost, low sustainability, and limited heating power. There also lacks fundamental understandings of the properties of materials that control the cyclic energy storage performances and structural stabilities. These have brought significant challenges to optimisation and implementation of the thermochemical energy storage techniques for domestic application. This project adopts novel research approaches for civil engineering materials to tackle these standing challenges faced by developing thermochemical energy storage materials. Versatile high-performance heat battery materials will be developed from sustainable low-cost civil engineering material geopolymers. Lightweight geopolymer composite materials with enhanced heat and mass transport properties and thermochemical energy storage capacity will be developed through green synthesis routes. The first structural stability assessment model for predicting the service cycle life of heat battery materials will be proposed from the extended chemo-mechanical salt damage model for inorganic porous building materials. The materials fabrication technology and fundamental understanding of the degradation mechanism developed in this project will be transferable to versatile "salt-in-matrix" TCES composites. The outcomes developed from this project will drastically improve the sustainability and resilience of thermal energy storage technologies, for decarbonisation of heating in existing and new-built buildings.