Abstract Due to the increasing amount of volatile energy in Europe’s electricity system, the existing storage technologies and capacities are pushed to their limits. Therefore, new concepts like the sensible Fluidization Based Particle Thermal Energy Storage (FP-TES) can be a viable option. The FP-TES is working with bulk material as storage medium, which provides proven benefits like cost efficiency and low thermal losses. Moreover, the greatest advantage of the FP-TES compared to other particle based storage systems is the substitution of mechanical transport devices by an advanced fluidization technology. To prove and further develop this concept of particle transport, numerical simulations are performed. Consequently, an optimized geometry for a cold test rig, working with 800 kg quartz sand, is developed and its behaviour as well as particle mass flow and pressure drops are predicted. Furthermore, the results of experimental investigations performed with the test rig are compared to the numerical simulations. Both the simulation and the experiment show that controlled stable particle mass flow can be achieved by the developed advanced fluidization technology. Finally, a basic layout of an exemplary application is designed and the energetic efficiency is estimated.

中文翻译：

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基于流化的新型粒子热能储存 (FP-TES) 流动行为的数值研究

摘要 由于欧洲电力系统中不稳定能源的数量不断增加，现有的储能技术和容量已达到极限。因此，像基于显着流化的粒子热能储存 (FP-TES) 这样的新概念可能是一个可行的选择。FP-TES 使用散装材料作为存储介质，具有成本效益和低热损失等公认优势。此外，与其他基于颗粒的存储系统相比，FP-TES 的最大优势是用先进的流化技术替代了机械传输设备。为了证明和进一步发展这种粒子传输的概念，进行了数值模拟。因此，针对冷试验台的优化几何形状，使用 800 kg 石英砂，开发并预测其行为以及粒子质量流量和压降。此外，将使用测试装置进行的实验研究的结果与数值模拟进行了比较。模拟和实验都表明，开发的先进流化技术可以实现受控稳定的颗粒质量流量。最后，设计了示例应用的基本布局并估算了能量效率。