(SuperCO2) Phase transition of supercritical carbon dioxide (CO2) in transonic flows for shaping next-generation turbines

SuperCO 2项目概述和目标：超临界二氧化碳（sCO 2）循环是一种很有前途的发电技术，具有紧凑、高效、安全和环境友好的优点。然而，相变的sCO 2在临界点附近，一个显着的问题，影响长期的可操作性和可靠性的sCO 2系统，仍然没有完全理解，由于在超临界气-液相变伴随着热和质量传递过程中的复杂的流动行为。该项目旨在揭示跨音速流中sCO 2非平衡凝结的基本认识，并可能促进下一代清洁高效动力循环的发展。SuperCO 2项目的贡献：该项目将通过提出实验和数值研究，为理解跨音速流中sCO 2非平衡凝结做出贡献。该模型能够精确地确定在sCO 2相变过程中具有传热和传质的纳米液滴的形成和生长。所提出的项目提供了对临界点附近sCO 2相变的深入理解，这不仅将减少热力学和气动损失，而且还将提高涡轮机部件的可靠性和寿命，超越了对当前sCO 2技术的最新理解。因此，sCO 2项目显示出突破性的雄心，可能促进新一代动力循环的发展。预计将有4篇以上的论文发表在著名的同行评审期刊上。由于sCO 2循环的广泛应用，这一独特的项目不仅有助于欧洲电力工业，包括新发电技术的研发，而且将促进相关领域的基础研究水平，如超临界流体流动和冷凝动力学。

Overview and aims of the SuperCO2 project: The supercritical carbon dioxide (sCO2) cycle is a promising power generation technology with the advantages of compactness, efficiency, high safety and environmental friendliness. However, the phase transition of sCO2 near the critical point, one of the salient issues affecting long term operability and reliability of sCO2 systems, is still not fully understood due to the complicated flow behaviour in supercritical-gas-liquid phase transitions accompanied by heat and mass transfer processes. The proposed project aims to reveal the fundamental understanding of the nonequilibrium condensation of sCO2 in transonic flows and potentially promote the development of the next-generation clean, efficient power cycle.Contribution of SuperCO2 project: The proposed project will contribute to the understanding of the nonequilibrium condensation of sCO2 in transonic flows by proposing experimental and numerical studies. This model is able to precisely determine the formation and growth of nanodroplets with heat and mass transfer during the sCO2 phase transition. The proposed project providing a deep understanding of the phase transition of the sCO2 near the critical point, which will not only reduce thermodynamic and aerodynamic losses but also improve the reliability and life of turbine components, goes beyond the state-of-the-art of understanding of the current sCO2 technology. Thus, the sCO2 project shows a breakthrough ambition to potentially promote the development of a new generation of power cycles. More than 4 papers are expected to be published in prestigious peer-reviewed journals. Duo to wide applications of the sCO2 cycles, this unique project will not only be helpful to the European power industry, including the R&D of new power generation technology but also will promote the fundamental research level in related areas, such as supercritical fluid flow and condensation dynamics.