Research progress on protective coatings against molten nitrate salts for thermal energy storage in concentrating solar power plants

Concentrating solar power(CSP) has garnered considerable global attention as a reliable means of generating bulk electricity, effectively addressing the intermittent nature of solar resources.The integration of molten salt technology for thermal energy storage(TES) has further contributed to the growth of CSP plants;however, the corrosive nature of molten salts poses challenges to the durability of container materials, necessitating innovative corrosion mitigation strategies.This review summarizes scientific advancements in high-temperature anticorrosion coatings for molten nitrate salts, highlighting the key challenges and future trends.It also explores various coating types, including metallic, ceramic, and carbon-based coatings, and compares different coating deposition methods.This review emphasizes the need for durable coatings that meet long-term performance requirements and regulatory limitations, with an emphasis on carbon-based coatings and emerging nanomaterials.A combination of multiple coatings is required to achieve desirable anticorrosion properties while addressing material compatibility and cost considerations.The overall goal is to advance the manufacturing, assembly, and performance of CSP systems for increased efficiency, reliability, and durability in various applications.

储热技术研究进展与展望

储热技术在解决可再生能源间歇性问题和提高能源利用效率等方面发挥着重要作用。本文针对储热技术的研究进展,分别从材料、装置、系统、政策干预等方面进行了综述。针对储热材料的性能提升,本文对构建复合型储热材料的配方研究、材料特性的微观模拟研究,及其相关的制备技术进行了总结。此外,随着高温熔融盐储热材料在光热发电系统中的广泛应用,本文对其产生的高温腐蚀行为与腐蚀防护技术进行了概述。储热装置方面,本文重点介绍了板式、填充床式和管壳式储热单元的强化传热方法。储热系统与应用方面,本文对基于相变储热和热管理、热化学储热、液态空气储能的应用研究进行了概述。最后,储热技术的发展离不开适当的政策干预,因此本文对不同国家针对储热技术制定的相关政策进行了报道。

基于相变材料的电动汽车电池热管理研究进展

锂离子电池作为电动车的动力核心,其性能和安全性直接关系到整车质量和行驶里程。电池的充放电性能和循环寿命受到温度的影响。本文简要介绍了电池发热机理和温度对电池性能的影响,主要综述了基于相变材料的电动汽车电池热管理技术的应用和发展。从材料角度,文中列举并分析了具有合适相变温度的PCM的潜热、导热系数等热物理性质,结论是:有机材料在满足潜热和相变温度的同时,还具备优异的成型性,而其较一般的导热性能和机械性能可通过添加改性剂来增强和优化;从装置角度,基于相变材料的热管理模块可以在被动模式下实现电芯间更均匀的温度分布、较小的温度波动和较低的能耗,而与传统的空冷、液冷方式结合后,混合热管理系统显示出更好的协同效果。目前,有关集成相变材料的电池组实验研究仍较少,但已有的计算流体动力学研究表明,借助相变材料,电池温度性能得到了优化和完善。最后分析了该新型热管理技术的发展瓶颈、可行的解决方案和未来研究方向。