原文信息
Radiative cooling for thermal management of ballastless track slab in high-speed railways
原文链接：
https://https://www.sciencedirect.com/science/article/pii/S0306261924025480
Highlights
(1) 总结无砟轨道板在高温条件下出现的热病害
(2) 总结目前典型辐射制冷材料的研究现状
(3) 总结了目前辐射制冷材料在无砟轨道板中的应用情况
(4) 对辐射制冷材料在无砟轨道板中的应用做出展望
Research gap
As a review article, this study aims to summarize the material properties, structural design and application methods of radiative cooling technology, and review its application status in ballastless track slab. By quantifying its thermal regulation and stress reduction effects, it provides an effective assessment of the feasibility and optimization potential of radiative cooling technology in high-speed railway system.
Abstract
With the rapid development of modern high-speed railways and the increasing frequency of extreme high-temperature weather, the impact of thermal issues such as cracking and upper arch gaps in ballastless track slabs has become increasingly prominent. Radiative cooling, as an environmentally friendly and energy-efficient passive cooling method, is anticipated to enhance the thermal conditions of ballastless track slabs and mitigate these problems. This article first reviews the principles of radiative cooling technology, then summarizes relevant studies on common radiative cooling materials and cooling structure designs. Common materials include selective emission materials (SiO2 and some metal oxides), reflective materials (TiO2 and BaSO4), and matrix materials (resins, polymers). Typical cooling structure designs include multilayer and metasurface structures. At last, this review summarized current research on the application of radiative cooling coatings in ballastless track slabs. The research shows that coatings can reduce track slabs surface temperatures by approximately 10 ºC, significantly lowering internal thermal stress and preventing the formation of cracks and gaps. It can be seen that radiative cooling has the potential to make a substantial contribution to the thermal management of ballastless track slabs. Future improvements in the durability of these coatings on ballastless track slabs and reductions in application costs will be essential for large-scale implementation. This review aims to provide a reference for the application and development of radiative cooling technology in the thermal management of ballastless track slabs, promoting the safe and reliable operation of high-speed railways.
Keywords
Radiative cooling
Ballastless track slab
Coating
Thermal management
Graphics
图 1. 图形摘要
图 2. （a）理想辐射制冷材料的光谱反射率/发射率
（b）无砟轨道表面的热平衡
图 3. 不同辐射制冷结构设计及其光谱发射率/反射率
图 4.FUDS下不同时间尺度SOP预测结果
作者简介
团队介绍：
本研究由中山大学土木工程学院的研究人员完成。
通信作者简介：
游田，中山大学土木工程学院副教授，带领团队从事基础设施智能温控技术，能源地下结构，光伏建筑一体化，可再生能源利用，建筑节能技术交叉领域的研究。
第一作者简介：
黄帅，中山大学土木工程学院在读硕士。
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