EN平抑太阳能波动的高温吸热器锰基热化学涂层性能优化
平抑太阳能波动的高温吸热器锰基热化学涂层性能优化
- 热力发电 2026年55卷第1期 页码：113-121
- 作者机构：
1. 浙江大学能源高效清洁利用全国重点实验室
2. 中国石油新疆油田分公司采油工艺研究院
3. 杭州华源前线能源设备有限公司
4. 浙江大学青山湖能源研究基地
- 作者简介：
- 基金信息：内蒙古自治区“揭榜挂帅”项目（2024JBGS0026）;国家杰出青年基金项目（52325605）~~
DOI：10.19666/j.rlfd.202503041
中图分类号： TM615-
纸质出版：2026
- 稿件说明：
移动端阅览
[1]张添,刘静,孙田津,等.平抑太阳能波动的高温吸热器锰基热化学涂层性能优化[J].热力发电,2026,55(01):113-121.
[1]张添,刘静,孙田津,等.平抑太阳能波动的高温吸热器锰基热化学涂层性能优化[J].热力发电,2026,55(01):113-121. DOI： 10.19666/j.rlfd.202503041.
DOI：10.19666/j.rlfd.202503041.
摘要
塔式光热布雷顿循环发电系统的布置灵活，其吸热器工作温度较高，太阳能波动容易造成吸热器材料热疲劳或表面超温，亟需探索平抑吸热器温度波动的有效途径。开发了一种基于可逆氧化还原反应的锰基热化学热防护涂层，当太阳辐射增强且温度超过978℃时，涂层材料发生还原吸热反应，降低升温速率；当太阳辐射减弱且温度低于878℃时，发生氧化放热反应，减缓降温速率，进而平抑吸热器表面温度波动。研究表明：涂层材料与黏结剂的质量比为4:3时附着力可达国家标准的最高级，太阳光加权平均吸收率达到94.93%；在950℃恒温老化500 h、冷热交变老化100次循环以及氧化还原反应试验200次循环后，涂层加权平均吸收率仅分别衰减0.82百分点、0.98百分点和2.61百分点，且附着力保持在最高级；在±9.7 kW/m2的聚光辐射能流突变条件下，前100 s升温和降温速率分别降低59.66%和67.09%，升温和降温20℃所需的时间分别延长182.50%和438.60%。锰基热化学涂层表现出优秀的抗老化性能，并能有效平抑吸热器的温度波动，在塔式光热布雷顿循环系统中具有广阔的应用前景。
Abstract
The Brayton cycle-based tower solar thermal power system features a flexible layout and operates at high receiver temperatures. However
fluctuations in solar irradiance can lead to thermal fatigue of receiver materials or excessive surface temperatures
necessitating effective strategies to mitigate temperature fluctuations. This study develops a manganese-based thermochemical thermal protection coating utilizing a reversible redox reaction. When solar radiation intensifies and the temperature exceeds 978 ℃
the coating undergoes a reduction endothermic reaction
reducing the heating rate. Conversely
when solar radiation decreases and the temperature drops below 878 ℃
an oxidation exothermic reaction occurs
slowing the cooling rate
thereby stabilizing receiver surface temperature fluctuations. Experimental results indicate that when the mass ratio of the coating material to the binder is 4:3
the adhesion strength reaches the highest national standard level
and the solar weighed average absorptivity achieves 94.93%. After undergoing 500 hours of thermal aging at 950 ℃
100 cycles of thermal cycling
and 200 cycles of redox reaction tests
the coating's weighed average absorptivity decreased by only 0.82
0.98
and 2.61 percentage points
respectively
while maintaining the highest adhesion strength. Under a sudden change in concentrated solar radiation flux of ±9.7 kW/m²
the heating and cooling rates in the first 100 seconds were reduced by 59.66% and 67.09%
respectively. Additionally
the time required for a 20 ℃ increase and decrease was extended by 182.50% and 438.60%
respectively. The manganese-based thermochemical coating demonstrates excellent aging resistance and effectively suppresses absorber temperature fluctuations
making it highly promising for applications in Brayton cycle-based tower solar thermal power systems.
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references
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