1. 华中科技大学 能源与动力工程学院,湖北,武汉,430074
2. 中国船舶集团有限公司第七一九研究所,湖北,武汉,430064
[ "祝大龙(1998—),男,安徽阜阳人,硕士研究生,研究方向为太阳能吸热器热力性能数值仿真" ]
[ "张燕平(通信作者),女,教授,博士,E-mail:zyp2817@hust.edu.cn" ]
网络首发:2025-01-15,
纸质出版:2025
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祝大龙,陈宇轩,张燕平. 太阳能高温腔式吸热器在典型运行工况下的传热与应力分析动力工程学报, 2025, 45(1): 54-61 https://doi.
org/10.19805/j.cnki.jcspe.2025.230656
祝大龙,陈宇轩,张燕平. 太阳能高温腔式吸热器在典型运行工况下的传热与应力分析动力工程学报, 2025, 45(1): 54-61 https://doi. DOI: 10.19805/j.cnki.jcspe.2025.230656.
org/10.19805/j.cnki.jcspe.2025.230656 DOI:
为保证吸热器安全高效运行
以太阳能高温腔式吸热器为研究对象
建立热-力学耦合模型
对典型运行工况下吸热器的传热性能及力学性能进行数值模拟。结果表明:吸热器螺旋盘管表面的温度分布不均匀
最大温差达247.37 K
造成热应力分布不均;云层遮挡导致工质出口温度变化频繁
最大差值达185.70 K
影响系统的稳定性;在云层遮挡前后管壁温度和应力发生剧烈变化
缩短了吸热器的使用寿命;在启动和稳定状态下
质量流量对管道应力的影响结果相反;启动质量流量为0.02 kg/s时
工质出口温度较高
但最大应力接近其许用应力
安全裕度较低;在实际运行中
需结合具体情况
综合考虑效益与安全的平衡
确定最优启动质量流量。
In order to ensure the safe and efficient operation of the receiver
a coupled thermal-mechanical model was established for the solar high-temperature cavity receiver
and numerical simulations were conducted on the heat transfer performance and mechanical properties of the receiver under typical operating conditions. Results show that the temperature distribution on the surface of the receiver spiral coil of is uneven
with maximum temperature difference of 247.37 K
resulting in uneven distribution of thermal stress. The cloud cover causes frequent changes in the outlet temperature
with maximum difference of 185.70 K
affecting the stability of the system. The temperature and stress of the coil wall change drastically before and after cloud cover
which shortens the service life of the receiver. The effect of mass flow rate on coil stress is opposite between start-up and steady state. When the start-up mass flow rate is 0.02 kg/s
the outlet temperature of the working fluid is relatively high
while the maximum stress is close to the allowable stress
and the safety margin is low. In the actual operation
it is necessary to consider the balance of benefit and safety based on specific conditions
and then determine the optimal start-up mass flow rate.
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