西安交通大学能源与动力工程学院,西安,710049
: 2024-03-24。作者简介: 李占英(1984—),女,硕士生
王江峰(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(51976147)。
网络首发:2024-12-10,
纸质出版:2024
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李占英, 王江峰, 娄聚伟, 等. 印刷电路板换热器在超临界二氧化碳布雷顿循环系统中的动态特性研究[J]. 西安交通大学学报, 2024,58(12):34-44.
LI Zhanying, WANG Jiangfeng, LOU Juwei, et al. Dynamic Characteristic Analysis of Printed Circuit Heat Exchangers in Supercritical Carbon Dioxide Brayton Cycle Systems[J]. 2024, 58(12): 34-44.
李占英, 王江峰, 娄聚伟, 等. 印刷电路板换热器在超临界二氧化碳布雷顿循环系统中的动态特性研究[J]. 西安交通大学学报, 2024,58(12):34-44. DOI: 10.7652/xjtuxb202412004.
LI Zhanying, WANG Jiangfeng, LOU Juwei, et al. Dynamic Characteristic Analysis of Printed Circuit Heat Exchangers in Supercritical Carbon Dioxide Brayton Cycle Systems[J]. 2024, 58(12): 34-44. DOI: 10.7652/xjtuxb202412004.
为了制定有效的系统控制策略
保证系统安全稳定运行
针对印刷电路板换热器(PCHE)在核能超临界二氧化碳布雷顿循环中作为回热器的应用进行了研究
分析了PCHE在不同扰动条件下的性能表现。采用分段设计方法
构建了一维稳态设计模型
对PCHE进行了稳态传热设计及分析。以稳态设计作为初始条件
利用Simulink软件
建立了PCHE的动态仿真模型
模拟了流体入口温度或流量发生变化时PCHE的动态响应。结果表明:回热器冷侧入口温度发生变化时
热侧出口温度变化明显
出现了约12 K波动
且热侧出口温度响应相对较快
而热侧入口温度变化对热侧出口温度影响微小
仅波动1 K左右; 流量变化对回热器效能影响较大
冷侧流量减小或热侧流量增加使得回热器效能降低了6%左右
较大的回热器热惯性使得两侧出口温度对流量的响应较慢
出现了一定的延迟。研究结果可为系统调节与控制提供可靠的指导。
In order to develop an effective control strategy for the system and ensure its safe and stable operation
the application of the printed circuit heat exchanger(PCHE)is investigated as a regenerator in the nuclear supercritical carbon dioxide Brayton cycle
with an analysis of the performance of PCHE under different disturbance conditions. A one-dimensional steady-state design model for PCHE is constructed using the segmented design method to analyze the steady-state heat transfer characteristics of PCHE. Using the steady-state design as the initial condition
a dynamic simulation model of PCHE is established using Simulink software to simulate the transient response of PCHE to changes in fluid inlet temperature or flow rate. The results show that when the inlet temperature on the cold side changes
a significant change is observed in the outlet temperature on the hot side
with a fluctuation of about 12 K
and the temperature response of the hot side outlet temperature is relatively fast. Conversely
the inlet temperature of the hot side has a minor effect on the outlet temperature of the hot side
with a fluctuation of only about 1 K. Furthermore
variations in flow rate substantially impact the efficiency of the regenerator. A decrease in the cold side flow rate or an increase in the hot side flow rate leads to a reduction in regenerator efficiency by about 6%. Additionally
the larger thermal inertia of the regenerator results in a delayed response of the temperature at both sides of the outlet to the flow rate. These results can offer reliable guidance for system regulation and control.
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