Thermal-Hydraulic Performance Analysis of Horizontal Spiral Tube Steam Generator for European Lead-Cooled Fast Reactor
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摘要: 以欧洲铅冷堆（ELSY）水平螺旋管式蒸汽发生器（HST-SG）为研究对象，结合其结构参数和运行参数，选取了合适的传热阻力模型开发了一维稳态热工水力计算程序，采用该程序首先对ELSY HST-SG进行校核计算，以验证程序计算的准确性，再结合计算结果，对ELSY HST-SG热工水力性能进行详细分析，并针对不同运行参数开展对比分析研究。分析结果表明，ELSY HST-SG各项参数选择合理，热工水力性能优良，结构紧凑。因此，该程序可用于ELSY HST-SG的设计开发和性能分析。Abstract: Taking the horizontal spiral tube steam generator (HST-SG) of European lead-cooled system (ELSY) as the research object, combined with its structural and operating parameters, this paper selects an appropriate heat transfer resistance model and develops a one-dimensional steady-state thermal hydraulic calculation program. Firstly, the program is used to check and calculate ELSY HST-SG to verify the accuracy of the program calculation. Then, combined with the calculation results, the thermal and hydraulic performance of ELSY HST-SG is analyzed in detail, and the comparative analysis and research is carried out for different operation parameters. The analysis results show that the selection of various parameters of ELSY HST-SG is reasonable, the thermal and hydraulic performance is excellent, and the purpose of compact structure is achieved. Therefore, this program can be used for design development and performance analysis of ELSY HST-SG.
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Key words:
- Horizontal spiral tube /
- Steam generator /
- Lead-cooled fast reactor /
- Thermal hydraulics
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图 1 SG-PP一体化设计示意图[8]
Figure 1. Schematic Diagram of Integrated Design of Main Pump and SG
图 2 传热管微元传热示意图
T1,j、T2,j分别为节点j处一、二次侧流体温度；T1,j+1、T2,j+1分别为节点j+1处一、二次侧流体温度
Figure 2. Schematic Diagram of Heat Transfer in Tube Microelement
图 3 水平螺旋管示意图
R为质点轨迹半径；θ为微元所在位置弧度角；dl为微元传热管管长，dl=[(Rdθ)2+(dR)2]0.5
Figure 3. Schematic Diagram of Horizontal Spiral Tube
图 6 ELSY HST-SG温度沿管长分布
Figure 6. ELSY HST-SG Temperature Distribution along the Tube Length.
图 7 管束各环节传热系数沿管长分布
Figure 7. Distribution of Heat Transfer Coefficient of Each Link of Tube Bundle along Tube Length
图 8 传热管热流密度与流体传热温差沿管长分布
Figure 8. Distribution of Heat Flux Density and Fluid Heat Transfer Temperature Difference along Heat Transfer Tube Length
图 9 一、二次侧介质流速沿管长分布
Figure 9. Velocity Distribution of the Media on the Primary and Secondary Sides along Tube Length
图 11 不同蒸汽压力下温度分布曲线
Figure 11. Temperature Distribution Under Different Steam Pressures
图 12 不同给水温度情况下二次侧流体温度分布
Figure 12. Temperature Distribution of Secondary Side Fluid under Different Feed Water Temperatures
图 13 不同堵管率时的功率和管内阻力对比
Figure 13. Comparison of Power and in-tube Resistance at Different Tube Blocking Rates
表 1 ELSY 堆主热传输系统参数[8]
Table 1. Main Parameters of ELSY Heat Transfer System[8]
参数 参数值 参数 参数值 反应堆
电功率/ MW600 SG模块数量 8 单台SG
热功率/MW175 蒸汽压力/MPa 18 铅进口温度/℃ 480.0 给水温度/℃ 335 铅出口温度/℃ 400.0 蒸汽出口温度/℃ 450 
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表 2 SG主要结构参数[8]
Table 2. Main Structural Parameterrs of SG
参数 参数值 参数 参数值 SG内筒外径/mm 1240 传热管长度/m 55 SG外筒内径/mm 2420 每层的传热管
数量2 螺旋管束区高度/mm 2620 传热管外径、壁厚/mm 22.22、2.5 传热管数量 219 轴向、径向间距/mm 24、24
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表 4 程序校核计算结果
Table 4. Program Check and Calculation Results
参数 功率/
MW铅进口
温度/℃铅出口
温度/℃给水温
度/℃蒸汽出口
温度/℃管长/m 设计
参数175.00 480.0 400.00 335.0 450.0 55.0 校核
计算179.68 480.0 397.88 335.0 462.5 55.0 误差 2.67% — −0.53% — 2.78% — “—”表示无误差
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表 5 不同压力下额定功率设计参数对比
Table 5. Comparison of Design Parameters of Rated Power under Different Pressures
压力/MPa 14 16 18 20 给水温度/℃ 335 335 335 335 蒸汽出口温度/℃ 463.3 461.5 459.8 459.1 功率/ MW 186.9 183.0 179.1 174.7 蒸汽流速/(m·s−1) 45.57 38.66 33.12 28.79 管内阻力/ kPa 1392.1 1169.6 965.5 768.2
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表 6 不同给水温度情况下参数变化
Table 6. Parameter Changes under Different Feed Water Temperatures
给水温度/℃ 330 335 345 355 蒸汽压力/ MPa 18 18 18 18 蒸汽出口温度/℃ 458.3 459.8 463.0 466.4 两相区长度/m 20.42 20.49 20.44 20.34 沿程压降/kPa 951.5 965.5 1000.0 1040.5 功率/MW 182.28 179.15 172.38 164.08
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