Commission method of the primary helium circulator of HTGR under variable resistance condition
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摘要: 高温气冷堆主氦风机调试期间，由于一回路阻力低于设计工况，因而主氦风机无法完成全转速范围性能测试。基于主氦风机的理论特性与相似原理开发主氦风机不同阻力工况调试参数的推算方法。结合主氦风机单体试验工况点，准确推算主氦风机冷态与热态性能试验的工况点参数，并指导完成高温气冷堆主氦风机全转速、满功率性能测试。通过对主氦风机调试与出厂试验结果的对比分析，验证本推算方法的可行性，并给出空气介质与氦气介质工况转换的修正因子。通过主氦风机调试与运行数据的对比分析，可以看出本文提供的主氦风机调试工况具有足够的包络性，能够覆盖高温气冷堆运行期间主氦风机的所有运行工况，证明了本文提供的变阻力工况主氦风机调试方法满足高温气冷堆主氦风机性能验证需求，可用于指导后续高温气冷堆的主氦风机调试工作。Abstract: During the commissioning of the primary helium circulator of the high-temperature gas-cooled reactor (HTGR), it could not complete the performance test of the full speed range, because the resistance of the primary loop was lower than the design condition. Based on the theoretical characteristics of the primary helium circulator and similar principles, a method for calculating the commission parameters of the primary helium circulator under different resistance conditions was developed. Combined with the monomeric test operating points of the primary helium circulator, the method was used to accurately calculated the operating point parameters of the cold and hot performance tests of the primary helium circulator, and guide the completion of the full speed and full power performance tests of the primary helium circulator in HTGR. By comparing and analyzing the commission and factory test results of the primary helium circulator, the feasibility of this calculation method is verified, and correction factors for the conversion of working conditions between air medium and helium medium is provided. Through comparing and analyzing the commission and operation data of the primary helium circulator, it can be seen that the commission conditions provided in this article have sufficient enveloping ability, which can cover all operating conditions of the primary helium circulator during the operation of HTGR. This proves that the variable resistance condition commission method of the primary helium circulator meets the performance verification requirements of HTGR, and it can be used to guide the primary helium circulator commission of subsequent HTGRs.
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图 2 离心风机工作特性与管网阻力关系示意图
Figure 2. Relationship between the characteristics of centrifugal fans and the resistance of pipe network
图 3 离心叶轮工质流动示意图
Figure 3. Schematic diagram of working medium flow in centrifugal impeller
图 4 离心叶轮出口速度三角形示意图
Figure 4. Schematic diagram of centrifugal impeller outlet velocity triangle
图 5 主氦风机冷态试验运行点在其性能曲线上的分布
Figure 5. Distribution of the cold test operation points of the primary helium circulator on its performance curve
图 6 主氦风机热态试验运行点在其性能曲线上的分布
Figure 6. Distribution of thermal test operation points of the primary helium circulator on its performance curve
表 1 主氦风机的主要参数[3]
Table 1. Main parameters of primary helium circulator
working fluid pressure/MPa flow rate/(kg/s) pressure rise/kPa rated speed/(r/min) rated electrical power/kW helium 7 96 200 4000 4500 
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表 2 主氦风机试验介质压力换算
Table 2. Conversion of test pressure of primary helium circulator
test working fluid temperature/℃ pressure/MPa power*/kW density/(kg/m3) monomeric test air 19.3 0.10 1019.1 1.19 cold test air 25.0 0.45 4500.0 5.27 hot test helium 250.0 5.73 4500.0 5.27 *: $ {n}_{\max} $ is equal to 4000 r/min
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表 3 不同工况下主氦风机运行情况
Table 3. Operation of primary helium circulator under different working conditions
work condition speed/(r/min) current/A voltage/V power/kW pressure rise/kPa flow rate/(kg/s) pressure/MPa inlet temperature/℃ ① 3600 523.7 5614 4218 122.2 127.3 6.9 239.9 ② 4000 516 6147 4648 145.2 116.0 5.31 235.9 ③ 3800 580 6000 4500 200 96 7.0 243 ①: primary helium circulator operation at 200 MW
②: the hot function test of primary helium circulator
③: rated parameters and some design limits for primary helium circulator
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