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High wall-plug efficiency 808-nm laser diodes with a power up to 30.1 W 被引量:4
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作者 Zhanqiang Ren Qingmin Li +1 位作者 Bo Li Kechang Song 《Journal of Semiconductors》 EI CAS CSCD 2020年第3期59-61,共3页
A very highly efficient InGaAlAs/AlGaAs quantum-well structure was designed for 808 nm emission,and laser diode chips 390-μm-wide aperture and 2-mm-long cavity length were fabricated.Special pretreatment and passivat... A very highly efficient InGaAlAs/AlGaAs quantum-well structure was designed for 808 nm emission,and laser diode chips 390-μm-wide aperture and 2-mm-long cavity length were fabricated.Special pretreatment and passivation for the chip facets were performed to achieve improved reliability performance.The laser chips were p-side-down mounted on the AlN submount,and then tested at continuous wave(CW)operation with the heat-sink temperature setting to 25℃using a thermoelectric cooler(TEC).As high as 60.5%of the wall-plug efficiency(WPE)was achieved at the injection current of 11 A.The maximum output power of 30.1 W was obtained at 29.5 A when the TEC temperature was set to 12°C.Accelerated life-time test showed that the laser diodes had lifetimes of over 62111 h operating at rated power of 10 W. 展开更多
关键词 high power semiconductor lasers high wall-plug efficiency COMD
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Exact solution to peristaltic transport of power-law fluid in asymmetric channel with compliant walls
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作者 T.HAYAT M.JAVED 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2010年第10期1231-1240,共10页
Effects of compliant wall properties on the peristaltic flow of a non-Newtonian fluid in an asymmetric channel are investigated.The rheological characteristics are characterized by the constitutive equations of a powe... Effects of compliant wall properties on the peristaltic flow of a non-Newtonian fluid in an asymmetric channel are investigated.The rheological characteristics are characterized by the constitutive equations of a power-law fluid.Long wavelength and low Reynolds number approximations are adopted in the presentation of mathematical developments.Exact solutions are established for the stream function and velocity.The streamlines pattern and trapping are given due attention.Salient features of the key parameters entering into the present flow are displayed and important conclusions are pointed out. 展开更多
关键词 peristaltic flow power-law fluid compliant walls
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Finite element modeling of power spinning of thin-walled shell with hoop inner rib 被引量:15
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作者 白倩 杨合 詹梅 《中国有色金属学会会刊:英文版》 EI CSCD 2008年第1期6-13,共8页
A 3D elasto-plastic finite element(FE)model of power spinning of thin-walled aluminum alloy shell with hoop inner rib was established under software ABAQUS.Key technologies were dealt with reasonably.The reliability o... A 3D elasto-plastic finite element(FE)model of power spinning of thin-walled aluminum alloy shell with hoop inner rib was established under software ABAQUS.Key technologies were dealt with reasonably.The reliability of the FE model was verified theoretically and experimentally.The forming process was simulated and studied.The distribution of the thickness and stress,and the variations of spinning force were obtained.The workpiece springback was analyzed with ABAQUS/Standard.The results show that the FE model considering elastic deformation can not only be used to analyze the workpiece springback in the complex spinning process,but also serve as a significant guide to study the local deformation mechanism and choose the reasonable parameters. 展开更多
关键词 铝合金 有限元素模型化 稀有金属 处理方法
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噪声功率不确定性区间估计和降低SNR WALL恶化的能量检测算法 被引量:7
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作者 谢显中 胡小峰 马彬 《电子与信息学报》 EI CSCD 北大核心 2014年第2期364-370,共7页
能量检测是认知无线电系统中广泛采用的空闲频谱检测方案,但其性能受到噪声功率不确定性(NPU)的严重影响。该文提出一种新颖的复杂度较低的NPU区间估计算法,并且从理论上分析了估计的噪声功率对能量检测信噪比墙(SNR WALL)恶化的影响,... 能量检测是认知无线电系统中广泛采用的空闲频谱检测方案,但其性能受到噪声功率不确定性(NPU)的严重影响。该文提出一种新颖的复杂度较低的NPU区间估计算法,并且从理论上分析了估计的噪声功率对能量检测信噪比墙(SNR WALL)恶化的影响,得出了SNR WALL恶化性定理。进一步基于门限修正提出一种改进的能量检测算法以消除SNR WALL恶化。仿真结果表明,该算法能较为精确地估计NPU区间,并且验证了SNR WALL恶化性定理的正确性;同时,改进的能量检测算法性能要优于稳健的统计方案(RSA)能量检测的结果,并且改进后降低了SNR WALL恶化,提高了检测的鲁棒性。 展开更多
关键词 认知无线电 噪声功率不确定性(NPU) NPU区间估计 信噪比墙恶化 能量检测
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Power Balance Estimation in Long Duration Discharges on QUEST 被引量:1
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作者 K.HANADA H.ZUSHI +18 位作者 H.IDEI K.NAKAMURA M.ISHIGURO S.TASHIMA E.I.KALINNIKOVA Y.NAGASHIMA M.HASEGAWA A.FUJISAWA A.HIGASHIJIMA S.KAWASAKI H.NAKASHIMA O.MITARAI A.FUKUYAMA Y.TAKASE X.GAO H.LIU J.QIAN M.ONO R.RAMAN 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第11期1069-1075,共7页
Fully non-inductive plasma start-up was successfully achieved by using a well- controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which... Fully non-inductive plasma start-up was successfully achieved by using a well- controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components. 展开更多
关键词 steady state operation spherical tokamak plasma wall interaction power balance
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Power losses caused by longitudinal HOMs in 1.3-GHz cryomodule of SHINE 被引量:4
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作者 Jun-Jie Guo Qiang Gu +2 位作者 Meng Zhang Zhen Wang Jian-Hao Tan 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第7期16-26,共11页
Shanghai high-repetition-rate XFEL and extreme light facility (SHINE), the first hard XFEL based on a superconducting accelerated structure in China, is now under development at the Shanghai Institute of Applied Physi... Shanghai high-repetition-rate XFEL and extreme light facility (SHINE), the first hard XFEL based on a superconducting accelerated structure in China, is now under development at the Shanghai Institute of Applied Physics, Chinese Academy of Sciences. In this paper, power losses caused by trapped longitudinal high-order modes (HOM), steady-state loss, and transient loss generated by untrapped HOMs in the 1.3-GHz SHINE cryomodule are investigated and calculated. The heat load generated by resistive wall wakefields is considered as well. Results are presented for power losses of every element in the 1.3-GHz cryomodule, caused by HOM excitation in the acceleration RF system of the continuouswave linac of SHINE. 展开更多
关键词 power loss HIGHER-ORDER MODES (HOMs) Resistive wall WAKEFIELDS Impedance SUPERCONDUCTING CAVITIES
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Experimental Investigation on Space-dispersed Double-wall Jet Combustion System for DI Diesel Engine
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作者 郭鹏江 高希彦 《Defence Technology(防务技术)》 CAS 2012年第1期1-10,共10页
A space-dispersed double-wall jet combustion system was developed by adopting the wall-guiding spray method and the stratification theory.The experimental test was carried out to optimize the structural parameters of ... A space-dispersed double-wall jet combustion system was developed by adopting the wall-guiding spray method and the stratification theory.The experimental test was carried out to optimize the structural parameters of the diesel-engine combustion system,including chamber structure,swirl ratio of cylinder head,included angle of jet orifice,number and diameter of jet orifice,fuel injection pressure and timing.The effect of double-wall jet combustion system on combustion and engine performance was tested to obtain the best performance indexes,and the double-wall jet combustion system was compared to the prototype.The results show that NOx is reduced from 712 PPm to 487 PPm at 2 100 r/min,and from 593 PPm to 369 PPm at 3 000 r/min,which are reduced by 31.6% and 37.7%,respectively.The smoke intensity was reduced form 3.67 BSU to 2.1 BSU,and the oil consumption was reduced from 240.5 g/(kW·h) to 225.4 g/(kW·h),which was decreased by 6.3% at low speed.The pressure in the cylinder was obviously reduced from 115 bar to 108 bar,which was reduced by 6%. 展开更多
关键词 power machinery engineering wall-guiding double-wall jet diesel engine COMBUSTION
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计算机视觉的电站锅炉水冷壁缺陷检测方法 被引量:2
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作者 王云霞 杨增阳 +1 位作者 岳海姣 杨守波 《机械设计与制造》 北大核心 2024年第2期246-249,254,共5页
发电厂锅炉巡检可有效避免安全事故发生,针对现场巡检过程中,锅炉水冷壁巡检区域较大,部分区域检测困难问题,开发一种基于YOLOv3模型的水冷壁缺陷检测系统。无人机携带视觉采集装置,对豫能集团某电厂锅炉水冷壁进行图像采集,画面经压缩... 发电厂锅炉巡检可有效避免安全事故发生,针对现场巡检过程中,锅炉水冷壁巡检区域较大,部分区域检测困难问题,开发一种基于YOLOv3模型的水冷壁缺陷检测系统。无人机携带视觉采集装置,对豫能集团某电厂锅炉水冷壁进行图像采集,画面经压缩后实时无线传输到检测末端装置,采用YOLOv3算法对水冷壁数据进行分析,对模型重要参数进行调整并做出样本增广与平衡化改进处理,提高检测效果,共测出磨损、裂缝、氧化等106处失效部位,与人工检测对比,成功率达77.9%。该方法解决了在巡检区域大、部分区域检测困难问题,使大型电站锅炉在开展水冷壁检测方面实际付出的成本得到有效缩减。 展开更多
关键词 电站锅炉 水冷壁 无人机 YOLOv3 缺陷检测
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Theory of Seebeck Coefficient in Multi-Walled Carbon Nanotubes
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作者 Shigeji Fujita James McNabb III Akira Suzuki 《Journal of Modern Physics》 2013年第5期628-637,共10页
Based on the idea that different temperatures generate different conduction electron densities and the resulting carrier diffusion generates the thermal electromotive force (emf), a new formula for the Seebeck coeffic... Based on the idea that different temperatures generate different conduction electron densities and the resulting carrier diffusion generates the thermal electromotive force (emf), a new formula for the Seebeck coefficient (thermopower) S is obtained: S=(2/3)ln2(qn)-1εFkBD0, where kB is the Boltzmann constant, and q, n, εF, D0 are charge, carrier density, Fermi energy, density of states at εF, respectively. Ohmic and Seebeck currents are fundamentally different in nature, and hence, cause significantly different behaviors. For example, the Seebeck coefficient S in copper (Cu) is positive, while the Hall coefficient is negative. In general, the Einstein relation between the conductivity and the diffusion coefficient does not hold for a multicarrier metal. Multi-walled carbon nanotubes are superconductors. The Seebeck coefficient S is shown to be proportional to the temperature T above the superconducting temperature Tc based on the model of Cooper pairs as carriers. The S follows a temperature behavior, , where Tg ’= constant, at the lowest temperatures. 展开更多
关键词 THERMOELECTRIC power (Seebeck Coefficient) Multi-walled Carbon NANOTUBES The Model of COOPER PAIRS
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基于GT-power的DPF捕集效率影响因素研究
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作者 刘彪 唐成章 +3 位作者 毛天美 黄杨 莫书婷 吴雪 《时代汽车》 2023年第2期162-164,共3页
DPF是目前人们公认最有效的柴油机后处理装置,同时是柴油机满足国VI以上排放法规的必备装置。在实现其经济性和安全性的同时,提高DPF的捕集效率一直是研究的关键。文章利用GT-power软件搭建DPF仿真模型,研究不同载体直径、通道长度、载... DPF是目前人们公认最有效的柴油机后处理装置,同时是柴油机满足国VI以上排放法规的必备装置。在实现其经济性和安全性的同时,提高DPF的捕集效率一直是研究的关键。文章利用GT-power软件搭建DPF仿真模型,研究不同载体直径、通道长度、载体壁厚、壁面渗透率和孔隙率对DPF捕集效率的影响。其研究结论表明DPF的捕集效率随着通道长度、孔隙率、载体壁厚的增加而增大,随着壁面渗透率的增大而下降。 展开更多
关键词 DPF GT-power 捕集效率 孔隙率 壁面渗透率
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Wall-climbing Robot with Negative Pressure Sucker Used for Cleaning Work
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作者 赵言正 《High Technology Letters》 EI CAS 1999年第2期85-88,共4页
The Wall climbing Robot is a kind of robot used in extremely hazardous environment, which has very widely use. In this paper, we introduced a new kind of wall climbing robot, which are used in cleaning work. It was de... The Wall climbing Robot is a kind of robot used in extremely hazardous environment, which has very widely use. In this paper, we introduced a new kind of wall climbing robot, which are used in cleaning work. It was designed with single sucker and special designed sealing mechanism, which can be used to do cleaning work on ceramic and glasses surface of high buildings(about 70 meters). 展开更多
关键词 wall CLIMBING Robot NEGATIVE pressure SUCKER power line CARRIER
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新型4-RRPS爬壁机器人及风电塔筒运行环境下的稳定性分析
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作者 马铁强 崔晓森 +1 位作者 杨慧生 郑崟 《机械管理开发》 2024年第2期1-4,共4页
在风电机组运维领域中的运维爬壁机器人大多属于特级高处作业,根据特级高处作业特点,爬壁机器人的作业安全性尤为重要,而稳定性是安全性的必要条件。以4-RRPS构型爬壁机器人吸附在塔筒壁面时为分析工况,以吸附力为分析切入点,展开其相... 在风电机组运维领域中的运维爬壁机器人大多属于特级高处作业,根据特级高处作业特点,爬壁机器人的作业安全性尤为重要,而稳定性是安全性的必要条件。以4-RRPS构型爬壁机器人吸附在塔筒壁面时为分析工况,以吸附力为分析切入点,展开其相关稳定性研究与分析工作。具体包括结构整体在极限倾覆和滑落工况下的最小吸附力分析、单腿抬举运动所需最小推力分析、结构整体的静态稳定裕度分析、携载平台三种工况运动稳定性分析,最终证明该爬壁机器人具备运动平稳性。 展开更多
关键词 4-RRPS爬壁机器人 风电塔筒 吸附力 稳定性分析
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Modulation Equations for Roll Waves on Vertically Falling Films of a Power-Law Fluid
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作者 Abdelaziz Boudlal Valery Liapidevskii 《World Journal of Mechanics》 2012年第1期1-8,共8页
Waves of finite amplitude on a thin layer of non-Newtonian fluid modelled as a power-law fluid are considered. In the long wave approximation, the system of equations taking into account the viscous and nonlinear effe... Waves of finite amplitude on a thin layer of non-Newtonian fluid modelled as a power-law fluid are considered. In the long wave approximation, the system of equations taking into account the viscous and nonlinear effects has the hyper- bolic type. For the two-parameter family of periodic waves in the film flow on a vertical wall the modulation equations for nonlinear wave trains are derived and investigated. The stability criterium for roll waves based on the hyperbolicity of the modulation equations is suggested. It is shown that the evolution of stable roll waves can be described by self-similar solutions of the modulation equations. 展开更多
关键词 power-LAW Fluid THIN Film Flow VERTICAL wall Modulation EQUATIONS Nonlinear Stability ROLL Wave
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不带外置床的700 MW超超临界循环流化床锅炉失电后水冷壁安全计算分析 被引量:1
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作者 邓启刚 吕卓 +4 位作者 石友 鲁佳易 周旭 王奥宇 杨冬 《发电技术》 CSCD 2024年第2期240-249,共10页
通过对某660 MW电厂失电事故过程中烟气温度、蒸汽温度及工质流量的变化规律进行分析,得到了炉膛密相区、过渡区及稀相区热负荷随时间的变化规律。在此基础上,以某700MW超超临界循环流化床(circulating fluidized bed,CFB)锅炉为对象,... 通过对某660 MW电厂失电事故过程中烟气温度、蒸汽温度及工质流量的变化规律进行分析,得到了炉膛密相区、过渡区及稀相区热负荷随时间的变化规律。在此基础上,以某700MW超超临界循环流化床(circulating fluidized bed,CFB)锅炉为对象,建立了失电事故发生后水冷壁内的流动传热计算模型,开发了以Fortran语言为基础的水冷壁内瞬态特性计算程序。分别对密相区、过渡区及稀相区进行分析,通过计算得到了失电后的水冷壁壁温及出口工质温度等热力参数的变化规律。计算结果表明:失电后水冷壁密相区出口的最高壁温为558.6℃,稀相区出口的最高壁温为579.6℃,不需要配备紧急补水泵来保证失电后水冷壁的安全。研究结果可为电厂处理超超临界CFB锅炉失电事故提供指导。 展开更多
关键词 超超临界 循环流化床(CFB)锅炉 失电 热负荷 水冷壁
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风电塔筒外壁爬壁机器人结构设计
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作者 臧祎辰 单光坤 +2 位作者 马铁强 刘思洁 杨慧生 《机械管理开发》 2024年第2期122-123,127,共3页
以风电塔筒外壁运维检测机器人为研究对象,设计了一款可适应风电塔筒外壁曲面的爬壁机器人。针对机器人所处的工作环境,设计了机器人的整体结构布局,计算并验证了机器人所用驱动气缸的参数。根据机器人的整体结构布局,详细介绍了机器人... 以风电塔筒外壁运维检测机器人为研究对象,设计了一款可适应风电塔筒外壁曲面的爬壁机器人。针对机器人所处的工作环境,设计了机器人的整体结构布局,计算并验证了机器人所用驱动气缸的参数。根据机器人的整体结构布局,详细介绍了机器人的转向运动原理。最后对机器人的曲面适应性进行了计算分析,验证了机器人的曲面适应性,证明了结构设计的合理性。 展开更多
关键词 风电塔筒 爬壁机器人 曲面适应
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软土地区紧邻超高压电力管线的深基坑工程设计与研究 被引量:4
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作者 魏仁杰 《岩土工程技术》 2024年第1期65-69,共5页
以上海地区某紧邻超高压电力管线的深基坑工程为研究对象,介绍了紧邻超高压电力管线侧基坑的围护形式,并根据管线保护要求,提出相应的保护措施。通过对比分析支护结构变形的理论计算值和实际监测值得出:(1)围护体侧向变形均呈“鱼腹型... 以上海地区某紧邻超高压电力管线的深基坑工程为研究对象,介绍了紧邻超高压电力管线侧基坑的围护形式,并根据管线保护要求,提出相应的保护措施。通过对比分析支护结构变形的理论计算值和实际监测值得出:(1)围护体侧向变形均呈“鱼腹型”抛物线形状,地连墙的抗变形能力明显优于灌注桩;(2)地表沉降在一定程度上可以反映管线的垂直位移。基坑开挖前的施工工况会对周边道路和管线造成一定的影响;(3)实测变形比理论计算偏大,是因为理论计算的变形值仅考虑了开挖过程中围护结构的变形。 展开更多
关键词 软土地区 超高压管线 地下连续墙 侧向变形 地面沉降
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Pyrolyzed Iron Phthalocyanine-Modified Multi-Walled Carbon Nanotubes as Composite Anode in Marine Sediment Microbial Fuel Cells and Its Electrochemical Performance
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作者 ZAI Xuerong DUAN Zhiwei +2 位作者 CHEN Wei YU Jian FU Yubin 《Journal of Ocean University of China》 SCIE CAS CSCD 2019年第6期1395-1401,共7页
Improving the performance of anode is a crucial step for increasing output power of marine sediment microbial fuel cells(MSMFCs)to drive marine monitor to work for a long term on the ocean floor.A pyrolyzed iron phtha... Improving the performance of anode is a crucial step for increasing output power of marine sediment microbial fuel cells(MSMFCs)to drive marine monitor to work for a long term on the ocean floor.A pyrolyzed iron phthalocyanine modified multi-walled carbon nanotubes composite(FePc/MWCNTs)has been utilized as a novel nodified anode in the MSMFC.Its structure of the composite modified anode and electrochemical performance have been investigated respectively in the paper.There is a substantial improvement in electron-transfer efficiency from the bacteria biofilm to the modified anode via the pyrolyzed FePc/MWCNTs composite based on their cyclic voltammetry(CV)and Tafel curves.The electron transfer kinetic activity of the FePc/MWCNTs-modified anode is 1.86 times higher than of the unmodified anode.The maximum power density of the modified MSMFC was 572.3±14 m W m^-2,which is 2.6 times larger than the unmodified one(218.3±11 m W m^-2).The anodic structure and cell scale would be greatly minimized to obtain the same output power by the modified MSMFC,so that it will make the MSMFC to be easily deployed on the remote ocean floor.Therefore,it would have a great significance for us to design a novel and renewable long term power source.Finally,a novel molecular synergetic mechanism is proposed to elucidate its excellent electrochemical performance. 展开更多
关键词 marine sediment MICROBIAL fuel cells iron phthalocyanine/multi-walled carbon NANOTUBE composite MODIFIED anode electrochemical kinetics power density
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太阳能光伏降温与热风内墙蓄热耦合系统发电与供暖特性研究
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作者 祁式展 余涛 《制冷与空调(四川)》 2024年第5期636-641,661,共7页
提出一种耦合光伏发电余热与热风内墙的供暖系统(简称PV/T-HVIW系统),该系统能有效提高光伏发电效率和室内温度。使用TRNSYS软件建立该系统的仿真模型,模拟分析了光伏电池累计发电量、集热器集热量、室内空气温度和供暖负荷。结果表明:... 提出一种耦合光伏发电余热与热风内墙的供暖系统(简称PV/T-HVIW系统),该系统能有效提高光伏发电效率和室内温度。使用TRNSYS软件建立该系统的仿真模型,模拟分析了光伏电池累计发电量、集热器集热量、室内空气温度和供暖负荷。结果表明:本系统相较于独立运行的光伏发电系统在供暖季发电量提高8.2%,平均发电效率提升约1.6%;回收的余热能够有效改善室内热舒适,相较于无该系统的普通居住建筑和热风直接供暖的建筑,室内夜间最低空气温度分别提高了6.3℃和2.7℃,保证室内最低温度为15℃时,夜间供暖负荷减少了88.0%和61.1%。 展开更多
关键词 光伏余热 热风内墙 蓄热 发电特性 供暖特性
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“双碳”背景下BIPV的应用与探索 被引量:3
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作者 马才 向宴德 马元 《太阳能》 2024年第2期5-10,共6页
“双碳”目标提出后,中国的绿色经济发展有了更加明确的方向。城镇化率不断增长的同时,中国的建筑业进入了鼎盛发展时期;但与此同时出现的建筑能耗问题也越来越严重,这种发展形式与“双碳”目标背道而驰。而光伏发电技术与建筑相结合成... “双碳”目标提出后,中国的绿色经济发展有了更加明确的方向。城镇化率不断增长的同时,中国的建筑业进入了鼎盛发展时期;但与此同时出现的建筑能耗问题也越来越严重,这种发展形式与“双碳”目标背道而驰。而光伏发电技术与建筑相结合成为解决这一问题的有效方式,光伏建筑一体化(BIPV)产业的发展是实现“双碳”目标的重要途径。针对当前BIPV产业的发展状况及发展优势进行了分析,并分析了影响BIPV建筑发电量的因素,然后从技术、法律法规、市场3个方面提出了优化举措。分析结果显示:光伏组件方位角及安装倾角、光伏组件表面灰尘及其安装方式是制约BIPV建筑发电量的主要因素,BIPV后续发展需要从技术方面进行改进以确保年发电量达到预期目标;BIPV产业应从技术、法律法规及市场3个方面进行改进和完善,有助于其更好的发展。该研究结果对BIPV理论研究和工程人员施工设计具有一定的参考价值。 展开更多
关键词 “双碳”目标 光伏发电 光伏建筑一体化 光伏屋面 光伏幕墙
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燃煤电站锅炉水冷壁膨胀状态在线监测系统
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作者 郑卫东 潘友国 +3 位作者 熊伟 林思宇 罗利佳 王伟达 《中国特种设备安全》 2024年第4期32-37,44,共7页
在燃煤发电机组频繁启停、深度调峰以及长期低负荷运行的背景下,由膨胀异常导致的水冷壁拉裂事故逐渐增多,严重威胁发电机组的安全稳定运行。针对这一问题,本文研制了水冷壁膨胀状态在线监测系统,首先利用激光测距技术和4G无线传输技术... 在燃煤发电机组频繁启停、深度调峰以及长期低负荷运行的背景下,由膨胀异常导致的水冷壁拉裂事故逐渐增多,严重威胁发电机组的安全稳定运行。针对这一问题,本文研制了水冷壁膨胀状态在线监测系统,首先利用激光测距技术和4G无线传输技术在线测量水冷壁不同点位的膨胀位移,然后通过对膨胀位移数据进行统计分析,实时评估水冷壁的膨胀状态和损伤程度。在百万千瓦火电机组上的测试结果表明该系统能够有效监测水冷壁的膨胀状态变化,具有实时性强、灵敏度高、准确性好等优点,为解决水冷壁的膨胀拉裂问题提供了有效的方法,对提升电站锅炉的安全性和稳定性具有重要意义。 展开更多
关键词 电站锅炉 水冷壁 热膨胀 在线监测
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