周期性脉冲流体对滴流床反应器性能的影响

用铜铬催化剂催化的过氧化氢分解反应作为液体限制反应的例子来研究周期性脉冲流体对滴流床反应器性能的影响.初步研究表明:当催化剂非完全润湿时,周期性脉冲流体能够提高反应器的性能;当催化剂完全润湿时,周期性脉冲流体不能提高反应器的性能,甚至还会产生不利影响.     

铅冷快增殖堆物理和热工水力研究

对25MW电功率铅冷快增殖堆堆芯进行了物理和热工水力概算，并将计算结果与相同功率的钠冷快增殖堆的结果进行了分析比较。从初步概算的结果来看，铅冷快增殖堆是一种安全可行的快增殖堆堆型。     

ATHLET 程序及其在低温供热堆中的应用

ATHLET 程序是德国核设施安全评审中心GRS开发的一个重要的反应堆热工水力学分析程序.它可分析除堆芯熔化事故之外的其他设计基准事故,可应用于美欧传统和先进的压水堆和沸水堆,原苏联设计的压水堆(VVER)和石墨水冷堆(RBMK),以及加拿大的CANDU堆等反应堆系统的热工分析.介绍了微机版ATHLET程序,并用它对5 MW低温供热堆自然循环稳态运行工况进行了计算,结果和试验数据符合很好.     

Flow Simulation and Optimization of Plasma Reactors for Coal Gasification

This paper reports a 3-d numerical simulation system to analyze the complicated flow in plasma reactors for coal gasification, which involve complex chemical reaction, two-phase flow and plasma effect. On the basis of analytic results, the distribution of the density, tempera-ture and components‘ concentration are obtained and a different plasma reactor configuration is proposed to optimize the flow parameters. The numerical simulation results show an improved conversion ratio of the coal gasification. Different kinds of chemical reaction models are used to simulate the complex flow inside the reactor. It can be concluded that the numerical simulation system can be very useful for the design and optimization of the plasma reactor.     

滴流床设计放大中的重要参数及其数学模型

讨论了在滴流床放大过程中必须加以考虑的重要物理和化学因素以及这些因素对设计放大的影响．介绍了确定这些参数的原理和方法，推荐了用于计算这些参数的关系式，列举了用于不同反应系统的数学模型，比较了模型预测值与实验值．     

一种快速压缩遗传算法及其仿真研究

给出了压缩遗传算法的模式定理以及收敛性和运算参数的分析，并提出一种快速压缩遗传算法(fcGA)．该算法用压缩遗传算法(cGA)运行少量代数得到的概率值及其运行代数组成一个观测样本，借助于统计学中的最小二乘法估算几万代以后的概率值，组成新的概率矩阵并根据该矩阵产生新的个体，用这些新的个体更新概率矩阵．旅行商问题(TSP)的仿真证明，该算法是一种十分高效的遗传算法．     

高速采样示波器中的时基失真及其估计

介绍了时基失真的概念及产生原理。改进了美国NIST提出的时基失真的数学模型，据此模型仿真出时基失真的数据，进而仿真出测量数据。给出了为估计采样示波器的时基失真所采取的方法——最小二乘法。这种方法需要在多相位、多频率上测量信号，可以精确地估计谐波模型的阶数。最后介绍了如何根据已经得到的估计值来修正时基失真。     

Mineralogy of clean coal combustion by-products

Coal combustion technologies are changing in order to burn coal more cleanly. Many “clean combustion“ and postcombustion technologies are developed to remove SO2 and NOx gases, particulate matter during combustion, or from the flue gases leaving the furnace. This paper focuses on three types of fly ash (flue gas desulfurization (FGD) residuals, atmospheric fluidized bed combustion (AFBC) residuals and sorbent duct injection (SDI) residuals) which produced by “the clean combustion“ and postcombustion technologies. The residuals formed by FGD are PCFA (pulverized coal fly ash) grains entrained with reacted and unreacted sorbent and have lower bulk densities than PCFA grains because it contains higher concentrations of calcium and sulfur, and lower concentrations of silicon, aluminum and iron than PCFAs. AFBC residuals consist of spent bed which is a heterogeneous mixture of coarse-grained bed material and irregularly shaped, unfused, spherical PCFAs. The main crystalline phases in AFBC residuals are anhydrite (reacted sorbent), quartz and lime (unreacted sobent), calcite, hematite, periclase, magnetite and feldspars.The residuals produced by SDI contained 65%-70% PCFA with the larger sizes material being irregularly shaped, fused or roughedged. The reaction products of sorbent (portlandite and lime) included calcium sulfate (anhydrite) and calcium sulfate. The chemical properties of these residuals are similar to those of high calcium PCFAs because of the high alkalinity and high pH of these residuals.     

宝钢马迹山港供电系统无功补偿分析

针对宝钢马迹山港原供电系统功率因数低下的问题，提出了一种新的无功补偿容量计算方法。此方法结合TCR FC的补偿方案，成功实现了该供电系统在冲击性负荷下功率因数大于0．9的目标。     

产氚聚变堆概念设计系统研究

提出了基于球环类型的先进氚生产堆概念设计,它是聚变能发展的中间应用。与传统托卡马克氚生产堆不同,设计中利用了球形环的先进等离子体物理性能和紧凑的结构特征,并尽量利用真空室内的空间安置氚生产包层以减少氚泄露而增加氚增殖率,达到年生产氚1000 g的目标,相应的堆利用因子为40％。在2D中子学计算的基础上提出了较为完整的初步概念设计。逐项进行了分析,同时对设计的风险、不确定性和后备方案也做了概括的解释。为下一步更详细、具体的概念设计提供了直接的依据和重要的参考价值。