Failure Analysis of Differential Protection for the 1# Cooling Bed Rectifier Transformer 1冷床整流变压器差动保护跳闸故障分析
Experimental studies of differential pressure cooling with different outside holes 外部遮挡不同开孔方式差压预冷实验研究
Welded sections will also have locked-in stress owing to a combination of differential heating and cooling cycles as well as to changes in cross section. 焊接面将也有锁紧力,这是因为不同的加热和冷却的循环以及结合面的变形。
The temperature field of a large forged back-up roll during differential heating and cooling was simulated with a computer based finite element method. 利用热处理温度场的计算机模拟软件计算出大型锻钢支承辊锻件差温加热及冷却时的温度场。
Through adopting a series of measures, such as adjusting distribution of stock, controlling differential pressure, strengthening management of damaged cooling equipments, perfecting tap schedule and so on, were adopted in 1997. As results, the smooth and stable operation were achieved. 1997年通过进行技术攻关,采取如下措施:调整布料制度,控制压差,加强对漏水冷却器的管理,完善出渣铁制度,逐步使炉况趋于稳定顺行。
The quartic classical Roger-Kutta numerical differential method, which has better precision in calculation, is used to solve the ordinary differential equation combined with actual cooling condition. 其中,采用精度较高的四阶经典龙格-库塔数值微分方法,并结合具体的冷却条件,对模型的常微分核心控制方程来进行数值计算。
Stress analysis on differential settlement of cooling tower 冷却塔不均匀沉陷的应力分析
Based on a fundamental differential equation derived, the boundary conditions of heat flow output is discussed taking the influences of the space between heating coil and cooling nozzle into consideration. 首次分析了温度场中的热流输出边界条件,并考虑了加热线圈与冷却喷嘴间距的影响。
The effect of characteristic parameters on differential thermal analysis curve, solidification setup temperature and cooling rate on dendrite arm space(λ DAS) was studied, and IAS-4 Image Analysis System was used for microstructural examination. 本文采用差热分析方法研究DTA曲线特征参数、凝固开始温度和冷却速率对二次枝晶间距λDAS的影响,同时使用IAS-4图像分析系统分析了合金的微观组织。
Differential scanning calorimetry ( DSC) was used to study the constant rate heating and cooling and the isothermal crystallizing behavior of the two component PEG system. The characteristic parameters at different temperatures were examined and the heat of exotherms and endotherms was measured. 采用差示扫描量热法(DSC)对二元聚乙二醇(PEG)体系的等速升降温性能及等温结晶性能进行了研究,并对各温度特征参数及熔融、结晶热作了表征。
Application of SCJ-2A humidity differential leak detector of double-water internal cooling generator SCJ-2A型湿度差动检漏仪在双水内冷发电机上应用
This paper sets up the heat-condition differential equations of cylindrical envelope by Laplace transformation and introduces the transfer function method into calculating the cooling load of air conditioning in submarine. As a result, a mathematical model is built up to calculate the thermodynamic system of cylindrical envelope. 通过对圆筒壁的导热微分方程进行拉氏变换,提出以传递函数为基础的空调动态负荷计算方法,推导出圆筒壁热力系统的动态数学模型。
The partial differential equations of stator temperature field model are dispersed with thermal equilibrium equation and are coupled with the temperature equations of water or hydrogen of cooling system. 采用热平衡方程对定子温度场的偏微分方程进行离散化处理,与冷却系统中水温及氢温的计算相耦合,形成联立方程组。
The nonisothermal crystallization kinetics of HDPE/ PE-g-MAH/ Org-MMT was investigated by differential scanning calorimetry with various cooling rates. 用DSC研究HDPE/PE-g-MAH/Org-MMT纳米复合材料非等温结晶行为,用Jeziorny和Mo法进行处理。