BD-200型板钉式空气预热器腐蚀原因浅析

胜华炼油厂常减压炉采用了 BD- 2 0 0型不锈钢板钉式空气预热器。投用不到 9个月 ,其换热板就出现了大面积腐蚀穿孔。通过对燃料油性质与现场使用情况的调查研究分析 ,确认腐蚀主要原因为 SO2 ,SO3等酸性气体在湿式环境中对不锈钢的硫酸露点腐蚀。     

加氢裂化分馏塔航空煤油干点软测量

基于BP网络、RBF网络、PLS算法建立了加氢裂化分馏塔航空煤油干点软测量模型。在此基础上开发了BP-RBF-PLS的航空煤油干点软测量混合模型。在工业装置上投入运行,精度较高,为实现先进控制创造了条件。     

几种典型石油酸酯的基本性质--倾点、密度及折光率的研究

对我国４种典型石油酸酯基本性质的研究表明,石油酸二元醇二酯的倾点、密度和折射率比石油酸一元脂肪酸酯大。石油酸中脂肪酸含量的增加,将显著升高石油酸酯的倾点。石油酸酯类油可达到多种粘度级别（１００℃下粘度为３～１７ｍｍ＾３／ｓ）,并具有良好的粘性能（粘度指数为９０～１１５）和低的倾点（－５８－－２０℃）。     

天然气的低温处理方法

低温分离,是利用地层本身能量节流降压制冷,用低温分离方法脱除天然气中凝液的处理工艺。其特点是工艺流程及设备简单,运行可靠,维修方便,操作范围弹性大,适用于高压大流量条件,流量和压力易于调节。当地层压力下降过低时,该制冷工艺不适用。     

钻井液处理剂及体系对聚合醇JLXI浊点的影响

聚合醇类水基防塌钻井液体系(简称 PEM)作为适应环境保护要求的一种新型钻井液体系应用越来越广泛。PEM 的核心处理剂为聚合醇类水基防塌润滑剂 JLX,JLX是一种非离子型低分子量聚合物,其作用机理是具有浊点特性。研究了钻井液体系及常用处理剂对两种聚合醇 JLX1 和JLX2 浊点的影响。实验结果表明,无机处理剂如 KCl 对 JLX浊点有显著的影响;而有机高分子处理剂的影响则较复杂,低浓度时能使 JLX 浊点上升,高浓度时则使 JLX 浊点下降;体系也能降低 JLX 浊点,并且对低浓度的无机处理剂如 KCl有一定的缓冲作用。     

Physical and thermal behaviour of Sr-La-Al-B-Si based SOFC glass sealants as function of SrO content and B2O3/SiO2 ratio in the matrix

A series of SOFC glass sealants with composition SrO (x), La₂O₃ (15), Al₂O₃ (15), B₂O₃ (40 − x), and SiO₂ (30) [x = 10, 15, 20, 25 and 30] (wt.%) [SLABS] are investigated for their structure property correlations at different compositions. Quantitative Fourier transform infrared spectroscopy shows structural rigidity with increasing SrO content, as demonstrate by an increase in the Si-O-Si/O-Si-O bending and B-O-B stretching frequencies. The role of SrO as a modifier dominates the control of the structure and behaviour of glasses compared with the effect of network formers, i.e., the B₂O₃/SiO₂ ratio. Consequent to the structural changes, increasing substitution of B₂O₃ by SrO the glasses causes increases in the density, glass transition temperature and dilatometric softening point. On the other hand, the crystallization temperatures show a decreasing trend and the coefficient of thermal expansion increases with increase in substitution.     

Optimization and design of energy transport system for solar cooking application

This paper proposes a hybrid solar cooking system where the solar energy is transported to the kitchen. The thermal energy source is used to supplement the Liquefied Petroleum Gas (LPG) that is in common use in kitchens. Solar energy is transferred to the kitchen by means of a circulating fluid. Energy collected from sun is maximized by changing the flow rate dynamically. This paper proposes a concept of maximum power point tracking (MPPT) for the solar thermal collector. The diameter of the pipe is selected to optimize the overall energy transfer. Design and sizing of different components of the system are explained. Concept of MPPT is validated with simulation and experimental results.     

Regulatory framework and business models for charging plug-in electric vehicles: Infrastructure,agents, and commercial relationships

Electric vehicles (EVs) present efficiency and environmental advantages over conventional transportation. It is expected that in the next decade this technology will progressively penetrate the market. The integration of plug-in electric vehicles in electric power systems poses new challenges in terms of regulation and business models. This paper proposes a conceptual regulatory framework for charging EVs. Two new electricity market agents, the EV charging manager and the EV aggregator, in charge of developing charging infrastructure and providing charging services are introduced. According to that, several charging modes such as EV home charging, public charging on streets, and dedicated charging stations are formulated. Involved market agents and their commercial relationships are analysed in detail. The paper elaborates the opportunities to formulate more sophisticated business models for vehicle-to-grid applications under which the storage capability of EV batteries is used for providing peak power or frequency regulation to support the power system operation. Finally penetration phase dependent policy and regulatory recommendations are given concerning time-of-use pricing, smart meter deployment, stable and simple regulation for reselling energy on private property, roll-out of public charging infrastructure as well as reviewing of grid codes and operational system procedures for interactions between network operators and vehicle aggregators.     

热熔粘合衬粉点涂层加工工艺探讨

通过对8508涤棉粉点粘合衬生产工艺的研究,分析了影响产品质量的重要因素,提出了相应措施和解决方法.     

圆柱体测量与计算

针对机械成品检测中圆柱体轴线难以测得有效数据的问题，提出了一种通过测量其表面点而间接计算轴线的方法。描述了采样规则，分析了算法的理论依据，并给出程序说明。该方法已用于实际检测