车载燃料电池诊断装置的研究

介绍了一种特殊的车载燃料电池诊断装置,该装置包括控制单元、燃料气体供给单元、电力调整单元、冷却单元和电力消耗单元。该装置可以精确地再现车辆行驶期间燃料电池堆的异常情况,便于在修理车间对其进行彻查,及时发现并排除故障。当燃料电池的冷却系统或燃料气体供给系统受到损坏时,利用该诊断装置的冷却单元和燃料气体供给单元也可以对燃料电池堆进行准确的诊断。

运输成本测度方法探讨

目前对交通运输成本的测度方法主要有直接成本法和估计外部成本法。文中分析了现有方法的优劣,探索建立一种新的运输成本的方法,既能像直接成本法一样广泛应用,又能像估算外部成本法一样全面反映运输成本。文中基于投入产出思想,利用基本消耗单元的概念,提出了衡量运输成本的基本消耗单元法,探索建立计算交通运输全成本的衡量方法。

运输全成本的构成及衡量方法探讨

目前,我国交通运输业的成本不能通过价格得到全面体现。现有的文献中,存在运输全成本归纳不全、全成本的各指标量纲不同、难以统一的问题。本文分析了运输全成本的构成,提出了运输成本的指标体系,并利用运输消耗基本单元为单位,对运输全成本进行衡量。

Operation and Optimization of Residue Hydrotreating Unit Using New Catalyst System

This article has summarized the optimized measures relating to the loading of catalyst,and the sixth operating cycle of the residue hydrotreating unit at SINOPEC's Maoming Branch Company,and made a detailed comparison on the impurities removal rate,hydrogen consumption and energy consumption of the sixth operating cycle with those achieved by the previous five cycles.Test results have revealed that the second-generation RHT series novel residue hydrotreating catalysts featured high activity,good stability,and long operating cycle and could remarkably reduce the hydrogen consumption and energy consumption of process unit.The hydrotreated AR product,having low Conradson carbon residue,low sulfur content,low metal content,high content of saturated hydrocarbons,and low content of asphaltenes and resins,is an excellent FCC feed.Judging from their overall property the second-generation RHT series of residue hydrotreating catalysts used in the sixth operating cycle have commanded a leading position among other catalysts used in previous operating cycles.