A process simulation model for a 2 ton h−1 incinerator (a combined bed combustion and furnace heat transfer model)

A process simulation model was constructed for a 2 ton h⁻¹ incinerator. The simulation model was designed to provide system performance parameters according to various operating conditions. In accommodating the wide variation of quality and composition of input wastes, the plant operating parameters such as amount of excess air, preheated air temperature, waste feed rate and primary air distribution over the stoker, etc. must be carefully controlled. The proposed model calculates operating variables of each submodule, by employing steady-state thermal and material balance equations. Combustion of waste bed, and its radiative heat transfer in the combusion chamber are considered. The calculated results of the combustion chamber performance are evaluated, in terms of temperature, locations and width of the flame band, and mean residence time in the secondary combustion chamber. These results are compared with a limited set of field test measurements for verification of the model. © 1998 John Wiley & Sons, Ltd.     

梯级电站短期优化运行的新模型及其最优性条件

提出一种梯级水电站短期优化运行的数学模型，它包括两个子模型，财期平稳日优化运行模型和过渡日优化运行模型，由于梯级间水流流达时间的存在，该模型既考虑了当天运行时对以后的联系和影响，也考虑了实时运行中可能产生的偏离，在考虑水流流达时间影响的条件下，还提出了梯级水电站成化运行的最优性条件。     

电加热管二维温度场计算

针对水平管、倾斜管中单相流及两相流由于自然对流的影响而使壁温、传热系数沿周向表现出不均匀性．提出了利用外壁面的两个边界条件来克服内壁西边界条件的不足．采用“径向节点内缩”技术的电加热管二维温度场数值计算模型。同时用并联网格电阻发热的概念处理非均匀内热源项。用此模型处理了Φ３２×３ｍｍ微倾斜管高压汽水两相流传热数据,结果令人满意。     

多晶立方氮化硼复合材料研究进展

PCBN的性能由其成分和结构决定。通过建立合理的化学条件——化学配方和物理条件——高压高温,实现了CBN-CBN键合。CBN-CBN键合比其它任何结合都强,晶界相是PCBN的薄弱环节。结果PCBN的质量显著提高,PCBN质量不均匀的问题也得到解决。     

三用型水源热泵方案和常规风冷冷水机组加燃油热水锅炉方案的比较

以大连长兴岛高尔夫球场会所为例，根据全年空调负荷、采暖负荷和生活热水负荷，选择了三用型水源热泵方案和风冷冷水机组加燃油热水锅炉方案，并对这两个方案的初投资和运行费用进行了计算；经比较，三用型水源热泵的方案初投资少，运行费用低，是较节能的方案，在地下水源充足的地区应大力推广。     

WHF型夹套反应釜筒体设计压力分析和校核

文章介绍了夹套反应釜的类型及受力分析，对夹套反应釜的实际操作受力情况进行了归纳，提出了夹套反应釜内简壁厚的设计关键是确定设计压力．总结出其设计思路和方法，在实际生产中得到验证。     

A history of numerical modelling of the Wairakei geothermal field

The history of computer modelling of the Wairakei geothermal field is reviewed. It covers the development of lumped-parameter models during the 1970s and then discusses the evolution and first applications of geothermal reservoir simulation techniques. The development of reservoir models of Wairakei at the University of Auckland began in the early 1980s; current models produces good matches against field data. Many future scenarios have been run using the University's models and have been presented at various regulatory hearings. The general conclusion from these scenarios is that Wairakei can continue producing electricity at the current level for at least another 50 years, and if Wairakei is shut down after 100 years of operation it will recover to its pre-exploitation state after a further 300 years.     

方坯连铸机高效化改造实践

针对安钢第一炼轧厂六机六流方坯连铸机运行中存在的问题进行分析,提出了相应的改进措施,经过改进目前该连铸机各项生产、技术指标均取得显著成效.     

地质条件对煤成气赋存的影响

煤成气的形成和保存,运移,富集均受地质条件的控制,本文试图从理论的角度阐述沉积环境、变质程度、区域构造和其它地质条件对煤成气赋存的影响,为煤成气的开发利用和矿山灾害的防冶提供参考。