Experimental investigation of supercapacitor based regenerative energy storage for a fuel cell vehicle equipped with an alternator

Recently, researchers have devoted more attention to supercapacitors (SCs) to integrate with batteries in energy storage systems (ESSs) for vehicle applications. In this study, we attempted to characterize the use of SCs in the ESS for a PEM fuel cell vehicle equipped with an alternator to maximize the performance of regenerative braking. We applied lithium-ion batteries (LIBs) and SCs as energy storage devices to examine their effect on ESS. Then we used a hysteresis brake to apply controllable braking force on the flywheel to form hybrid braking (HB) and made efforts to study its behavior to suggest a braking control strategy. We also ran the whole system over the rotational speed to cover the range of driving speed. At last, we sized the SCs for the most commonly used fuel cell electric vehicle (FCEV) in Korea, i.e., Hyundai NEXO, based on the results obtained from the above study by alternator efficiencies.     

分户计量供暖节能住宅户型修正研究

针对多层住宅中不同户型在耗热量上的差异，引入户型体形系数修正各户的计量用热量，以计算和实测方法分析了一栋节能住宅不同围护结构户型的能耗特点，发现山墙、屋面、地面造成的不同户型之间的耗热量差别小于传统建筑；使用面积大的住户山墙造成的户型间耗热量差别小于使用面积小的住户。     

管材拉伸模具定径区摩擦力的探讨

管材拉伸时把模具定径区看作准塑区，利用塑性条件，研究定径区摩擦力对拉伸力的影响，并对计算公式进行探讨。证明管材空拉（减径不减壁）时摩擦力影响可忽略不计，但减径、减壁拉伸同时进行时，定径区摩擦力对拉伸力的影响就必须考虑。     

城市生活垃圾能源利用探讨

报道了城市有机废弃物转化为能源的几种途径。在管式反应器内甘蔗渣裂解气化制煤气以及在高压釜内湿式裂解气化制煤气液体产品，可得到中值煤气。也研究了甘蔗渣二步法糖化和糖发酵，当ＰＨ为３．６，酵母浓度为１．３３％，乙醇产率可达理论值的６４．８６％。     

φ100mm定径机轧辊孔型设计改进

针对定径机换辊后定径钢管所出现的质量问题,提出了成品机架的轧辊孔型不分配变形量和适当增大孔型直径的改进措施。     

磷酸酯淀粉在纯棉细特高密织物浆纱中的应用

就磷酸酯淀粉在纯棉细号高密织物中的上浆情况进行了试验，提出了具体浆纱工艺和减少织造断头率，提高织物效率及布面质量对策，实验表明，磷酸酯淀粉完全适应于纯绵细特高密织物的上浆要求。     

Municipal solid waste conversion to energy

In recent years it has been recognised by an increasing number of nations that there is considerable energy potential within MSW. As a result many countries have established R,D& D programmes to examine methods of exploiting this potential. The IEA's MSW Conversion Activity was set up in 1986 to provide an infrastructure for sharing information and co-ordinating work in this area internationally. This Activity was extended in 1989 and currently a total of 9 nations participate in it.

To cope with the wide scope of the area (encompassing both biological and thermal processing of MSW) the Activity was divided into three subgroups or Expert Working Groups (EWGs). Each of these dealt with a distinct area of expertise:

1. •Downstream effects of source separation and screening of MSW

2. •Sampling and analytical protocols

3. •Landfill gas

In addition to these groups a central secretariat based at Harwell (UK) has provided guidance, established and administered databases of contacts and produced a series of national reports.

This paper describes the achievements of the Activity and discusses work proposed for the future.     

Long-chain fatty ammonium quaternaries in papermaking

A series of long-chain quaternary ammonium halogen esters (UKK-chemicals), quaternary dimethyl tallow epoxypropyl ammonium halogens (EPK1), quaternary ditallow methyl epoxypropyl ammonium halogens (EPK2), and EPK2 oligomers (EPK2P) were synthesized. At acidic, neutral, or slightly basic conditions, EPK1-, EPK2-, EPK2P-, and UKK-chemicals operate as cationic chemicals. They can be used, for example, as stock sizings, surface sizings, or fixatives. Stock sizing, surface sizing, and fixative experiments indicate that EPK1-, EPK2-, EPK2P-, and UKK-chemicals function at least as well as or better than the corresponding synthetic chemicals used in papermaking.     

入炉煤分炉计量系统的应用探讨

介绍了江西贵溪发电厂的入炉煤分炉计量系统在节能方面开展的一些应用情况。     

工程结构优化设计发展综述

 着重评述了工程结构优化设计研究领域从最初的尺寸优化发展到形状优化、拓扑优化的基本历程及其相关特点，并对优化设计选用的优化算法进行了归类，提出了这一领域今后仍然有待于发展的主要方面．