Honeywell-AlertonBACnet的先驱者

Honeywell—A1erton系统是世界上第一个使用BACnet通讯协议的楼宇自控系统，是促进BACnet标准的先驱者之一，致力于BACnet标准的应用，使整个系统从底层到顶层全部符合BACnet标准。Honeywell—Alerton所有产品都具有BACnet国际组织的标准认证“BTL”，可以实现不同厂商生产的设备与系统的互连和互操作。     

生物柴油燃料对柴油机不同负荷工况微粒粒度分布的影响

利用TS13090 EEPS微粒粒度测试系统,试验研究了生物柴油、石化柴油燃料微粒稳态工况下的粒度分布特征.研究结果表明,高压共轨柴油机微粒排放粒径绝大部分在300 nm以下,生物柴油、石化柴油燃料微粒粒度分布均呈双峰结构,核态蜂值区域在10 nm附近,积聚态峰值区域在60 nm附近.生物柴油燃料微粒排放以小粒径核态微...     

Techno-economic evaluation of thermo-chemical biomass-to-ethanol

Bio-ethanol has received considerable attention as a basic chemical and fuel additive. Bio-ethanol is presently produced from sugar/starch materials, but can also be produced from lignocellulosic biomass via hydrolysis-fermentation route or thermo-chemical route. In terms of thermo-chemical route, a few pilot plants ranging from 0.3 to 67 MW have been built and operated for alcohols synthesis. However, commercial success has not been found. In order to realize cost-competitive commercial ethanol production from lignocellulosic biomass through thermo-chemical pathway, a techno-economic analysis needs to be done. In this paper, a thermo-chemical process is designed, simulated and optimized mainly with ASPEN Plus. The techno-economic assessment is made in terms of ethanol yield, synthesis selectivity, carbon and CO conversion efficiencies, and ethanol production cost. Calculated results show that major contributions to the production cost are from biomass feedstock and syngas cleaning. A biomass-to-ethanol plant should be built around 200 MW. Cost-competitive ethanol production can be realized with efficient equipments, optimized operation, cost-effective syngas cleaning technology, inexpensive raw material with low pretreatment cost, high performance catalysts, off-gas and methanol recycling, optimal systematic configuration and heat integration, and high value byproduct.     

D类音频功率输出级芯片AD1991及其应用

AD1991是两通道BTL或四通道SE D类音频功率输出级芯片。文中主要介绍了AD1991的特点、引脚功能和工作原理，给出了该芯片的几种不同通道模式的应用电路。     

Automotive fuels from biomass via gasification

There exists already a market of bio-automotive fuels i.e. bioethanol and biodiesel produced from food crops in many countries. From the viewpoint of economics, environment, land use, water use and chemical fertilizer use, however, there is a strong preference for the use of woody biomass and various forest/agricultural residues as the feedstock. Thus, the production of 2nd generation of bio-automotive fuels i.e. synthetic fuels such as methanol, ethanol, DME, FT-diesel, SNG and hydrogen through biomass gasification seems promising. The technology of producing synthetic fuels is well established based on fossil fuels. For biomass, however, it is fairly new and the technology is under development. Starting from the present market of the 1st generation bio-automotive fuels, this paper is trying to review the technology development of the 2nd generation bio-automotive fuels from syngas platform. The production of syngas is emphasized which suggests appropriate gasifier design for a high quality syngas production. A number of bio-automotive fuel demonstration plant will be presented, which gives the state of the art in the development of BTS (biomass to synthetic fuels) technologies. It can be concluded that the 2nd generation bio-automotive fuels are on the way to a breakthrough in the transport markets of industrial countries especially for those countries with a strong forest industry.     

BTL技术研究与应用

文中分析了总线驱动问题，ＢＴＬ技术，并介绍了ＢＴＬ技术在ＰＩ－ＢＵＳ中的应用。     

一种BTL低静态功耗CMOS音频功率放大器的设计

对AB类CMOS音频功率放大系统中的核心运放单元电路结构,即基于共漏与共源并联组合的功率级放大电路进行了改进与优化设计a基于CSMC0.6 μm CMOS工艺的仿真结果表明,在5 V电源电压下,静态电流仅为1.59 mA.BTL模式驱动4 Ω的负载,当1 kHz频率点的总谐波失真小于0.1%时,获得的最大输出功率可以达到2 W,电源转换效率为60.7%.     

利用费托合成工艺制备航空生物燃料

航空生物燃料是一种新型的环境友好的可替代燃料。由费托工艺生产的航空生物燃料硫和芳烃含量低,可与常规喷气燃料以最高50∶50的体积比进行掺混,混合后燃料能直接加注到飞机中使用。综述了近年来费托合成工艺在制备航空生物燃料研究中的进展,并且从反应动力学机理,催化剂和反应器三方面进行了详细阐述。     

CD/DVD负载马达驱动电路

基于ROHMDVD方案,采用Antek S3/S4 1um12V1P1 M/1P2 M双极型工艺,本文设计了一款四通道马达驱动电路,对其中两个有代表性的通道进行了分析和测试;并对该电路中的难点进行了分析与设计改进。测试结果表明:在温度T=25℃,当输入电压Vcc=12V,Pvcc=5V时,Sled和Focus通道的最大输出电压分别可以达到约±8.2V和±3.8V,实现了较宽的动态范围,基本满足了设计规格。     

PLC在小浪底电厂筒阀控制系统中的应用

小浪底电厂筒阀系统是由VOITH公司提供。筒阀作为水电厂机组的一部分,越来越起着举足轻重的作用,特别在黄河流域,筒阀在实际使用过程中的优势更明显。本文着重介绍PLC在筒阀控制系统中的作用和BTA -D11型位置测量系统,主要包括其功能、结构和特点,以及其在小浪底电站的应用等。