低速柴油机主起动阀试验装置的研制

设计开发了一套由计算机数据采集系统控制的主起动阀试验装置。介绍了该试验装置的功能、原理和结构;重点介绍了试验装置的测控系统。试验验证表明：该试验装置能准确模拟主起动阀的实际运行工况,可用作验证主起动阀的使用性能和可靠性。     

低速柴油机盘车机试验装置研制

设计开发了一套由计算机数据采集系统控制的盘车机试验装置。介绍了该盘车机试验装置的功能、原理和结构,重点介绍了试验装置的测控系统。试验验证表明:该盘车机试验装置使用方便、可靠,能准确模拟盘车机的实际运行工况,为新型盘车机的研制创造了良好的条件。     

模块化可编程控制器在密封油系统试验装置中的应用

介绍了模块化结构的PLC在氢冷发电机密封油系统试验装置的试验数据采集应用实例,并与传统的试验室数据采集系统进行了比较.配置合适精度的模拟量处理模块的PLC系统可以成为试验室数据采集系统方案设计时的另一种选择,尤其是在设计非单纯的数据采集系统,试验设备也需要实行智能控制时,PLC系统自身就能够做到数字量、模拟量的输入输出相互关联,系统可以被设计为当上位机发生故障时仍然可以对外部设备进行有效的控制,确保设备和人员安全.PLC系统在此类试验装置中具有较大的优势。     

H∞优化设计应用于水轮机调速系统的试验研究

本文以水轮机调速系统为对象对H~∞优化设计进行了试验研究。首先建立了水轮发电机组和电液随动系统的数学模型,以此为基础在水轮机调速器实时动态试验装置上进行实时仿真试验,结果表明采用H~∞优化设计的系统具有良好的性能。     

柴油机SCR系统试验台架改进设计

为了解决传统的柴油机SCR系统试验台架无法控制催化反应温度和对不同排量发动机检测适应性差造成检测结果误差较大等问题,本研究在传统试验台架的基础上,设计一种能够控制催化反应温度的柴油机SCR台架试验装置,提高台架试验装置的适应性及测量的准确性,为检测和提高SCR系统性能研究提供可靠的试验条件。     

利用系统仿真法测试电子调速器的性能

用系统仿真法（即采用计算机仿真柴油机,构成一模拟试验装置）考核、测试和分析电子调速器性能,经济、方便且安全。对电子调速器的研制开发、使用维护都有很大的促进作用。对利用系统仿真法考核与测试船用柴油机电子调速器配机性能进行了有益的探索与研究,并采用数字计算机仿真技术,测试了一柴油机电子调速器配机模拟试验装置。初步实验结果表明:该装置能较逼真地模拟电子调速器与柴油机配机的工作情况,并能方便地测取电子调速器的主要性能参数。     

发动机进排气系统稳流试验装置中LabWindows/CVI的应用研究

介绍了LabWindows/CVI虚拟仪器软件在发动机进排气系统稳流试验装置中的开发应用。着重阐述了该软件串行口通讯控制及其与Microsoft Excel2000之间的动态数据交换的实现。     

火花点火式煤层气发动机台架试验测试系统

简要介绍了火花点火式煤层气发动机台架试验装置和测试系统的组成,详细叙述了各主要参数的测量原理,并给出了部分测量结果。该测试系统较好地满足了台架试验的要求,为研究煤层气组分浓度变化时发动机的工作特性和获取电控单元所需的控制数据提供了基本条件。     

油田射孔器材试验装置加热系统的数学模型与仿真分析

根据射孔器材耐高温高压试验装置的技术要求,设计了井式双循环电加热炉系统,建立了该加热炉炉膛传热过程的数学模型。通过仿真,分析了该加热系统工艺参数对沿程温度场分布的影响,为高精度控制该装置高温高压釜内的油温度起到了指导和预测作用。在实际测量中验证了该模型计算的有效性。     

国内大型高速动平衡试验装置概述

对高速动平衡试验装置主要系统进行了简要介绍,给出了国内主要高速动平衡试验装置的参数对比,为其它企业建造高速动平衡装置提供参考。     

Comparison of photovoltaic devices containing various blends of polymer and fullerene derivatives

Large area photovoltaic devices based on an interpenetrating network of donor and acceptor molecules have been fabricated showing power conversion efficiencies up to 1.5% under monochromatic illumination at 500 nm. Devices containing blends of solubilized poly (paraphenylene vinylene), (PPV) or poly thiophene derivatives as donors with various fullerene derivatives as acceptors are compared. It is shown that among the various combinations of materials both the open-circuit voltage and the short-circuit current are maximal for a blend of PPV and a highly soluble methano fullerene. For a further increase of the efficiency of these devices, a reduction of the thickness of the active layer is suggested.     

Thermo-fluidic devices and materials inspired from mass and energy transport phenomena in biological system

Mass and energy transport consists of one of the most significant physiological processes in nature, which guarantees many amazing biological phenomena and activities. Borrowing such idea, many state-of-the-art thermofluidic devices and materials such as artificial kidneys, carrier erythrocyte, blood substitutes and so on have been successfully invented. Besides, new emerging technologies are still being developed. This paper is dedicated to presenting a relatively complete review of the typical devices and materials in clinical use inspired by biological mass and energy transport mechanisms. Particularly, these artificial thermo-fluidic devices and materials will be categorized into organ transplantation, drug delivery, nutrient transport, micro operation, and power supply. Potential approaches for innovating conventional technologies were discussed, corresponding biological phenomena and physical mechanisms were interpreted, future promising mass-and-energytransport-based bionic devices were suggested, and prospects along this directionwere pointed out. It is expected that many artificial devices based on biological mass and energy transport principle will appear to better improve various fields related to human life in the near future.     

Thermo-fluidic devices and materials inspired from mass and energy transport phenomena in biological system

Mass and energy transport consists of one of the most significant physiological processes in nature, which guarantees many amazing biological phenomena and activities. Borrowing such idea, many state-of-the-art thermo-fluidic devices and materials such as artificial kidneys, carrier erythrocyte, blood substitutes and so on have been successfully invented. Besides, new emerging technologies are still being developed. This paper is dedicated to presenting a relatively complete review of the typical devices and materials in clinical use inspired by biological mass and energy transport mechanisms. Particularly, these artificial thermo-fluidic devices and materials will be categorized into organ transplantation, drug delivery, nutrient transport, micro operation, and power supply. Potential approaches for innovating conventional technologies were discussed, corresponding biological phenomena and physical mechanisms were interpreted, future promising mass-and-energy-transport-based bionic devices were suggested, and prospects along this direction were pointed out. It is expected that many artificial devices based on biological mass and energy transport principle will appear to better improve various fields related to human life in the near future.     

大型循环流化床电厂运煤系统设计优化及建议

介绍了广东某大型循环流化床电厂运煤系统设计及主要设备运行情况,重点介绍了煤场设置、取料设备、筛碎系统布置、上料管带式输送机的选型及优化,并介绍了运行情况,对以后同类电厂运煤系统的选型设计提出了建议,为今后大型循环流化床电厂运煤系统设计提供参考。     

架空乘人装置在煤矿中的应用

详细阐述了架空乘人装置井下应用时应遵循的设计要求,并通过实例对比指出了该装置所具有显著的经济效益和社会效益。分析总结了架空乘人装置在使用过程中存在的常见问题,并给出了有针对性的应对措施,最后,指出了架空乘人装置未来的发展方向。     

Energy and exergy analysis at the utility and commercial sectors of Malaysia

In this paper, sectoral energy and exergy analysis model is applied to the utility and commercial sectors of Malaysia by considering the energy and exergy flows from 1990 to 2003. The energy and exergy efficiencies are determined for the sub-sectors and devices used in these two sectors. It has been found the hydroelectric power plant sub-sector is more energy and exergy efficient compared to the thermal power plant sub-sector. The energy and exergy efficiencies of utility and commercial sectors of Malaysia are compared with a few other countries around the world as well. The utility and commercial sectors of Malaysia are found to be more efficient than that of Thailand, Brunei, China, and Vietnam in 1999.     

闭式回收技术在蒸汽冷凝水回收利用中的应用

分析了企业蒸汽冷凝水排放和利用的现状,提出采用闭式回收蒸汽冷凝水技术对全厂蒸汽冷凝水系统进行改造。结果表明,采用闭式回收技术,各路蒸汽冷凝水可以完全得到回收,并用于工艺管线和设备的伴热;伴热温度均在规定的范围之内,伴热后的热水用于橡胶生产之中,起到了节能节水的作用。     

加装导流装置的凝汽器喉部流场的三维数值模拟

针对凝汽器喉部布置低压加热器而导致喉部出口流场的不均匀现象,采用模型并结合壁面函数法,利用SIMPLEC算法编程,对某300 MW汽轮机凝汽器喉部加装导流装置前、后的流场进行了三维数值模拟和对比分析.结果表明:加装导流装置前.内置式低压加热器使凝汽器喉部出口流场的分布具有不均匀性;加装导流装置后,喉部出口流场的分布趋于均匀.通过数值模拟,给出了加装导流装置的最佳方案.汽轮机的实际运行情况表明:加装导流装置后,提高了凝汽器的真空,从而改善了汽轮机运行的经济性,达到了节能降耗的目的.     

船用柴油机尾气中NO_x和PM综合处理技术研究

在船用柴油机减排方面,尾气后处理起到了重要作用。柴油机尾气中NOx和PM的处理技术也越来越成熟,在实践中也获得良好的效果。物理、化学多种处理手段结合使用,各处理方法的应用也使得尾气处理装置基本满足尾气的处理要求,同时降低装置能耗和运行成本,提高了综合处理能力。本文结合部分研究内容介绍了船舶尾气PM和NOx的处理技术及催化处理的发展现状。     

小型风机的特点及其在制冷空调设备中应用的注意事项

小型风机虽然效率较低,但在制冷空调设备等小型家用电器中应用却很广泛。通过论述造成小型风机效率低的原因,指出了小型风机在制冷空调设备中应用的注意事项以及提高其运行性能的措施,并强调应力加强小型风机技术的研究。