非甲烷类燃气发动机技术研究

介绍了常见的一些非甲烷类燃气的特点,结合燃气评价指标,对非甲烷类燃气的特性进行了介绍。针对非甲烷类燃气发动机,从燃气发动机的进气方式、增压匹配、点火方式、空燃比控制以及辅助系统进行了阐述,介绍了非甲烷类燃气发动机技术应用的一些方法,为燃气发动机的研究开发提供了研究依据。     

生物质气化过程燃气净化技术研究进展

生物质燃气必须经过净化后才能进行使用。文章针对生物质气化过程中燃气净化效率低、焦油脱除困难等问题,对不同种类燃气净化设备（机械式、过滤式、洗涤式和静电式）的优缺点进行了对比研究,并对利用多级设备联合净化燃气的技术措施和方法进行了分析,深入探讨了生物质燃气在净化过程中面临的问题。同时,基于我国农村小型生物质气化站低成本、低能耗、高效率的要求进行考虑,指出开发高效低廉的适用于农村小型生物质气化站的多级燃气净化系统是促进生物质气化集中供气推广的关键技术。     

燃气空调的应用技术与经济分析

提出了燃气空调的技术方案,叙述了每种方案的组成、工作原理和特点。通过对电力、燃气制冷供暖应用的分析,指出使用燃气空调在解决电力、燃气峰谷负荷,保护环境、节约能源、提高一次能源利用率等方面都有着显著的优点。对燃气空调系统的初投资、运行费用、绿色环保等进行了技术经济分析,并给出了详细的分析结果。指出燃气空调有着美好的发展前景。     

一个生物质燃气厂的运营分析

介绍了以生物质为原料的燃气厂的制气工艺;给出了燃气厂的主副产品及其主要技术指标;通过与其它燃气进行比较及其效益分析,指出了干馏法制取生物质燃气工艺的特点。经过数年的运营表明,生物质燃气厂具有显著的经济效益、社会效益和环境效益。     

开发研制油田污水源燃气机热泵的热经济性分析

阐述了国内外开发研制燃气机热泵的背景与现状、油田余热资源状况和利用情况、油田利用热泵技术的现状,对开发研制油田污水源燃气机热泵的可行性进行了分析,并对油田污水源燃气机热泵系统的热经济性进行了预测。     

气体燃料及燃气机的技术研究与应用

介绍了各种典型气体燃料特性及燃气机的特点和主要机型,对燃气机的应用进行了探讨。指出由于气体燃料不同,其性质也不同,燃用不同气体燃料的燃气机在结构和性能上差异也较大,不同的气体燃料决定了燃气的甲烷值、混合气热值、空燃比等气体特性,也决定了燃气机进气方式、压缩比、点火时间、控制方式等结构形式和性能参数等指标。     

气体燃料燃烧特性分析计算与软件开发及应用

气体燃料是发动机的燃料之一,燃料种类繁多、组分不同,没有统一标准。用于燃气机必定对燃气机各项经济技术指标、结构设计有不同的要求,如何对各种气体燃料燃烧特性进行分析及评价,是燃气机设计首先要解决的问题。本文对各种气体燃料的燃烧特性进行了分析、计算,并开发了计算机分析计算软件,作为燃气机设计时参考。     

浅析双燃料发动机燃气进气方式

从双燃料发动机燃气进气系统的结构布局、系统成本以及发动机的性能等方面对两种燃气进气方式的优缺点进行了阐述,通过试验数据对比,对两种燃气进气方式的发动机性能差异原因进行了分析。     

一种螺旋管式多孔介质燃气热水器的设计

多孔介质是一种可以提高换热性能的新型节能材料,将多孔介质应用到燃气热水器中,可提高燃气热水器的热效率、降低污染物排放量、缩小燃气热水器体积.本文设计了一种螺旋管式多孔介质燃气热水器,采用试验对比的方法对其进行了验证性试验,测试结果显示节能效果显著,为多孔介质燃气热水器的研究与开发提供了帮助.     

气体燃料燃烧特性分析计算与软件开发及应用

气体燃料是发动机的燃料之一,燃料种类繁多、组分不同,没有统一标准.用于燃气机必定对燃气机各项经济技术指标、结构设计有不同的要求,如何对各种气体燃料燃烧特性进行分析及评价,是燃气机设计首先要解决的问题.本文对各种气体燃料的燃烧特性进行了分析、计算,并开发了计算机分析计算软件,作为燃气机设计时参考.     

Improving the overall environmental performance of existing powergenerating facilities

Superior environmental performance has not traditionally been a goal of managers of power generating facilities, but there is now considerable pressure to go “beyond compliance,” even for facilities that have been in existence for decades. In this regard, significant environmental improvement can be achieved by taking a life-cycle perspective. The authors have conducted a streamlined life-cycle assessment on an existing gas/oil-fired generating facility. With the results of this assessment as a basis, they propose a number of generic steps that can be taken to improve the environmental performance of most existing power generating facilities     

彭水水电站水轮机参数选择

介绍彭水水电站选型设计中对水轮机主要参数的合理选择，通过技术经济比较，确定机组的最佳选型方案和单机主要技术参数。     

Grid connected fuel cell and PV hybrid power generating system design with Matlab Simulink

Renewable energy sources have been taken the place of the traditional energy sources and especially rapidly developments of photovoltaic (PV) technology and fuel cell (FC) technology have been put forward these renewable energy sources (RES) in all other RES. PV systems have been started to be used widely in domestic applications connected to electrical grid and grid connected PV power generating systems have become widespread all around the world. On the other hand, fuel cell power generating systems have been used to support the PV generating so hybrid generation systems consist of PV and fuel cell technology are investigated for power generating. In this study, a grid connected fuel cell and PV hybrid power generating system was developed with Matlab Simulink. 160 Wp solar module was developed based on solar module temperature and solar irradiation by using real data sheet of a commercial PV module and then by using these modules 800 Wp PV generator was obtained. Output current and voltage of PV system was used for input of DC/DC boost converter and its output was used for the input of the inverter. PV system was connected to the grid and designed 5 kW solid oxide fuel cell (SOFC) system was used for supporting the DC bus of the hybrid power generating system. All results obtained from the simulated hybrid power system were explained in the paper. Proposed model was designed as modular so designing and simulating grid connected SOFC and PV systems can be developed easily thanks to flexible design.     

Analysis of tonal noise generating mechanisms in low-speed axial-flow fans

The present paper reports a comparison of experimental SPL spectral data related to the tonal noise generated by axial-flow fans. A nine blade rotor has been operated at free discharge conditions and in four geometrical configurations in which different kinds of tonal noise generating mechanisms are present: large-scale inlet turbulent structures, tip-gap flow, turbulent wakes, and rotor-stator interaction. The measurements have been taken in a hemi-anechoic chamber at constant rotational speed and, in order to vary the acoustic source strength, during low angular acceleration, linear speed ramps. In order to avoid erroneous quantitative evaluations if the acoustic propagation effects are not considered, the acoustic response functions of the different test configurations have been computed by means of the spectral decomposition method. Then, the properties of the tonal noise generating mechanisms have been studied. To this aim, the constant-Strouhal number SPL, obtained by means of measurements taken during the speed ramps, have been compared with the propagation function. Finally, the analysis of the phase of the acoustic pressure has allowed to distinguish between random and deterministic tonal noise generating mechanisms and to collect information about the presence of important propagation effects.     

新型减温减压装置的热力计算及强度分析

对一种新型火力发电机组用减温减压装置进行了研究,讨论了其集管轴向喷射流量均匀分配的设计准则及蒸汽流通能力的计算方法,对集管外侧档板受力和档板结构应力强度进行了分析,并以某600MW火电机组二级旁路中所用减温减压装置为例,对其进行了较核计算。     

部分煤气化结合流化床燃烧技术的联合循环(PGFBC-CC)发电系统参数分析

作者对典型PGFBC－CC发电系统进行了较全面的参数分析，找出了影响系统性能的主要参数，并为提高这类发电系统性能提出了一些有益的措施及建议。     

PG5301燃气轮机发电机组现状分析和修复的经济效益

某油田电厂PG5301燃气轮机发电机组运行时间不长,由于环境条件,进气过滤问题以及尖峰负荷运行时间过长使局部零件受损,降低了功率、效率和运行的可靠性,有可能在局部修复后就能获得较大的经济效益。     

Dynamic modeling and simulation of a solar direct steam‐generating system

A dynamic model of solar parabolic trough collectors has been developed and solved by explicit Euler's method to predigest partial differential equations to ordinary differentials in this paper. Different working conditions of the collector structure and thermal parameters have been considered in the model. The simulated results are validated using the selected real test data on typical summer and winter days, and the steam‐generating process from unsaturated water to superheated steam has been studied in the startup simulation. The disturbance analysis validates the model's dynamic responses and confirms the relations between output steam characters and solar radiation, inlet water temperature, flow rate and collectors' area. The results indicate the possible demarcation point of superheated steam generating in different working conditions. Therefore, the model can be used to analyze the performance of the solar direct steam‐generating system. Copyright © 2010 John Wiley & Sons, Ltd.     

新型无刷双馈变速恒频风力发电系统的建模与数字仿真

无刷双馈变速恒频风力发电系统具有可靠性高和能够最大限度地实现风电能量转换等一系列优点。介 绍了无刷双馈风力发电机及其变速恒频风电系统的组成,建立了基于Simulink技术的发电机仿真模型,研究了该 种发电机的变速恒频控制技术。仿真研究初步验证了发电机模型与控制策略的正确性。     

汽水全流及闪蒸发电系统能量利用率的比较

本文从能量利用角度,对热水、汽水混合物的全流发电方法和闪蒸发电方法进行了比较。在汽水混合发电系统中,提出当量热水温度概念,简化了汽水混合发电系统的热力计算。在实际汽水发电系统中,对与闪蒸发电量相同的全流发电系统进行热力计算,得到了不同热源温度、干度下全流动力机的最小内效率曲线。