共查询到19条相似文献,搜索用时 203 毫秒
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磁流体发电的国际进展与我国的战略 续 总被引:1,自引:0,他引:1
磁流体发电的国际进展与我国的战略(续)严陆光,居滋象,沙次文,周适,刘廷文(中科院电工研究所)四、向试验电站前进的八十年代在实验室研究发展取得前述重大进展基础上,大家比较一致的认识到,下一阶段主要任务应是研制与建造试验电站,进而可以期望在本世纪末、下... 相似文献
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烧煤磁流体发电机发电通道结构改进 总被引:1,自引:0,他引:1
本文叙述电功率百千瓦级烧煤磁流体发电机发电通道的结构改进要点,指出发电通道结构设计和加工装配中值得注意的技术细节,并讨论磁流体发电机结构设计的关键问题及发展趋势。 相似文献
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有关燃气磁流体发电机电极的研究,不论在实验方面还是在模型分析方面都有新的进展。从推进磁流体发电实用化进程着眼,采用合适的实验诊断技术,发展工程设计计算方法都是极有意义的。 相似文献
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等离子体射流在磁场作用下的特性模拟 总被引:2,自引:0,他引:2
磁流体发电是一种高效、低污染的发电技术。相对于其他发电方式,磁流体发电具有输出功率大、结构紧凑的优点,在高功率电源应用领域有不可替代的性能优势。文中提出采用非平衡等离子体射流的方式产生等离子体,进行磁流体发电的设想。通过数值模拟研究了等离子体射流在横向磁场作用下的特性,并通过试验对模型计算结果进行了验证。模拟研究说明横向磁场对等离子体射流有阻滞作用,在没有外电流回路的情况下,射流气体的动能转化为热,随外加磁场强度的增加,阻滞作用越强,速度减慢越明显;等离子体射流在磁场作用下电流密度主要集中在射流出口附近,并随着外加磁场强度增大而增大。 相似文献
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田纳西大学空间研究所是美国最早开展磁流体发电研究的单位之一。它对磁流体发电的研究作了许多重大的贡献。该所建成了世界上第一台燃煤磁流体发电装置(ECF),还研制了世界上第一副斜框式(DCW),发电通道,这种通道现被认为是最有实用前景的通道形式之一;在环保研究方面,该所进行了工业规模的试验,证明了磁流体发电不仅有自动脱硫。 相似文献
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热化学再生磁流体发电系统——烧煤磁流体发电研究技术路线探讨 总被引:1,自引:1,他引:1
本文简要回顾了磁流体发电研究发展的历史,讨论热化学两者一磁流体发电系统的特点和意义,这一系统有可能导致烧煤磁流体发电技术的新突破。 相似文献
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磁流体发电作为一种新型能量转换技术,自1959年原理试验成功以来,经过二十多年世界范围的努力,以燃气为工质的开环磁流体发电的研究,终于进入了工业性试验的阶段。磁流体发电突破了传统热力循环的温度上限,因而能大幅度提高动力系统的热效率,节约燃料。磁流体发电机,又是一种将热机和电机合为一体的所谓直接发电设备,由于气态工质的电导率低造成的内部损耗,使其作为热机的等熵效率比普通透平机械的低。所以,提高工质 相似文献
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燃煤发电新技术的现状与发展 总被引:1,自引:0,他引:1
概述当前国内外燃煤发电新技术的现状、特点与发展趋势,指出发展联合循环是实现煤的清洁高效发电技术的主要方向,我国应大力开展其相关技术研究,并建立中型规模的示范电站,为将来大规模发展作技术准备。 相似文献
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用全流发电技术加速开发我国地热资源 总被引:1,自引:0,他引:1
全流螺杆膨胀机的研究与试验已取得较大进展,为提高地热发电效率,简化系统,建设快装移动式井口电站创造了条件,本文简要分析了全流系统的热力学特性,介绍天津大学热能研究所D=80mm及D=315mm转子螺杆机的发电情况,通过理论分析及试验数据的推算与西藏羊八井地热发电试验数据比较,指出采用全流螺杆机发电,效率将会有大幅度的提高,文章最后列举了螺杆机的特点,提出了运用螺杆机全流技术和加速发展藏滇地区地热井口电站的设想。 相似文献
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从世界发展趋势展望我国风力发电前景 总被引:33,自引:2,他引:33
对世界风电发展历程和趋势进行评述,提出我国今后风电发展的思路和设想。介绍国外鼓励风电的政策变化和成功的经验,对2020年风电占总电量12%的可能性进行讨论。就我国离网风电商业化和井网风电机组设备制造能力的形成、风电场发展现状和风电特许权示范项目的主要内容进行介绍。 相似文献
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Tetsuji Okamura Shigeharu Kabashima Susumu Shioda Yoshihiro Okuno 《Electrical Engineering in Japan》1992,112(4):65-73
This paper describes superconducting magnets coupled with two kinds of disk-type MHD generators. One is coupled with a disk generator in the closed-cycle MHD experimental facility FUJI-1. The other is for a full-scale disk MHD generator. These are split-pair magnets. In the magnet for the FUJI-1 facility, a unique structure which supports the coils against the electromagnetic force has been fabricated and the magnet has been operating stably. During MHD power generation experiments, an induced voltage across the terminals of the coil was measured. A magnitude of the Faraday current in the generator was calculated from this induced voltage. A possible construction of magnetics for a full-scale disk MHD generator is indicated. It is suggested that a high performance of the generator (output power density of 0.3-1 GW/m3) can be obtained with high magnetic field up to 10 T. 相似文献
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Gaigo Kato Kazumasa Takahashi Takashi Kikuchi Toru Sasaki 《Electrical Engineering in Japan》2023,216(3):e23440
We have demonstrated a capacitively coupled Hall-type MHD generator using ECR plasma. To clarify the characteristics of the fabricated MHD generator, we measured the power generation characteristics as a function of magnetic field strength using a DC Hall-type MHD power generation experiment. The results showed that the output power decreased due to magnetic pressure at the higher magnetic field. However, the output power corresponded to the theoretical value at the lower magnetic field. An AC Hall-type MHD power generation experiment was conducted using an AC magnetic field. As a result, full-wave rectification voltage was observed as per theory. Finally, capacitively coupled Hall-type MHD power generation experiments were conducted, and full-wave rectified waveforms were observed as in AC Hall-type MHD power generation. These waveforms were similar to the output waveforms predicted from theory. These results show that the capacitively coupled Hall-type MHD generator is feasible. 相似文献
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爆炸磁流体发电机研究进展及其关键问题 总被引:6,自引:0,他引:6
磁流体发电是一种直接发电方式。对高功率脉冲电源需求领域而言,爆炸磁流体发电机的比功率很高,在10MW/kg上下,是可行的高功率微秒级脉冲电源。与其它种类脉冲储能装置相比,ED-MHD发电机的功率密度最高。从磁流体发电机通道的基本理论来看,其功率密度和效率的提高还有较大的空间。 相似文献
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I. A. Belyaev V. G. Sviridov V. M. Batenin D. A. Biryukov I. S. Nikitina S. P. Manchkha N. Yu. Pyatnitskaya N. G. Razuvanov E. V. Sviridov 《Thermal Engineering》2017,64(11):841-848
The results are presented of experimental investigations into liquid metal heat transfer performed by the joint research group consisting of specialist in heat transfer and hydrodynamics from NIU MPEI and JIHT RAS. The program of experiments has been prepared considering the concept of development of the nuclear power industry in Russia. This concept calls for, in addition to extensive application of water-cooled, water-moderated (VVER-type) power reactors and BN-type sodium cooled fast reactors, development of the new generation of BREST-type reactors, fusion power reactors, and thermonuclear neutron sources. The basic coolants for these nuclear power installations will be heavy liquid metals, such as lead and lithium-lead alloy. The team of specialists from NRU MPEI and JIHT RAS commissioned a new RK-3 mercury MHD-test facility. The major components of this test facility are a unique electrical magnet constructed at Budker Nuclear Physics Institute and a pressurized liquid metal circuit. The test facility is designed for investigating upward and downward liquid metal flows in channels of various cross-sections in a transverse magnetic field. A probe procedure will be used for experimental investigation into heat transfer and hydrodynamics as well as for measuring temperature, velocity, and flow parameter fluctuations. It is generally adopted that liquid metals are the best coolants for the Tokamak reactors. However, alternative coolants should be sought for. As an alternative to liquid metal coolants, molten salts, such as fluorides of lithium and beryllium (so-called FLiBes) or fluorides of alkali metals (so-called FLiNaK) doped with uranium fluoride, can be used. That is why the team of specialists from NRU MPEI and JIHT RAS, in parallel with development of a mercury MHD test facility, is designing a test facility for simulating molten salt heat transfer and hydrodynamics. Since development of this test facility requires numerical predictions and verification of numerical codes, all examined configurations of the MHD flow are also investigated numerically. 相似文献
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我国已成为可再生能源发电装机规模与发电量最大的国家,可再生能源电力接纳问题日益突出,寻求该问题的解决方案将是"十三五"期间的重大任务。为此,该文从电力系统整体出发,分别从电网侧、发电侧及用户侧,梳理了促进可再生能源电力接纳的技术现状,总结了其技术特征与国内外实践经验,为我国"十三五"期间可再生能源接纳格局的改善提供借鉴。在电网侧,特高压输电技术、柔性直流输电技术、电网智能化技术将为我国可再生能源在更大范围的接纳提供坚强纽带,实现发电侧与用户侧间更为灵活、紧密的联系;在发电侧,常规机组的灵活调节技术、可再生能源的精细预测及主动控制技术、大规模储能技术将推动我国各类电源运行方式的深度转变;在用户侧,可再生能源电力供热、需求侧响应与虚拟电厂等技术将为终端用户主动、柔性地调节自身负荷、更多地使用可再生能源电力提供解决方案。依托特高压输电技术、融入大市场,实现可再生能源最大范围的优化配置,将是适合我国国情的重要选择。 相似文献