共查询到20条相似文献,搜索用时 199 毫秒
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介绍了为巴基斯坦恰希玛核电站C-2项目研制的AAC级应急柴油发电机组的主要技术参数及特点。针对核电站应急机组的特殊要求,对柴油机的起动系统和调速控制系统进行了改进。 相似文献
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Combination of a grid connected photovoltaic (PV) plant with a compressed air energy storage system (CAES) and a city gate station (CGS) has been proposed and investigated recently, leading to satisfactory performance results. The only deficiency of this system is the huge amount of fuel required to provide its heating demand. In this work, feasibility of employing evacuated tube solar thermal systems to supply the heating demand of the hybrid power plant is studied. After presenting detailed mathematical modeling, the solar heating units and other components of the power plant are properly sized. The results of simulations demonstrate that a total of 7000 evacuated tube collectors are required in the system, leading to elimination of the air heater from the CAES system completely and 17.2% fuel saving at the CGS. The total annual solar heat of 17.5 GWh is supplied for the system, 214 GWh power could directly be sold to the grid, 9.7 GWh power slumps is recovered and 53.5 GWh power is produced at nights. In the end, internal rate of return (IRR) method is used to compare economically the proposed system with similar systems proposed previously, outperforming all of the other candidates with an IRR of 11.1%. 相似文献
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对莱钢冷轧压缩空气系统进行工艺优化,采用分站分压力联合供气方式,提高了压缩空气的运行质量,解决了系统压力突降问题,节能效果显著。 相似文献
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Air compressor efficiency in a Vietnamese enterprise 总被引:1,自引:0,他引:1
Compressed air systems in a Vietnamese footwear manufacturing enterprise consume about 10% of enterprise's total electric power supply. Energy efficiency of these air compressor systems, either equipped with new and efficient compressors or old and inefficient ones, can only reach between 5% and 10%. In other words, regardless whatever air compressors were installed, energy loss from the compressor systems was over 80%. This study discovered that energy loss was due to non-optimized operations of the air compressor systems and air leakages. The objectives of the paper are to uncover energy saving potential in Vietnamese air compressor systems, demonstrate methodologies used in the auditing and assessment, share auditing and assessment results, and serve a guide on how to analyze energy efficiency in a compressed air system. This paper concludes that energy efficiency investment in air compressor systems in the Vietnamese enterprise could be extremely cost-effective. If the enterprise invests USD 84,000 in the air compressors to improve efficiency performance, the investment capital will be recovered in about six months. The net present value of the investment will be about USD 864,000 at a discount rate of 12%. 相似文献
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In this paper, a micro-hybrid energy storage system, for a small power grid, which combines the concepts of pump storage plant (PSP) and compressed air energy storage (CAES), is proposed. There are two tanks, one open to the air and one subjected to compressed air, as well as a micro-pump turbine (MPT) in the hybrid system. The basic principle is that the MPT utilizes excess power from the grid to pump the water, which in turn compresses the air, and in this way, the energy is changed into internal energy of air. The energy in the air will be released to drive water passing through the MPT to generate power when the supply of power from the grid is insufficient. To validate the above proposal, such a micro-system was designed considering geometrical and operational conditions. Due to the large head variation for MPT, a variable speed machine [1] was designed by means of an inverse design method. After geometrical modeling and mesh generation for the complete configuration of the MPT, which consists of spiral casing, tandem, runner and draft tube, CFD simulations of typical operating points during pump mode and turbine mode were implemented. Special treatments of boundary conditions induced by the air compression or decompression were applied in the simulation. This energy storage system shows promising potential for application as the results indicated that the performance of the system and MPT was comparable. 相似文献
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压缩空气储能系统被认为是最具发展前景的大规模电力储能技术之一,具有广阔发展前景。本文建立了压缩空气储能系统的技术经济性计算模型,并针对蓄热式压缩空气储能系统应用于工业用户的情景,在有无补贴的两种计算条件下,进行了技术经济性分析。研究结果表明,在无补贴条件下,系统内部收益率为16.3%,投资回收期为9.2年;计算补贴时,系统内部收益率为23.8%,投资回收期为6.2年。同时本文还对该系统进行了盈亏平衡、敏感性等不确定性分析,找出影响系统经济性的敏感因素;并得出政策扶持对提高压缩空气储能电站的财务收益水平和抗风险能力具有重要的作用。本文的研究可以为压缩空气储能系统的研究和工程应用提供理论参考和工程指导。 相似文献
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针对DF4B型机车在气候潮湿地区运用时压缩空气湿度过大带来的制动系统故障隐患问题,进行了风源系统空气净化技术改造,在油水分离器前加装冷凝管,在两个总风缸之间加装空气干燥器。实际使用结果表明,改造后的风源系统处理的压缩空气相对湿度可降至30%以下,解决了总风缸空气过湿问题。 相似文献
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本文概述核能对保障我国能源安全从而促进国民经济可持续发展的重要作用,指出我国的压水堆核电技术从第二代向第三代发展,总体上可以说是“今天”核电产业的技术升级工程。快堆及其燃料闭合循环可以充分利用铀资源和实现核废物的最少化,从而保证核裂变能的可持续发展。作者强调,我国核能科技的发展战略不仅要重视“今天”的核电产业的技术升级,更应着眼于“明天”的核能产业的技术开发。尽快启动我国快堆核能系统的技术开发具有极其重要的战略意义。 相似文献