共查询到18条相似文献,搜索用时 171 毫秒
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介绍了一种新型的大规模蓄能技术——压缩空气蓄能(Compressed Air Energy Storage,CAES),CAES系统响应快、容量大、成本低、寿命长,逐渐成为了全球第二大蓄能技术。根据CAES系统的容量不同,将CAES系统划分为大型CAES、小型CAES和微型CAES3种,并针对3种不同容量级的CAES,详细介绍了其组成及现状,对技术特点与难点和应用领域及场景进行了分析与概述。对CAES系统的研究方向与发展前景进行了展望。 相似文献
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提出一种新型恒压喷水压缩空气储能系统,利用废弃煤矿等地下洞穴,在水下布置尼龙布管储存压缩空气,形成以地下洞穴为下库,地面水池为上库的水力辅助恒压压缩空气储气体系;膨胀与压缩过程采用单级多缸随转式膨胀压缩两用机实现,导热油蓄能和放能过程采用共享设备原路返回方案。通过建立系统的热力学模型,分析了在空气入口处喷水控制压缩空气出口温度,以及由地下洞穴深度确定的压缩段出口空气压力,环境温度等因素对系统性能的影响。分析表明:在压缩机出口压力及温度为10 MPa和320℃、环境温度25℃、换热端差10℃和膨胀压缩两用机等熵效率0.85的工况条件下,储能系统转换效率达到66.6%。 相似文献
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太阳能的间歇性和波动性不利于太阳能发电大规模并网,实施电力储能可平抑输出功率波动,改善电能质量。目前,我国大规模的电力储能只有抽水蓄能,却受到水资源的限制而无法普遍开展。提出了基于压缩空气蓄能(compressed air energy storage, CAES)的太阳能发电站功率调节系统,给出了CAES调节系统额定功率、容量等系列关键参数的设计方案,并选取案例对CAES系统仿真模拟。结合电站所在地区负荷变化及与局域电网电能交换数据,对比了采用CAES功率调节系统前后太阳能发电并网对局域电网的影响,分析结果表明CAES调节太阳能发电能有效地缓解对局域电网的冲击。 相似文献
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在分析传统压缩空气储能(CAES)技术的工作原理和技术特点的基础上,介绍了压缩空气储能技术的发展,包括非绝热压缩空气储能技术(D-CAES)、绝热压缩空气储能技术(A-CAES)、液化空气储能技术(LAES)和超临界压缩空气储能技术(SC-CAES)等,并给出了评价不同系统性能的技术参数。以国际上第一座压缩空气储能电站——德国Huntorf电站的运行参数和相关情况为例,分析了D-CAES技术的应用情况;对压缩空气储能技术在美国及其他国家和地区的应用和发展现状进行分析。通过对比不同的压缩空气储能技术方案,分析了A-CAES、LAES、SC-CAES及LCES储能系统的先进性、竞争优势与不足,分析了未来CAES技术的发展趋势。 相似文献
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基于含水层储能水、热运移的基本理论与控制方程,针对地下咸水层储能过程中渗流溶液密度及粘滞性系数变化显著的特点,对现有的地下含水层储能数学模型进行修正、完善,建立地下咸水层耦合储能模型,探索不同储能模式下含水层温度场变化规律及阶段性热量运移特征。研究结果得到,采用地下原水与去离子水回灌时,在储热运行期与间歇停运期粗粉砂层中热作用半径变化率分别为0.272m/d、0.008m/d,0.348 m/d、-0.04 m/d。在储能阶段,伴随回灌溶液温度上升、盐度降低,地下水渗流速度上升,导致对流换热与热弥散效应增强;间歇阶段,则由于地下咸水与回灌溶液间盐度梯度增大,在分子扩散作用下回灌溶液温度场影响范围减弱。 相似文献
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压缩空气储能被认为是最具发展潜力的大规模物理储能技术,储气装置作为压缩空气储能系统的关键环节,对系统高效、稳定和安全运行具有重要影响.近些年来,随着压缩空气储能技术的快速发展,储气装置的研究备受人们关注.储气装置的特点主要取决于其材料属性,因此本文根据材料不同对储气装置进行分类,并着重论述了天然地下洞穴储气、人造洞室储气、金属材料储气以及复合材料储气的应用.对比分析表明,天然地下洞穴储气规模大、成本低,但是依赖于特殊地质和地理条件,因此应积极探索具有灵活布置特性的新型储气方案.进一步地,本文阐述了不同类型储气装置当前所面临的挑战,分别探讨了储气装置精准热力学模型建立、地下洞穴储气稳定性评价以及复合材料储气结构特性研究中亟需解决的重点和难点,并对未来储气装置的发展趋势以及研究热点进行了展望和总结.旨在为压缩空气储能系统储气装置的选型和理论研究提供指导,为改善压缩空气储能系统和储气装置性能提供借鉴. 相似文献
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张玮灵古含章超葛昂应元旭 《储能科学与技术》2023,(4):1295-1301
近年来,压缩空气储能作为新型储能的一种重要类型,受到业界越来越多的关注。自2021年以来已有多个10 MW级以上项目陆续并网,压缩空气储能的技术正在逐步成熟,产业化进程开始加速。本文首先简要介绍了压缩空气储能的技术路线和4个关键环节,并将后续研究聚焦于目前技术相对成熟且工程应用最多的绝热压缩空气储能。接着通过梳理分析已建、在建和规划项目的技术经济指标,总结提出技术经济特点及发展趋势。在技术层面,压缩空气储能具有运行寿命长、涉网性能良好、安全风险小等优势,未来将向大规模、高效率、系统化方向发展。在经济层面,压缩空气储能目前造价水平较高,随着产业成熟和技术进步,未来基于盐穴和人工硐室储气的压缩空气储能造价有望低于现有大中型抽水蓄能造价水平,基于管线钢的压缩空气储能造价有望与同等规模中小型抽水蓄能造价水平相当。最后,本文讨论了压缩空气储能的投资成本回收问题,在当前市场环境下压缩空气储能难以获得合理投资回报,需要政策引导支持。建议按照由点及面、示范先行的思路,初期从示范项目入手给予一定电价政策。 相似文献
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With the increasing penetration of renewable energy into energy market, it is urgent to solve the problem of fluctuations of renewable energy sources (RES). Energy storage technology is regarded as one method to cope with the unstable nature of RES. One of these technologies is compressed air energy storage (CAES), which is a modification of the basic gas turbine technology. Electric power supplied by CAES can meet peak-load requirement of electric utility systems. Because there is heat waste in the existing CAES systems during compression process, fossil fuels are used to improve the expansion work to generate peak power. In order to avoid the use of fuels and keep high efficiency of system, CAES system with thermal energy storage (TES) is designed to capture and reuse the compressed air heat. This paper uses a thermodynamic model of a CAES system with TES to analyze the effect of TES on system efficiency. Besides, this paper evaluates the influence of temperature and pressure on the utilization of heat in TES. Results show that even when power efficiency reaches maximum, there is still a proportion of thermal energy left in TES for other use. Meanwhile, the utilization of heat in TES can be affected by pressure in the air storage chamber. With appropriate selection of pressure limits, the utilization of compressed air heat can be optimized. 相似文献
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Energy storage systems are becoming more important for load leveling, especially because of the widespread use of intermittent renewable energy. Compressed air energy storage (CAES) is a very promising method for energy storage because CAES relies on existing technologies, is less expensive, and easier to site and permit, as compared to pumped hydro storage. But, in the case of CAES employing hard rock caverns or man-made air vessels, although the smallest possible cavern volume is desirable in order to minimize the construction cost and optimize utilization of the given space, the operating pressure range in the cavern must be limited in order to reduce the deterioration in efficiency of the CAES system at off-design conditions. In this paper, a new constant-pressure CAES system combined with pumped hydro storage was studied to address the current problem associated with the conventional CAES systems. An energy and exergy analysis of the novel CAES system was performed in order to understand the operation characteristics of the system according to several different compression and expansion processes; we then examined the effects of the height of the storage cavern and heat transfer between two media (air, water) and the cavern on the performance of the novel CAES system. 相似文献
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Compressed air energy storage (CAES) power systems are being considered by electric utilities for load-leveling application. Their economic benefit and the extent of premium fuel conservation is dependent on their design. An optimum design approach for CAES is presented in this paper. It is based on decomposition of the overall CAES plant/utility grid system into three partially-decoupled sybsystems. Technical and economic models of the subsystems are used in a constrained optimization procedure. The constraints are imposed by the physical characteristics of the subsystems, by interaction among the subsystems and by the interfacing requirements imposed by the utility.To illustrate the concepts, models for the system comprising the compressor train, piping, and an aquifer reservoir have been used in the optimization procedure. Results from these studies show that substantial reductions in capital cost and total operating cost can be achieved using optimization techniques. 相似文献
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储能技术是智能电网的关键技术之一,对新能源大规模并网消纳、实现"两个替代"、完成能源结构转型具有重要意义。根据热力学原理分析,等温压缩空气储能技术在理论上具有更高的效率,因此提出了基于等温压缩空气储能原理的虚拟抽水蓄能系统,以及适用于该系统稳定运行的恒功率运行控制策略和适用于电力系统对储能电站功率可调控需求的功率调整运行控制策略,采用基于SVPWM的磁场定向矢量控制方法,借助MATLAB/SIMULINK平台,研究其基于直线电机的系统运行控制策略,通过仿真验证控制策略的可行性。 相似文献
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Energy storage systems are becoming more important for load leveling, especially for widespread use of intermittent renewable energy. Compressed air energy storage (CAES) is a promising method for energy storage, but large scale CAES is dependent on suitable underground geology. Micro-CAES with man-made air vessels is a more adaptable solution for distributed future power networks. In this paper, energy and exergy analyses of a micro-CAES system are performed, and, to improve the efficiency of the system, some innovative ideas are introduced. The results show that a micro-CAES system could be a very effective system for distributed power networks as a combination that provides energy storage, generation with various heat sources, and an air-cycle heating and cooling system, with a energy density feasible for distributed energy storage and a good efficiency due to the multipurpose system. Especially, quasi-isothermal compression and expansion concepts result in the best exergy efficiencies. 相似文献