压缩空气蓄能—联合循环系统性能分析及优化
发布时间：2018-11-13 13:36
【摘要】：二十世纪七十年代以来,两大问题逐渐成为全世界能源行业的焦点。一是能源短缺危机愈加严重,人们迫切需要寻求提高能源利用效率的方法；二是电网调峰问题日益突出,电力系统的安全性无法得到保障。随着气候变化和全球变暖的问题日益加剧,加之油价上涨的现状和政府的支持,可再生能源的发展和商业化成为大势所趋。使用大规模储能技术,能够有效解决风能和太阳能存在的不稳定、间歇性强的问题,对于可再生能源入网意义重大。 压缩空气蓄能(CAES)系统是一种新型大规模储能系统,可用于电站快速持续调峰,同时也是解决风能等可再生能源不稳定性的一种重要手段。文本以德国Huntorf电站CAES系统为基础案例,利用Aspen Plus软件对其进行了流程模拟,并分析了该电站CAES系统效率较低的原因。在此基础上,提出了两种CAES改进系统,即引入了回热装置以及引入吸收式制冷装置。改进系统分别从压缩阶段和发电阶段对原CAES系统进行废弃能量的再利用,有效提高了系统效率,降低了能量的损耗。 此外,本文还提出了一种“压缩空气蓄能-联合循环”的新系统。该系统在第一代CAES系统的基础上,利用余热锅炉将CAES与蒸汽轮机循环相结合,形成一个全新的联合循环系统。论文基于案例研究,对新系统进行了流程模拟和热力学分析。结果表明：相比于无联合循环的典型第一代CAES系统,新系统有效利用了燃气透平的高温排气,系统电耗与热耗分别降低了0.13kWh/kWh和0.34kWh/kWh,系统效率提高了10个百分点；此外,新系统还利用压缩空气阶段产生的间冷热,保持汽轮机处于热备用状态,大幅提高了整个系统的灵活性。论文研究为如何提高CAES系统效率提供了新的途径,在CAES与其他发电方式相结合方面给出了新的思路。
[Abstract]:Since the 1970 s, two major problems have gradually become the focus of the world energy industry. First, the crisis of energy shortage is becoming more serious, people urgently need to find ways to improve the efficiency of energy use; second, the problem of peak-shaving is becoming more and more prominent, and the security of power system cannot be guaranteed. With the increasing problem of climate change and global warming, as well as the current situation of rising oil prices and government support, the development and commercialization of renewable energy has become a general trend. The use of large-scale energy storage technology can effectively solve the unstable and intermittent problem of wind and solar energy, which is of great significance for renewable energy access to the network. Compressed air energy storage (CAES) system is a new type of large-scale energy storage system, which can be used to rapidly and continuously adjust the peak of power plants, and is also an important means to solve the instability of renewable energy such as wind energy. This paper takes the CAES system of Huntorf power station in Germany as a case, simulates its flow by using Aspen Plus software, and analyzes the reasons for the low efficiency of CAES system in this power station. On the basis of this, two kinds of improved CAES systems are put forward, that is, the regenerative device and the absorption refrigeration system are introduced. The improved system reuses the waste energy of the original CAES system from the compression stage and the generation stage respectively, which effectively improves the system efficiency and reduces the energy loss. In addition, a new system of compressed air energy storage combined cycle is proposed. On the basis of the first generation CAES system, the CAES and steam turbine cycle are combined with the waste heat boiler to form a new combined cycle system. Based on the case study, the flow simulation and thermodynamic analysis of the new system are carried out. The results show that compared with the typical first-generation CAES system without combined cycle, the new system effectively utilizes the high temperature exhaust of the gas turbine, and the power consumption and heat consumption of the system are reduced by 0.13kWh/kWh and 0.34 KW / kWh. respectively. System efficiency increased by 10 percentage points; In addition, the new system makes use of the interspace heat and cold produced by the compressed air stage to keep the steam turbine in a hot standby state, which greatly improves the flexibility of the whole system. This paper provides a new way to improve the efficiency of CAES system and gives a new way to combine CAES with other power generation methods.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM611.3
本文编号：2329269
[Abstract]:Since the 1970 s, two major problems have gradually become the focus of the world energy industry. First, the crisis of energy shortage is becoming more serious, people urgently need to find ways to improve the efficiency of energy use; second, the problem of peak-shaving is becoming more and more prominent, and the security of power system cannot be guaranteed. With the increasing problem of climate change and global warming, as well as the current situation of rising oil prices and government support, the development and commercialization of renewable energy has become a general trend. The use of large-scale energy storage technology can effectively solve the unstable and intermittent problem of wind and solar energy, which is of great significance for renewable energy access to the network. Compressed air energy storage (CAES) system is a new type of large-scale energy storage system, which can be used to rapidly and continuously adjust the peak of power plants, and is also an important means to solve the instability of renewable energy such as wind energy. This paper takes the CAES system of Huntorf power station in Germany as a case, simulates its flow by using Aspen Plus software, and analyzes the reasons for the low efficiency of CAES system in this power station. On the basis of this, two kinds of improved CAES systems are put forward, that is, the regenerative device and the absorption refrigeration system are introduced. The improved system reuses the waste energy of the original CAES system from the compression stage and the generation stage respectively, which effectively improves the system efficiency and reduces the energy loss. In addition, a new system of compressed air energy storage combined cycle is proposed. On the basis of the first generation CAES system, the CAES and steam turbine cycle are combined with the waste heat boiler to form a new combined cycle system. Based on the case study, the flow simulation and thermodynamic analysis of the new system are carried out. The results show that compared with the typical first-generation CAES system without combined cycle, the new system effectively utilizes the high temperature exhaust of the gas turbine, and the power consumption and heat consumption of the system are reduced by 0.13kWh/kWh and 0.34 KW / kWh. respectively. System efficiency increased by 10 percentage points; In addition, the new system makes use of the interspace heat and cold produced by the compressed air stage to keep the steam turbine in a hot standby state, which greatly improves the flexibility of the whole system. This paper provides a new way to improve the efficiency of CAES system and gives a new way to combine CAES with other power generation methods.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM611.3
【参考文献】
相关期刊论文 前3条
1 陈海生;;压缩空气储能技术的特点与发展趋势[J];高科技与产业化;2011年06期
2 陶芒;;压缩空气蓄能电站的比较优势和市场前景[J];今日科技;2006年11期
3 徐玉杰;陈海生;刘佳;谭春青;;风光互补的压缩空气储能与发电一体化系统特性分析[J];中国电机工程学报;2012年20期
，本文编号：2329269
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