A financial model for lithium-ion storage in a photovoltaic and biogas energy system
A financial model for lithium-ion storage in a photovoltaic and biogas energy system
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光伏和沼气能源系统中锂离子存储的财务模型
DOI：
10.1016/j.apenergy.2019.04.175
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发表时间：
2019
期刊：
影响因子：
11.2
通讯作者：
Lai C
中科院分区：
文献类型：
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作者：
Lai C
诸如锂离子（Li-ion）电池的电能存储（EES）可以减少可再生能源的削减，通过存储剩余电力来最大限度地利用可再生能源。已经对EES进行了一些技术经济分析，但很少对财务绩效进行调查。本文提出了一种最先进的财务模型，当应用于锂离子电池时，获得了新颖且有意义的财务和经济结果。这项工作是向前迈出的重要一步，因为传统的经济环境系统分析是基于过于简化和不切实际的经济模型。介绍了锂离子电池的贴现现金流模型，并将其应用于检查三种电池运行方案的财务业绩。现实生活中的太阳辐照度，负载和零售电价数据从肯尼亚被用来开发一套案例研究。EES与光合作用和厌氧消化沼气发电厂相结合。结果显示了资本成本的影响：锂离子项目在肯尼亚是无利可图的，资本成本为1500 $/kWh，但在200 $/kWh时是有利可图的。该研究表明，尽管由于降解而缩短了寿命，但如果更频繁地循环使用，EES将产生更高的利润（因此具有更高的寿命电力输出）。
Electrical energy storage (EES) such as lithium-ion (Li-ion) batteries can reduce curtailment of renewables, maximizing renewable utilization by storing surplus electricity. Several techno-economic analyses have been performed on EES, but few have investigated the financial performance. This paper presents a state-of-the-art financial model obtaining novel and significative financial and economics results when applied to Li-ion EES. This work is a significant step forward since traditional analysis on EES are based on oversimplified and unrealistic economic models. A discounted cash flow model for the Li-ion EES is introduced and applied to examine the financial performance of three EES operating scenarios. Real-life solar irradiance, load, and retail electricity price data from Kenya are used to develop a set of case studies. The EES is coupled with photovoltaics and an anaerobic digestion biogas power plant. The results show the impact of capital cost: the Li-ion project is unprofitable in Kenya with a capital cost of 1500 $/kWh, but is profitable at 200 $/kWh. The study shows that the EES will generate a higher profit if it is cycled more frequently (hence a higher lifetime electricity output) although the lifetime is reduced due to degradation.