Energy Storage Start-up Strategies for Concentrated Solar Power Plants With a Dual-Media Thermal Storage System
Energy Storage Start-up Strategies for Concentrated Solar Power Plants With a Dual-Media Thermal Storage System
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DOI：
10.1115/1.4030851
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发表时间：
2015-10
影响因子：
2.3
通讯作者：
Ben Xu;Peiwen Li;C. L. Chan
中科院分区：
文献类型：
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作者：
Ben Xu;Peiwen Li;C. L. Chan
聚光太阳能发电（CSP）厂通常具有热能储存（TES），这提供了扩展操作和电力调度的优势。使用双介质，TES可以具有成本效益，因为减少了传热流体（HTF）的使用，通常是一种昂贵的材料。本文的重点是在启动期间的热存储策略的CSP工厂的累计电能输出的效果。两种策略-开始与冷存储罐（称为“冷启动”）和开始与一个充满电的存储罐（称为“热启动”）-进行了调查，关于他们的影响，在相同的操作期间的电能生产。针对显热储热系统和潜热储热系统，建立了固体填充材料和热传导材料的一维瞬态储能和温度变化模型。该分析是针对一个发电量为60 MWe的CSP电厂进行的。发现冷启动对于SHSS和LHSS系统都是有益的，因为与热启动相比，在相同天数内的总电能输出更大。研究结果可为CSP双介质蓄热系统的启动操作提供参考。
A concentrated solar power (CSP) plant typically has thermal energy storage (TES), which offers advantages of extended operation and power dispatch. Using dual-media, TES can be cost-effective because of the reduced use of heat transfer fluid (HTF), usually an expensive material. The focus of this paper is on the effect of a start-up period thermal storage strategy to the cumulative electrical energy output of a CSP plant. Two strategies—starting with a cold storage tank (referred to as “cold start”) and starting with a fully charged storage tank (referred to as “hot start”)—were investigated with regards to their effects on electrical energy production in the same period of operation. An enthalpy-based 1D transient model for energy storage and temperature variation in solid filler material and HTF was applied for both the sensible heat storage system (SHSS) and the latent heat storage system (LHSS). The analysis was conducted for a CSP plant with an electrical power output of 60 MWe. It was found that the cold start is beneficial for both the SHSS and LHSS systems due to the overall larger electrical energy output over the same number of days compared to that of the hot start. The results are expected to be helpful for planning the start-up operation of a CSP plant with a dual-media thermal storage system.