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Quantification of realistic performance expectations from trigeneration CAES-ORC energy storage system in real operating conditions
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2021-10-09 , DOI: 10.1016/j.enconman.2021.114828
Hamid Reza Rahbari 1 , Ahmad Arabkoohsar 2 , Mads Pagh Nielsen 2 , Brian Vad Mathiesen 3 , Henrik Lund 4
Affiliation  

Trigeneration compressed air energy storage (TCAES) is one of the emerging solutions that will most likely find its market as a popular energy storage technology for sector coupling. The combination of a TCAES with an organic Rankine cycle (ORC) for waste heat recovery has also been found much effective for enhanced round trip efficiency and is thus to be preferred over conventional TCAES designs. The combined configuration is claimed to offer a very high coefficient of performance (COP) exceeding 1.5. This work aims to quantify realistic performance expectations from a combined TCAES-ORC subject to real operating conditions accompanied for instance by a wind turbine. The system is dynamically modeled, and its performance is analyzed regarding energetic/exergetic efficiency, environment, and economy. To make the investigations close to real-life conditions, a medium-sized 5 MW capacity TCAES-ORC unit is considered integrated with a wind farm for off-peak electricity utilization for storage and tri-generation of heat, cooling, and electricity when charging or discharging. The location of the use case is considered West Denmark, for which wind power production and pricing profiles are available. The results show that there is a considerable collapse in the cooling and power production when the system comes to low operating loads, while heat production potential is not significantly affected. The COP factor decreases from 1.5 in nominal mode to 1.26 in the off-design mode for a sample dynamic load, where the exergetic efficiency is reduced from 64% to 58%. With such a technical operation degradation, the levelized cost of storage (LCOS) is weakened from 141 €/MWh to 153.7 €/MWh, and the potential emission reduction will fall from 4163 to 3640 tonnes of equivalent CO2 per year.



中文翻译:

三代 CAES-ORC 储能系统在实际运行条件下的实际性能预期的量化

三代压缩空气储能 (TCAES) 是新兴的解决方案之一,它很可能会成为一种流行的扇区耦合储能技术。TCAES 与用于废热回收的有机朗肯循环 (ORC) 的组合也被发现对于提高往返效率非常有效,因此优于传统的 TCAES 设计。据称,这种组合配置可提供超过 1.5 的非常高的性能系数 (COP)。这项工作旨在量化 TCAES-ORC 组合的实际性能预期,该预期受实际运行条件的影响,例如伴随着风力涡轮机。该系统是动态建模的,并在能量/运动效率、环境和经济性方面分析其性能。为了使调查接近现实生活条件,考虑将一个中型 5 MW 容量的 TCAES-ORC 装置与风电场集成,用于存储和充电时的热、冷和电三联产的非高峰电力利用或放电。用例的位置被认为是丹麦西部,那里有风电生产和定价概况。结果表明,当系统处于低运行负载时,冷却和电力生产会出现相当大的崩溃,而产热潜力并未受到显着影响。对于样本动态负载,COP 因子从标称模式下的 1.5 降低到非设计模式下的 1.26,此时火用效率从 64% 降低到 58%。有了这样的技术操作退化,每年2次。

更新日期:2021-10-09
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