The applications of renewable energy sources are an effective way to reduce carbon emissions. However, its intermittent nature presents challenges for large-scale application. Energy storage technology shows great potential in addressing this issue. Thermally integrated pumped thermal electricity storage systems are a promising technology for power storage due to its outstanding role in integrating renewable energy sources. In this work, the pumped thermal electricity storage system incorporates solar energy, utilizing five different working fluids: R1233zd(E), R1336mzz(Z), R123, Pentane, and R245ca. Comparative analyses of the thermodynamic and economic performance of the system under the five working fluid conditions were conducted, followed by multi-objective optimization using genetic algorithm. Additionally, under optimal solution conditions, life cycle assessment analyses are conducted for the system that employs the five working fluids. The results indicate that the performance indexes of the system under different parameter conditions show the variation rule of either increasing or decreasing, and the variation trend of the same performance indexes is basically coincident for different industrial materials. The results of multi-objective optimization show that the power-to-power efficiency of the system has an obvious competitive relationship with environmental impact load and Levelized Cost of Storage, and the larger the value of power-to-power efficiency is, the larger the values of environmental impact load and Levelized Cost of Storage are. Under the optimal solution conditions, the life cycle assessment analysis shows that for the five environmental impact potentials, the percentage of environmental impact potentials is higher in the construction and operation phases, while the environmental impact load has the maximum (4.09 × 10−5 mPE) and minimum (3.94 × 10−5 mPE) values when the system uses Pentane and R1336mzz (Z), respectively. This work can provide a valuable reference for the study of TI-PTES in terms of environmental impact.

中文翻译：

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考虑不同工作流体的集成太阳能抽水蓄热系统的热经济和生命周期评估


可再生能源的应用是减少碳排放的有效途径。然而，其间歇性给大规模应用带来了挑战。储能技术在解决这一问题方面显示出巨大的潜力。热集成抽水蓄热系统因其在整合可再生能源方面的突出作用而成为一种很有前景的电力存储技术。在这项工作中，抽水蓄热系统结合了太阳能，利用五种不同的工作流体：R1233zd(E)、R1336mzz(Z)、R123、戊烷和R245ca。对5种工质工况下系统的热力性能和经济性能进行对比分析，并利用遗传算法进行多目标优化。此外，在最佳解决方案条件下，对采用五种工质的系统进行了生命周期评估分析。结果表明，不同参数条件下系统的性能指标均呈现出增大或减小的变化规律，且不同工业材料相同性能指标的变化趋势基本一致。多目标优化结果表明，系统的发电效率与环境影响负荷、平准化存储成本具有明显的竞争关系，且发电效率值越大，系统发电效率越大。环境影响负荷和平准化存储成本的值为。 在最优解条件下，生命周期评价分析表明，5种环境影响潜力中，建设期和运营期环境影响潜力所占比例较高，环境影响负荷最大（4.09×10−5 mPE）。当系统使用戊烷和 R1336mzz (Z) 时，分别为 ) 和最小值 (3.94 × 10−5 mPE)。本工作可为TI-PTES的环境影响研究提供有价值的参考。