This paper presents an original life cycle assessment (LCA) of a concentrating solar power (CSP) plant with thermochemical energy storage (TCES). The studied CSP plant is a hypothetic solar tower plant with a Rankine power cycle, and the TCES material used is calcium hydroxide. Based on three proposed TCES integration concepts, detailed sizing and the associated emission inventory are performed for four main groups that constitute the CSP plant, including the solar field, the solar tower, the storage system and the power cycle. Various midpoint impact categories are evaluated using the IMPACT 2002+ method embedded in the SimaPro 7.3 software. A sensitivity analysis is performed to identify the most influencing elements of the CSP plant on the environmental impacts. LCA results show that the CSP plant with different TCES integration alternatives has comparable global warming potential (approximately 11 kg CO_2.eq/MWh) and energy payback time (approximately 4 months). The additional environmental burden due to the addition of the TCES system is relatively small (about 30%). The use of calcium hydroxide for the TCES has noticeable midpoint impacts on the respiratory inorganics, the terrestrial ecotoxicity and the mineral extraction. Solar field group (heliostat mirrors) is generally the most sensitive and environmental impacting factor of the CSP installation. The Turbine integration concept has the smallest environmental impacts among the three concepts proposed.

中文翻译：

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集中式太阳能发电厂热化学储能集成概念的生命周期评估

本文介绍了具有热化学能量存储（TCES）的聚光太阳能（CSP）电厂的原始生命周期评估（LCA）。所研究的CSP工厂是假设的太阳能塔，具有兰金（Rankine）功率循环，并且所用的TCES材料为氢氧化钙。基于提出的三个TCES集成概念，对构成CSP工厂的四个主要组（包括太阳能场，太阳能塔，存储系统和电源循环）进行了详细的规模确定和相关的排放清单。使用SimaPro 7.3软件中嵌入的IMPACT 2002+方法评估各种中点影响类别。进行敏感性分析以识别CSP工厂对环境影响最大的因素。_2.eq / MWh）和能源回收时间（约4个月）。由于添加了TCES系统，额外的环境负担相对较小（约30％）。在TCES中使用氢氧化钙对呼吸中的无机物，陆地生态毒性和矿物质提取具有明显的中点影响。太阳场组（定日镜）通常是CSP安装中最敏感且对环境有影响的因素。在提出的三个概念中，涡轮机集成概念对环境的影响最小。