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Design and analysis of a dual-receiver direct steam generator solar power tower plant with a flexible heliostat field

机译:具有柔性光晕场的双接收器直接蒸汽发生器太阳能塔厂的设计与分析

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The direct steam generator (DSG) solar power tower plant concept is receiving more attention due to its ability to provide superheated steam without any intermediate heat exchanger and heat transfer fluid. However, the literature on the time-dependent or quasi-static performance evaluation of these systems is limited. In this study, a thermoeconomic assessment of a DSG solar tower with a dual receiver mechanism integrated with a regenerative steam Rankine cycle is carried out. A quasi-static analysis of the system is provided to study the performance of a DSG solar power tower under different operating conditions, i.e. ambient temperature and solar irradiation. To do so, a flexible operation strategy is developed for the heliostat field at which the number of mirrors directed toward the evaporator and superheater is varied to maximize the output of the DSG system. The developed control strategy provides flexibility and improvement in the system's performance in off-design conditions. Thermoeconomic analysis showed that a 50 MWe plant LCOE is 127.7 US$/MWh with an annual solar share of 42.3%. The plant LCOE is reduced to 114.6 US$/MWh by increasing the plant capacity to 150 MWe.
机译:直接蒸汽发生器(DSG)太阳能塔厂概念由于其在没有任何中间热交换器和传热流体的情况下提供过热的蒸汽而受到更多的关注。然而,这些系统的时间依赖或准静态性能评估的文献是有限的。在该研究中,执行具有与再生蒸汽ranaline循环集成的双接收器机构的DSG太阳能塔的热经济评估。提供了对系统的准静态分析,以研究DSG太阳能塔在不同的操作条件下的性能,即环境温度和太阳照射。为此,为朝向蒸发器和过热器指向蒸发器和过热器的镜子的数量来开发灵活的操作策略,以最大化DSG系统的输出。开发的控制策略提供了系统在非设计条件下系统性能的灵活性和改进。热经济学分析表明,50米厂植物LCoE为127.7美元/毫安,年度太阳份额为42.3%。通过将植物容量增加到150 mWe,植物LCoE减少到114.6美元/毫安。

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