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Supercritical CO2 generation system for parallel recuperative type

机译:并联换热式超临界CO2发生系统

摘要

The present invention relates to a supercritical carbon dioxide generation system of a parallel recuperative type capable of enhancing power generation efficiency and reducing costs. The supercritical carbon dioxide generation system of a parallel recuperative type according to the present invention can maximize work of a turbine by increasing a compression ratio of the turbine since recuperators are arranged in parallel. Moreover, the supercritical carbon dioxide generation system can maximize heat exchanging efficiency through distribution of a flow rate since heat transfer temperature distribution among a plurality of heaters and a high temperature part and a low temperature part of the recuperators is uniform. Even if there is a temperature difference of a high temperature fluid outlet between two recuperators, a mixing effect toward the low temperature part is insignificant since the recuperators are arranged in parallel, and there is no risk in operation since a free cooler maintains inlet temperature of a compressor by a flow rate of a cooling source. Furthermore, the supercritical carbon dioxide generation system can reduce costs since UA of a heat exchanger is small when generating the same power in comparison with existing cycles. The supercritical carbon dioxide generation system comprises: a compressor for compressing working fluid; a plurality of heat exchanger for receiving heat from an external heat source and heating the working fluid; a plurality of turbines operated by the working fluid; a plurality of recuperators, which are mounted in parallel and exchange heat between the working fluid passing the turbine and the working fluid passing the compressor and cool the working fluid passing the turbine; and a free cooler for cooling the working fluid first cooled in the recuperators to supply to the compressor.
机译:并联换热型超临界二氧化碳发生系统技术领域本发明涉及一种并联换热型超临界二氧化碳发生系统,其能够提高发电效率并降低成本。由于本发明的并联换热器并联布置,因此根据本发明的并联换热式超临界二氧化碳生成系统可以通过增加涡轮的压缩比来最大化涡轮的工作。此外,由于在多个加热器之间的传热温度分布与换热器的高温部分和低温部分之间是均匀的,所以超临界二氧化碳生成系统可以通过流量的分布来最大化热交换效率。即使在两个换热器之间存在高温流体出口的温差,由于换热器并排布置,朝着低温部分的混合效果也微不足道,并且由于自由冷却器可保持进口温度为零,因此没有操作风险。压缩机通过冷却源的流速。此外,由于与现有循环相比在产生相同功率时热交换器的UA较小,所以超临界二氧化碳产生系统可以降低成本。该超临界二氧化碳生成系统包括:用于压缩工作流体的压缩机;以及用于压缩工作流体的压缩机。多个热交换器,用于接收来自外部热源的热量并加热工作流体。由工作流体操作的多个涡轮机;多个同流换热器,它们并联安装并在通过涡轮的工作流体与通过压缩机的工作流体之间进行热交换并冷却通过涡轮的工作流体。以及用于冷却首先在同流换热器中冷却的工作流体以供应到压缩机的自由冷却器。

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