Supercritical Carbon Dioxide and Air Combined Cycle Efficiency Analysis

Kaiyun ZHENG

doi:10.16513/j.cnki.10-1427/tk.2019.01.002

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Distributed Energy ›› 2019, Vol. 4 ›› Issue (1) : 8-12. DOI: 10.16513/j.cnki.10-1427/tk.2019.01.002

Basic Research

Supercritical Carbon Dioxide and Air Combined Cycle Efficiency Analysis

Kaiyun ZHENG

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Abstract

Supercritical carbon dioxide (sCO₂) closed cycle is suitable for coal-fired distributed power generation. It can adopt shunting-recompression cycle, but it still has some shortcomings for the improvement of efficiency. A combined cycle of sCO₂ closed cycle and air closed cycle is proposed. The top cycle of the combined cycle adopts an efficient air closed cycle. The efficiency of sCO₂ and air combined cycle and shunting-recompression sCO₂ closed cycle was analyzed and compared. The results show that the efficiency of the sCO₂ and air combined cycle can significantly exceed that of the shunting-recompression sCO₂ closed cycle, and its efficiency for distributed generation can reach the level of large-scale ultra-supercritical coal-fired power plant.

Key words

supercritical carbon dioxide (sCO₂) closed cycle / air closed cycle / combined cycle / efficiency analysis / distributed power generation

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Kaiyun ZHENG. Supercritical Carbon Dioxide and Air Combined Cycle Efficiency Analysis[J]. Distributed Energy Resources. 2019, 4(1): 8-12 https://doi.org/10.16513/j.cnki.10-1427/tk.2019.01.002

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