OTEC PERFORMANCE AND THERMAL ECONOMY ANALYSIS BASED ON INTERMEDIATE EXTRACTION OF UEHARA CYCLE

Zhu Keyu; Bian Yongning; Liu Yang

doi:10.19912/j.0254-0096.tynxb.2022-1264

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (12) : 393-400. DOI: 10.19912/j.0254-0096.tynxb.2022-1264

OTEC PERFORMANCE AND THERMAL ECONOMY ANALYSIS BASED ON INTERMEDIATE EXTRACTION OF UEHARA CYCLE

Zhu Keyu, Bian Yongning, Liu Yang

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Abstract

Based on the Uehara cycle of temperature difference power generation and considering the climate conditions in the South China Sea, the intermediate steam extraction segment is analyzed with simulation method. The circulating thermal efficiency, the consumption of cold and hot seawater and the circulating exergy efficiency of the power generating system with Uehara cycle are researched. Meanwhile, the Levelized cost of electricity is analyzed. The results show that there is an optimum extraction gas rate for the thermal efficiency and exergy efficiency to reach an optimal level at the same time. And for different intermediate extraction pressure, the extra intermediate extraction rate to reach the best value is different. The cost increases with the extraction rate and is concentrated in the heat exchanger. When building an ocean thermoelectric power plant, the appropriate intermediate extraction pressure and extraction rate should be selected according to the specific working conditions.

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ocean thermal energy conversion / low-temperature heat / economic analysis / Uehara cycle / Aspen Plus

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Zhu Keyu, Bian Yongning, Liu Yang. OTEC PERFORMANCE AND THERMAL ECONOMY ANALYSIS BASED ON INTERMEDIATE EXTRACTION OF UEHARA CYCLE[J]. Acta Energiae Solaris Sinica. 2023, 44(12): 393-400 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1264

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