Numerical analyses on the feasibility of TC type nozzles in ocean thermal energy Conversion turbines

文献类型： 外文期刊

第一作者： Ma, Qingfen

作者： Ma, Qingfen;Huang, Jie;Luo, Hongfeng;Li, Jingru;Wu, Zhongye;Feng, Xin;Lu, Hui;Ma, Qingfen

作者机构：

关键词： Ocean thermal energy conversion; organic rankine cycle; radial turbine; nozzle profile; off-design

期刊名称：ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS （ 影响因子：2.9； 五年影响因子：2.7 ）

ISSN： 1556-7036

年卷期： 2024 年 46 卷 1 期

页码：

收录情况： SCI

摘要： The turbine is a crucial component in harnessing ocean thermal energy (OTE), and the impact of the nozzle on turbine performance is significant. TC-profile nozzles have been proven to operate efficiently in air turbines under high-temperature and high-pressure conditions. However, their performance in ocean thermal energy conversion (OTEC) turbines using organic working fluids (low-temperature and low-pressure) still requires further research. Therefore, we focused on a practical 100 kW OTEC turbine equipped with different types of TC-profile nozzles. Three-dimensional numerical models were established, and the simulation results demonstrated that the turbine efficiency using TC-3A was generally higher than other turbines, reaching an optimal efficiency of 89.4%. The turbine can operate efficiently at deviations from the design point of + 10.27% or -31.39% in mass flow rate, +/- 3 degrees C in inlet temperature, and + 20% or -11.43% in rotor speed during off-design conditions. The results revealed the adaptability of TC-3A nozzles to the OTEC environment and their excellent off-design performance. The study could provide valuable guidance and references for the application of TC-type nozzles in the field of OTEC turbines.

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