Preliminary design and performance analysis of a radial inflow turbine for ocean thermal energy conversion
Preliminary design and performance analysis of a radial inflow turbine for ocean thermal energy conversion
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DOI：
10.1016/j.renene.2017.01.038
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发表时间：
2017-06
期刊：
影响因子：
8.7
通讯作者：
Do-Yeop Kim;You-Taek Kim
中科院分区：
文献类型：
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作者：
Do-Yeop Kim;You-Taek Kim
海洋热能转换是利用表层海水与深层海水之间的温差发电的有机朗肯循环。海洋热能潜力巨大，是一种环境友好的电力系统。但由于表层海水与深层海水温差较小，其热效率很低。因此，开发高效涡轮机以提高海洋热能转换的热效率至关重要。高效径流式涡轮机的精确初步设计需要选择适当的流量和载荷系数以实现目标效率。本研究提出了一种适当选择流量和载荷系数的新方法。对设计的涡轮机进行了等线分析和三维粘性模拟，以验证设计和非设计条件下提出的方法。结果表明，通过应用所提出的模型，可以设计出适合设计条件的最佳径流式涡轮机。
Ocean thermal energy conversion is an organic Rankine cycle for generating power using the temperature difference between surface seawater and deep seawater. The potential of ocean thermal energy is significant, and it is an environmentally friendly power system. However, its thermal efficiency is very low due to the low temperature difference between surface seawater and deep seawater. Hence, it is essential to develop a high efficiency turbine in order to improve the thermal efficiency of ocean thermal energy conversion. The precise preliminary design for the high efficiency radial inflow turbine requires selection of the appropriate flow and loading coefficients for the target efficiency. A new approach for the appropriate choice of flow and loading coefficients is proposed in this study. The meanline analysis and three-dimensional viscous simulations for the designed turbine are conducted in order to verify the proposed approach in design and off-design conditions. The results demonstrate that the optimum radial inflow turbine for the design conditions can be designed through applying the proposed model.