利用Fluent软件对柔性立管中冷海水泵送时的传热过程进行模拟,确定不同材料管道对冷海水出口温度的影响,同等条件下玻璃纤维增强复合材料管（FRP）的冷海水温度比钢管低近3 K,并基于此分析海洋温差能发电系统的经济效益。以FRP管和钢管作为海水立管,FRP管对应系统的平准化度电成本比钢管低23.78%;利用光伏光热一体化（PVT）系统将温海水温度提高5~20 K,结果发现温度越高,平准化度电成本越低,FRP管对应成本下降25.44%,钢管对应成本下降29.48%,钢管系统的优化效果更明显;分析扩大装机功率对系统的成本优化效果,并将提高热源温度与扩大装机功率两种优化方式结合,确定最优组合系统的平准化度电成本相对原始配置降低近50%。
Abstract
The heat transfer process of cold seawater pumping in the flexible riser was simulated by using Fluent software to determine the influence of different materials on the outlet temperature of cold seawater, and the cold seawater temperature of FRP pipe was nearly 3K lower than that of steel pipe under the same conditions, and the economic benefits of ocean temperature difference energy power generation system were analyzed. With FRP pipe and steel pipe as seawater riser, the levelized LCOE of the corresponding system of FRP pipe is 23.78% lower than that of steel pipe. The PVT system was used to increase the temperature of warm seawater by 5-20 K, and the results showed that the higher the temperature, the lower the levelized LCOE, the corresponding cost of FRP pipe decreased by 25.44%, and the corresponding cost of steel pipe decreased by 29.48%, and the optimization effect of steel pipe system was more obvious. The effect of expanding the installed power on the cost optimization of the system was analyzed, and the two optimization methods of increasing the heat source temperature and expanding the installed power were combined to determine that the levelized LCOE of the optimal combined system was reduced by nearly 50% compared with the original configuration.
关键词
海洋温差能发电 /
保温 /
经济分析 /
平准化度电成本 /
成本优化
Key words
ocean thermal energy conversion /
insulation /
economic analysis /
levelized cost of energy /
cost optimization
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基金
海南省科技专项资金（ZDYF2020207）
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