底铰摆式波浪能转换装置实验研究

Experimental Study on Bottom-Hinged Flap-Type Wave Energy Converter

海洋波浪能的开发利用对解决当今社会环境压力、能源危机具有重要的现实意义。通过对一种底部铰接摆式波浪能转换装置的实验,研究装置不同能量转换阶段的效率特点。以电阻负载作为摆板波浪能转换的载体,代替常规动力负载阻尼进行能量吸收;以测量传动链条拉力和位移代替常规测量转轴扭矩和角度计算波浪能功率吸收,并给出由电阻负载换算为动力负载阻尼的公式。结果显示,以电阻为波浪能吸收的负载载体简单有效;摆式波浪能转换装置的一次转换效率较高,中间转换效率相对较低,因此总转换效率表现不是太高。

The development and utilization of ocean wave energy has important practical significance for solving current social environment pressure and energy crisis. Experiments were conducted on a bottom-hinged flap-type wave energy converter for the study of different wave energy conversion phases, including the primary phase, the secondary phase and the final phase. In this study, resistance damping was used for the final phase of wave energy absorption instead of the general dynamic damping types such as the friction damper, the magneto rheological damper and some others. In addition, the traditional way of measuring the torque and pitching angle of the rotating shaft was replaced by a new way of measuring the tension and displacement of the drive chain which was connected to the rotating shaft. Meanwhile, conversion equation between the resistance damping and the dynamic damping was given. Results showed that the new way applied in the present paper was simple and effective; the primary conversion efficiency was high for this type of wave energy converter, while the secondary conversion efficiency was relatively low and thus the final conversion efficiency is not high. Thus, the secondary and final phases of energy conversion should be given more detailed optimization in further studies.