Mooring Simulation and Experimental Study of a Novel Dual-Impact Horizontal Rotor Wave Energy Converter

Abstract A novel dual-impact horizontal rotor wave energy converter (DHRWEC) system was designed to accommodate the short wave periods and low wave heights that are typical of China’s coastal regions, based on a combination of wave concentration and amplification technology with a four-point catenary mooring system. This study investigates the stability and survivability of the DHRWEC system under actual sea conditions. Numerical simulations and experimental validations are conducted to assess the performance of the system. The results indicate that if even one anchor chain fails under extreme conditions, the safety factor of the remaining chain’s maximum mooring force exceeds three, meaning that it meets international safety standards. The maximum surge and sway displacements are found to be 5.5 m and 3.0 m, respectively, values that align well with predictions from simulations and which confirm stable operation in the designated position. No risk of capsizing is detected, indicating that the system is robust in real sea environments. Sea trials also confirm reliable startup and give an energy conversion efficiency of about 21.33%. These findings offer valuable insights for the development of similar technologies, and provide a solid foundation for the practical application and sustained operation of the system.