جستجوی مقالات مرتبط با کلیدواژه "point absorber" در نشریات گروه "فنی و مهندسی"

Increasing the performance of offshore platforms is one of the main aims of the designers. The oil and gas offshore platforms encounter some challenges as the dynamic vibrational response that they always attempt to improve the stability and response of the platforms. On the other hand, many electronic devices on the platform require a supply resource. The transmitted energy of the excited waves into the mechanical vibrations for the platform may be captured by installing some types of WECs. The present study conducts a numerical study on the hydrodynamic analysis of the platform attached with four-point absorber wave energy converters underneath the Amir Kabir semi-submersible platform. The monochromatic regular waves are considered the excitation forces based on the Caspian Sea state. Two different arrangements of WECs and three sizes of sphere buoy are also considered. In addition to calculating the produced power via WECs, the overall performance of the single and integrated platforms is compared from the dynamic response point of view. The results show a considerable difference in the responses of the platform when the WECs are combined. However, the captured power does not depend on the locations of the WECs but is affected by the buoy size of the WECs while the platform response is dependent on the buoy size and also the WECs’ arrangement.

Nowadays , sea wave energy is widely regarded as an energy source that is clean, renewable and highly available for power extraction. The subject of extracting the maximum power from sea wave s in Iran is of great importance due to access to the Caspian Sea and the Pe rsian Gulf . Moreover, the re is a need for resources with no air pollution besides providing a part of the country 's power demand without costly infrastructure, so this research field is highly interesting although has rarely been addressed so far. The main purpose of this paper is to use an appropriate control strategy to improve the performance of point absorbers. In this scheme, to consider high uncertainty in the parameters of the power take - off system in different atmospheric conditions and impr ove controller performance, a new improved black hole algorithm is introduced to tune fuzzy controller parameters . The proposed method is then implemented for tuning the fuzzy controller parameters in order to obtain the maximum power capture of wave energ y converters. Compared to particle swarm optimization and conventional black hole algorithm, the results of the proposed method indicate enhancements in reference velocity tracking and absorbed power. Finally, some simulations are performed and the propose d controller is implemented for the wave spectrum of the Persian Gulf waters, so the performance of the proposed controller is evaluated .