Model research and open sea tests of 100 kW wave energy convertor Sharp Eagle Wanshan

Sheng, Songwei; Wang, Kunlin; Lin, Hongjun; Zhang, Yaqun; You, Yan; Wang, Zhenpeng; Ai-ju, Chen; Jiang, Jiaqiang; Wang, Wensheng; Ye, Yin

doi:10.1016/j.renene.2017.06.019

Cited by 69 publications

(28 citation statements)

References 12 publications

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“…The energy and carbon intensities could reach as much as 968 kJ/kWh and 222 gCO 2 /kWh respectively while the capacity factor decreasing to 20%. Limitations for this study and scope of future work are discussed in the conclusion.Energies 2018, 11, 2432 2 of 15 to absorb wave energy and convert it to electricity or other forms of energy [4]. Since the beginning of the century, tidal stream technology and wave energy technology development have started to ramp up [5].…”

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confidence: 99%

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Life Cycle Assessment of a Buoy-Rope-Drum Wave Energy Converter

Zhai

Zhu

2018

Energies

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This study presents a life cycle assessment (LCA) study for a buoy-rope-drum (BRD) wave energy converter (WEC), so as to understand the environmental performance of the BRD WEC by eco-labeling its life cycle stages and processes. The BRD WEC was developed by a research group at Shandong University (Weihai). The WEC consists of three main functional modules including buoy, generator and mooring modules. The designed rated power capacity is 10 kW. The LCA modeling is based on data collected from actual design, prototype manufacturing, installation and onsite sea test. Life cycle inventory (LCI) analysis and life cycle impact analysis (LCIA) were conducted. The analyses show that the most significant environmental impact contributor is identified to be the manufacturing stage of the BRD WEC due to consumption of energy and materials. Potential improvement approaches are proposed in the discussion. The LCI and LCIA assessment results are then benchmarked with results from reported LCA studies of other WECs, tidal energy converters, as well as offshore wind and solar PV systems. This study presents the energy and carbon intensities and paybacks with 387 kJ/kWh, 89 gCO 2 /kWh, 26 months and 23 months respectively. The results show that the energy and carbon intensities of the BRD WEC are slightly larger than, however comparable, in comparison with the referenced WECs, tidal, offshore wind and solar PV systems. A sensitivity analysis was carried out by varying the capacity factor from 20-50%. The energy and carbon intensities could reach as much as 968 kJ/kWh and 222 gCO 2 /kWh respectively while the capacity factor decreasing to 20%. Limitations for this study and scope of future work are discussed in the conclusion.Energies 2018, 11, 2432 2 of 15 to absorb wave energy and convert it to electricity or other forms of energy [4]. Since the beginning of the century, tidal stream technology and wave energy technology development have started to ramp up [5]. Although there no large-scale WEC installation has been reported in the U.S., the U.S. Department of Energy sponsored the Wave Energy Prize in 2015, an 18-month public design-build-test competition to increase the diversity of organizations involved in WEC technology development, while motivating and inspiring existing stakeholders [6]. The UK and Portugal have the vast majority of wave energy deployments in Europe [5]. The Carbon Trust estimates that a contribution of up to 20% of total UK energy generation could be provided by marine energy by 2050 [7,8]. China possesses a total marine area of 4,700,000 km 2 [9]. With annual mean wave power of up to 7.73 kW/m wave front, China has a wave power potential of 128.5 GW, nearly half of the electricity production of China [10,11]. However, the majority of China's wave energies are without any exploitation and thus far, most of the WECs in China are still in concept design or pre-commercial stages. Aiming to stimulate and encourage the marine renewable energy technology research and development, China National Oceanic Admini...

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confidence: 99%

“…Energies 2018, 11, 2432 2 of 15 to absorb wave energy and convert it to electricity or other forms of energy [4]. Since the beginning of the century, tidal stream technology and wave energy technology development have started to ramp up [5].…”

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confidence: 99%

Life Cycle Assessment of a Buoy-Rope-Drum Wave Energy Converter

Zhai

Zhu

2018

Energies

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“…where N is coil turns, Φ 0 (t) is the fundamental magnetic flux per phase, p is pole number, v is secondary velocity, n is 1, 2, and 3 for U, V, and W phase respectively. The no-load EMF is the time derivative of the flux linkage which is shown in (8). Therefore, the relationship between the no-load EMF peak E 0 , velocity and coil turns is shown in (9).…”

Section: No-load Statusmentioning

confidence: 99%

“…This technology uses the movement of waves to promote the activities of the device (floats, rafts, etc.) [8][9][10]. Among various oscillating body technologies, the point absorption WEC using direct-driven power take-off (PTO)has received much attention [5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Segmented Structure and Control Method for a Permanent-Magnet Linear Generator to Broaden the Range of Efficient Energy Capture

Qiu

Wang

2019

JMSE

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Wave energy, a high-quality renewable energy, is abundant in reserves and relatively stable. However, the wave energy power of the same sea area varies greatly in different seasons. The traditional linear generator cannot work efficiently in such a wide power range. This paper presents a segmented permanent-magnet linear generator structure, which is especially designed for the wave energy converter. This type of linear generator can match the wave energy power by increasing or decreasing the specific primary unit, making the generator more efficient over a wider range of wave power than the traditional type. This paper verifies the correctness by finite element analysis.

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“…In [14] the authors investigated the hydrodynamic characteristics of a sharp eagle WEC, which could be considered that the buoy of the device is almost as same as "Wanshan", and the result shows that eagle head power prime mover has a strong ability to capture wave energy. In [15] the authors systematically introduced the structure, working principle, and experimental data of the sea trial of the device. It can be seen that the buoys of the device have been optimized, but the influence of the central platform on wave energy conversion efficiency of the device has not been mentioned.…”

Section: Introductionmentioning

confidence: 99%

Influence of Central Platform on Hydrodynamic Performance of Semi-Submerged Multi-Buoy Wave Energy Converter

Yang

et al. 2019

JMSE

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The influence of the central platform on hydrodynamic performance of a wave energy converter (WEC) has remained elusive. To approach this dearth of relevant theoretical research, this paper presents a semi-submerged multi-buoy WEC and the results of the numerical analysis at different dimension parameters of the central platform of the WEC. The WEC consists of three oscillating buoys hinged with a central platform through multiple actuating arms. Numerical analysis revealed that there exists a relationship between the hydrodynamic performance of device and the geometry of the central platform. At the given wave condition, different central platform size would obviously affect the hydrodynamic performance and wave energy capture width ratio of the semi-submerged multi-buoy WEC. Additionally, appropriately increasing central platform draft would help to improve the wave energy capture capability of the oscillating buoys.

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Model research and open sea tests of 100 kW wave energy convertor Sharp Eagle Wanshan

Cited by 69 publications

References 12 publications

Life Cycle Assessment of a Buoy-Rope-Drum Wave Energy Converter

Life Cycle Assessment of a Buoy-Rope-Drum Wave Energy Converter

A Novel Segmented Structure and Control Method for a Permanent-Magnet Linear Generator to Broaden the Range of Efficient Energy Capture

Influence of Central Platform on Hydrodynamic Performance of Semi-Submerged Multi-Buoy Wave Energy Converter

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