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RISS 인기검색어
- 검색키워드
- 저자 : Olly Roy Chowdhury (검색결과 1 건)
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Wave Energy Harvesting with Enhanced Oscillating Water Column Technology
Olly Roy Chowdhury 순천대학교 대학원 2015 국내박사
The growing consumption of energy is fueled by an increasing population together with its improving living standard and it is consecutively diminishing the resources like oil, coal and natural gas. There is no doubt that renewable energy is the only option left for facing the future energy crisis. The most plentiful solar energy has the drawback that solar cells are very expensive to till date and it is land based mainly which adds cost and reduces efficiency. As a solution to this problem, this study focuses on other renewable source like ocean energy, which is abundant. Oscillating water column technology is frequently used for harvesting ocean or wave energy. But this suffers from performance disruption due to rough ocean weather. As renewable energy is all about using natural resources, and nature is unpredictable totally, so extracting maximum power from any system, in any irregular natural condition is very important otherwise the system will be derailed from its goal of perfection. In light with this, we invented two new wave energy harvester devices for conversion of hydro power into electricity: Closed type OWC and Double Chambered Backward Bend Duct Buoy. This thesis is centered on the modeling, numerical analysis and application of these devices and also a new, improved, adaptive step size maximum power point tracking (MPPT) algorithm is proposed here to extract power at the maximum level of system’s limit. The proposed WECs are ecofriendly, land saving, simple in structure and require less maintenance through their lifetime, thereby being cost effective in many ways. These two devices are expected to be more efficient as compared to other traditional WECs, avoiding the common environmental hurdles that would hamper the normal power extracting activities of the existing OWC or BBDB type WECs. The structural betterments performed in these devices and the upgradation done beyond the traditional MPPT algorithm, are anticipated to work thus. Analysis has been done to study the effect of different scenarios like device sizing parameters, chamber ratios and environmental parameters like wave height and wave period, on the power output of the converter. Result study through MATLAB simulation showed some interesting findings about device sizing and environmental factors which will help in further development and installation of the system. New adaptive step size MPPT algorithm stated here uses least measuring equipment but is faster than other complex algorithms and can be applied in air driven turbine based WECs like OWC or BBDB as well as in standalone wind turbines. The study can have important impact in designing, application and implementation of OWC based wave energy converters as well as extracting power at maximum power point from these. Key Words:Ocean Energy Harvesting, Wave Energy Converter, Closed OWC, Double Chambered BBDB, Adaptive Step Size MPPT Algorithm.
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