TAILIEUCHUNG - solar collectors and panels theory and applications Part 4

Tham khảo tài liệu 'solar collectors and panels theory and applications part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 82 Solar Collectors and Panels Theory and Applications The impact of solar panels contribution can be significantly improved by adopting suitable Maximum Power Point Tracking MPPT techniques which role is more critical than in fixed plants. The recourse to an automatic sun-tracking roof to maximize captured energy in parking phases has also been studied Coraggio et al. 2010 II . Moreover as it happens for other hybrid vehicles working in start-stop operation the optimal power split between the internal combustion engine and battery pack must be pursued also taking into account the effect of engine thermal transients. Previous studies conducted by the research group on series hybrid solar vehicles demonstrated that the combined effects of engine generator and battery losses along with cranking energy and thermal transients produce non trivial solutions for the engine generator group which should not necessarily operate at its maximum efficiency. The strategy has been assessed via optimization done with Genetic Algorithms and implemented in a real-time rule-based control strategy Arsie et al. 2008 2009 2010 . In the following all these topics will be discussed with reference to the computational and experimental results presented in published papers and achieved during the on-going research. 2. Automotive applications of solar energy Photovoltaic panels efficiency and cost The conversion from light into direct current electricity is based on the researches performed at the Bell Laboratories in the 50 s where the principle discovered by the French physicist Alexandre-Edmond Becquerel 1820-1891 was applied for the first time. The photovoltaic panels working thanks to the semiconductive properties of silicon and other materials were first used for space applications. The diffusion of this technology has been growing exponentially in recent years Fig. 4 due to the pressing need for a renewable and carbon-free energy REN21 2009 . Fig. 4. Solar PV world capacity .

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