Abstract
this research is aimed at modeling and performing structural analysis on Gravity light system using bond graph method in order to improve its performance. To achieve the bond graph model of the gravity light system, the various subsystems, storage elements, junction structures, transformer elements with appropriate causality assignments and energy exchange that make up the gravity light system were identified and modeled. In the developed model, the effect of friction was considered. 20-Sim software was used to validate the developed bond graph model. The structural design and analysis of the system carried out shows that, it is not just another renewable energy generating source but one that improves greatly, the exiting gravity light system by extended operational time of 40 minutes and higher efficiency of over 80%. Hence, it meets all requirements for the application of renewable energy sources, and technically viable for construction and further developments.
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