This research is aimed to project and develop a method and an apparatus for tracking the sun continuously and automatically without motorized means and electric power.
A particular design of mechanical units is able to mimic the sunflower phototropic natural response for tracking a heat source. The different thermal expansion of various parts facing or shading the heat source induce mechanical motion to the system. The system is controlled and actuated only exploiting the great forces generated by the thermal expansion of structural parts of the system.
A numerical model was developed for asses the yearly and daily heating trend of the Heat Responsive Elements (HRE) externally exposed.
Experimental tests shows excellent agreement with the computer model, encouraging further developments of the system.