Phase-change self-cooling self-driven type solar tracking system

A phase-change self-cooling self-driven type solar tracking system relates to the technical field of solar photovoltaic. The phase-change self-cooling self-driven type solar tracking system solves the problems that photoelectric conversion efficiency in existing solar photovoltaic technology is low, a tracker employing a motor and being driven by an individually arranged circuit consumes large amount of electric energy, and the photo-thermal utilization rate is low. The phase-change self-cooling self-driven type solar tracking system comprises a pressure cylinder, a pneumatic piston driving mechanism, a phase-change gas pipe, a gas accumulation pipe, a first backflow pipe, a second backflow pipe, a fluid accumulation pipe, a support, a backboard rack and a plurality of micro heat pipes, wherein the micro heat pipes are laid on the back of an inclined photovoltaic cell panels, the upper end of each micro heat pipe is connected with the gas accumulation pipe communicating with each micro heat pipe, the lower en