Working process: When the parallel solar beam hits the surface of the parabolic trough, the trough concentrator uses the optical principle of its surface to focus the light on the outer surface of the stainless steel heat collecting tube in the middle. As shown in the figure, the thermal energy is absorbed The selective absorption coating on the outer surface of the heat pipe absorbs, and the working fluid flowing in the heat pipe gradually absorbs the heat on the wall of the pipe along the flow direction, and finally reaches the set temperature at the outlet of the heat pipe, and the system reaches the required temperature difference. The heat is transferred to the heat storage unit by forced circulation. Part of the heat is taken away by the heat transfer working medium in the tube, and the other part is lost to the atmosphere through the heat radiation of the collector body. The whole process is mainly divided into three stages: reflection, penetration, and absorption. The conversion from light energy to heat energy is realized. As the working fluid in the tube continues to absorb heat and exchange heat, the temperature and flow state of the working fluid are constantly changing.