| abstract |
(57) [Summary] [PROBLEMS] To provide a solar heat storage system capable of storing a large amount of solar energy more efficiently than in the past. SOLUTION: The heat collecting lens 11 is provided so as to be able to receive the heat collected through the lens 11 and contains a medium oil having a specific gravity of 1 to 2.5 g / cm 3 . A heat vessel 12, a circulation path of a medium oil including an oil oil supply pipe 22, a supply pipe 12b, and a return pipe 12a, and a heat storage oil 26 provided in the middle of the circulation path and exchanging heat with the medium oil and surrounding the same. The solar heat storage system 1 includes a heat storage tank 20 having a heat insulating material 24 and a heating oil passage 21 through which heating oil flows. Heating oil Heat is heated by the heat storage oil 26 inside the heat storage tank 20 and flows to the outside, and the water is heated in the heat exchanger 30. |