Advantages of concrete solid-state thermal storage system From the perspective of construction cost, the thermal storage material of concrete solid-state thermal storage system is mainly concrete, raw material includes cement, gravel and other small amounts of added materials, which does not require expensive and unreliable closed tanks. The integrated heat exchange channel is ordinary water steam pipeline, the overall cost is stable and controllable and has a large proportion of cost advantages over molten salt system. From the perspective of operational safety, the concrete thermal storage system will not occur frozen, over-temperature or over-pressure phenomenon; the entire system will not be overheated, which basically like a simple and safe boiler that will never overheat and never have no smoke erosion; and the daily operating temperature fluctuation range can be controlled within 40 °C after the concrete thermal storage system is put into actual operation, the temperature change rate is very low and it has little impact on the structural strength.