Vertical-type phase-change thermal storage tank

Abstract

The invention relates to the technical field of solar photo-thermal electric power generation, and discloses a vertical-type phase-change thermal storage tank. The vertical-type phase-change thermal storage tank comprises a vertical-type thermal storage tank body, multiple thermal storage material encapsulation bodies, a multi-hole dense distribution spray device and a phase-change thermal exchange device; the thermal storage material encapsulation bodies are used for encapsulating a phase-change thermal storage medium and vertically and densely arranged inside the thermal storage tank body, the phase-change thermal storage medium is used for thermal storage or thermal release, the multi-hole dense distribution spray device is arranged above the thermal storage material encapsulation bodies and used for spraying the phase-change thermal exchange medium, and the phase-change thermal exchange device is arranged above the multi-hole dense distribution spray device. According to the vertical-type phase-change thermal storage tank, the structure is more stable, the filling rate is higher, and the manufacturing cost is lower.

Description

technical field [0001] The invention relates to the technical field of solar thermal power generation systems, in particular to a vertical phase change heat storage tank. Background technique [0002] At any point on the earth, due to cloud cover or at night, the supply of solar energy is discontinuous. In order to ensure that the solar power generation system does not impact the power grid when there are clouds or at night, the solar energy whose radiation intensity varies greatly throughout the day is converted into constant electrical energy, and the solar power generation system becomes a dispatchable energy source like a traditional power generation system. Technology is crucial. [0003] According to different thermal energy storage methods, the current high-temperature solar heat storage technology in the world can be mainly divided into sensible heat storage and latent heat storage. Among them, double-tank molten salt heat storage is a relatively mature and commerc...

AI Technical Summary

Problems solved by technology

However, the heat transfer difficulties of phase change heat storage technology and the stress problems caused by the volume change of materials during the phase change process have been difficult to solve.

The forced convection heat transfer of heat transfer fluid is adopted in the world. This technology has disadvantages such as uneven heat transfer temperature, large flow rate changes of heat transfer fluid during charging and discharging, difficult control, complex heat transfer process, and difficult modeling.

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