A composite heat absorber of high temperature air and molten salt

Abstract

The invention relates to a high-temperature air and molten salt composite heat absorber comprising a porous-structure heat absorber (1), a heat exchange cavity (8), a heat pipe (7) and a molten salt heat absorption pipe (2), wherein the porous-structure heat absorber (1) is arranged at a daylight opening of the high-temperature air and molten salt composite heat absorber (13); the molten salt heat absorption pipe (2) and the heat pipe (7) are respectively located in upper and lower cavities of the heat exchange cavity (8); one end of the heat pipe (7) is located in the lower cavity of the heat exchange cavity (8); the other end of the heat pipe (7) is inserted in an inner pipe of the molten salt heat absorption pipe (2); and the end of the heat pipe (7), located in the inner pipe of the molten salt heat absorption pipe (2), is provided with fins. In the invention, the molten salt heat absorption pipe (2) adopts a sleeve structure; molten salt circulates in the inner pipe and high-temperature air circulates in an interlayer (9) between inner and outer pipelines; the heat exchange cavity (8) and the interlayer (9) between inner and outer pipelines are communicated by utilizing a fanduct (5); and the make-break is controlled by a heat tracing valve (6).

Description

technical field [0001] The invention relates to a high-temperature heat absorber for a solar tower thermal power station, in particular to a high-temperature air and molten salt composite heat absorber. Background technique [0002] In the existing various tower-type solar thermal power generation test stations, the heliostat system and the power generation system are basically the same, and the only difference is the heat absorption and heat transfer system. Among various heat absorption and thermal energy transfer systems, the most commercial potential and the most researched are molten salt system, air system and saturated steam system. Using molten salt as the working medium of the heat absorber, the system can operate under normal pressure and improve safety; the heat transfer working medium has no phase change in the entire heat absorption and heat transfer cycle, and the heat capacity of molten salt is large, and the system is easy to achieve large capacity Heat stor...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of large thermal stress in the pipes of the molten salt heat absorber in the prior art and the need for electric heat tracing and power consumption, and propose a high-temperature heat absorber constructed by combining air and molten salt

Images