A test system and method for the seepage of molten salt leakage in the foundation of a photothermal power generation heat storage system

Abstract

The invention discloses a test system for the seepage situation of fused salt leaked from a photo-thermal power generation and heat storage system in a foundation. The system comprises a pot body filled with foundation material; a heating plate positioned above the pot body and can be lifted up and down; a temperature control device connected with the heating plate; a crucible placed on the top ofthe foundation material and provided with a leakage hole; multiple temperature sensors inserted into the foundation material, wherein the temperature sensors are spirally distributed along the axialdirection of the pot body at different heights, and used for detecting the depth of the seeped fused salt, the temperature sensors are also circumferentially distributed on the same height, temperature measurement points have different distances with a central axis, and the temperature sensors are used for detecting the width of the seeped fused salt. Based on the test system, the invention also discloses a test method for the seepage situation of the fused salt leaked from the photo-thermal power generation and heat storage system in the foundation. According to the system and method providedby the invention, the seepage situation of the different types of leaked fused salt in the foundation at the different operating temperatures can be measured when the fused salt pot is leaked.

Description

technical field [0001] The present invention relates to the field of seepage control and treatment of leakage of high-temperature molten salt storage tanks in photothermal power generation energy storage systems, and in particular to a test system and method for leakage of molten salt in foundations in photothermal power generation heat storage systems . Background technique [0002] In the application of solar energy, solar heat storage power generation technology has the potential to be dispatched, and it is a renewable energy utilization method with great development potential. In solar thermal power generation technology, through the thermal energy storage device, the excess thermal energy is stored when the solar energy is sufficient, and the stored thermal energy is released when the solar energy is insufficient to meet the power generation demand, and play the role of power buffer and peak shaving and valley filling. The double-tank molten salt indirect heat storage ...

AI Technical Summary

Problems solved by technology

The temperature of the molten salt medium is high, and the temperature distribution of the molten salt medium in the storage tank is uneven, and the change of the liquid level and temperature during the process of filling and discharging salt will cause the thermal expansion of different positions of the molten salt storage tank to be different. As a result, the tank body is subjected to huge thermal stress, which easily causes the tank body to deform, which in turn leads to the rupture of the tank body and the leakage accident of the molten salt tank

[0004] The research on the seepage process of the leaked molten salt in the tank foundation after the molten salt tank leakage accident is extremely lacking. In the existing research, the leaked molten salt is controlled by the leak pool to reduce the harm caused by the molten salt leak, but this is not the case in the site with a diameter of 40m. It is not practical to implement it in the foundation of the storage tank, and it is impossible to determine the seepage of molten salt in the internal foundation. At present, there is no proposal related to the seepage of molten salt in the foundation of the storage tank.

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