Forced flow mixing technology and device for solar photo-thermal power generation energy storage tank body

Abstract

The invention relates to a forced flow mixing technology for a solar photo-thermal power generation energy storage tank body. When the solar photo-thermal power generation energy storage tank body is filled with a heat storage medium, inert gas protection systems fill up inert protection gases into the energy storage tank at the same time, the energy storage medium exchanges heat or passes through a heating system and is filled into the energy storage tank body through a pipeline and an automatic control three-way valve on the pipeline, at the time, the energy storage medium forms a flow mixing vortex in the energy storage tank body through a flow mixing nozzle at the bottom of the energy storage tank body so as to perform uniform flow mixing on the energy storage medium in the energy storage tank body. The forced flow mixing technology is efficient, economic and easy to maintain, effectively solves the problems of temperature stratification and non-uniform heat storage temperature of the phase change energy storage medium in the solar photo-thermal power generation energy storage system, and greatly improves the running stability of the system.

Description

technical field [0001] The invention relates to the technical field of solar photothermal power generation energy storage, in particular to a technology of forced mixed flow in a solar photothermal power generation energy storage tank and a device thereof. Background technique [0002] The solar thermal power generation energy storage system must have an energy storage medium for high-temperature heat storage. The energy storage medium is generally molten salt or other phase change materials. These heat storage mediums have high melting latent heat and high requirements for a specific temperature (melting point). For special reasons, the liquid surface temperature of the heat storage medium in the energy storage tank and the temperature at the bottom tend to form a temperature gradient difference, which makes the heat storage of the system uneven. [0003] The traditional solution is to use electric heat tracing around the tank wall for heating, and use natural convection to...

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Problems solved by technology

[0002] The solar thermal power generation energy storage system must have an energy storage medium for high-temperature heat storage. The energy storage medium is generally molten salt or other phase change materials. These heat storage mediums have high melting latent heat and high requirements for a specific temperature (melting point). For special reasons, the liquid surface temperature of the heat storage medium in the energy storage tank and the temperature at the bottom tend to form a temperature gradient difference, which makes the heat storage of the system uneven. In severe cases, condensation and solidification will occur at the bottom, which will affect the stability of the entire solar thermal power generation system.

[0003] The traditional solution is to use electric heat tracing around the tank wall for heating, and use natural convection to balance the temperature. However, due to the low efficiency and poor effect of natural convection, the above problems cannot be fundamentally solved. In addition, electric heat tracing uses And maintenance costs are high, life is low, not conducive to large-scale use

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