Device for performance testing of molten salt heat exchange/accumulation equipment

Abstract

The invention discloses a device for performances testing of molten salt heat exchange / accumulation equipment. The device comprises a high-temperature molten salt circulation loop and a cascade cooling system (a heat conduction oil circulation loop and a cooling water circulation loop). By utilizing a mode of combined adjustment of a variable frequency pump, a valve and a bypass line, it is guaranteed that flow of a working medium is adjusted accurately in a large range. By arranging multiple groups of electric heaters and by utilizing a mode of automatically adjusting power through a silicon controlled rectifier, the heating power and temperature can be adjusted accurately in a large range. By introducing nitrogen, molten salt and heat conduction oil can be prevented from being in contact with the air, and the service lives of the molten salt and the heat conduction oil are greatly prolonged. A molten salt heat exchange / accumulation performances testing comprehensive experimental platform has multifunctional characteristics, not only is suitable for testing flow, heat exchange and heat storage performances of the molten salt working medium, but also can be popularized to other liquid working mediums.

Description

technical field [0001] The invention belongs to the technical field of molten salt heat exchange and relates to a performance test device for molten salt heat exchange / heat storage equipment. Background technique [0002] Molten salt has the characteristics of wide temperature range, good thermal stability, low vapor pressure, large heat capacity, strong solubility for substances, and low viscosity; at the same time, the price of molten salt is relatively cheap. These characteristics make molten salt a heat transfer / storage fluid with broad application prospects, and is widely used in many fields such as metallurgy, chemical engineering, nuclear power, and solar energy. Especially in the fields of nuclear power and solar energy, molten salt is one of the most promising heat transfer and heat storage media. At present, there are large-scale molten salt solar power plants on a commercial scale in the world. [0003] Compared with conventional heat transfer and heat storage f...

AI Technical Summary

Problems solved by technology

Moreover, the cost of the experimental platform is very high

[0004] Although there are some experimental platforms for molten salt performance testing, the experimental system is relatively simple, and the flow range of the system is small (the maximum flow rate is less than 2m 3 / h)

The types of molten salt heat exchange or heat storage equipment that can be tested on the experimental platform are limited. For example, only small-scale experimental tests such as single tubes and simple sleeves can be carried out, and it is difficult to realize some integrated heat exchange or heat storage equipment with larger flows. Performance Testing

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