Principle of molten salt energy storage and heat exchange system

How molten salts are used in thermal energy storage?

The heat from a heat-generating process is transferred to a heat transfer media and can be extracted later using a secondary power cycle. There are several types of facilities that use thermal energy storage with molten salts, such as concentrated solar power plants (CSP plants) or nuclear hybrid energy systems (NHES).

What are the different types of molten salt energy storage systems?

There are two different configurations for the molten salt energy storage system: two-tank direct and thermocline. The two-tank direct system, using molten salt as both the heat transfer fluid (absorbing heat from the reactor or heat exchanger) and the heat storage fluid, consists of a hot and cold storage tank.

Is molten salt a good energy storage medium?

1. Introduction Molten salt is one of the most promising heat transfer and energy storage medium, and the heat exchange between molten salt and supercritical CO 2 (sCO 2) is of great significance for thermal storage system in solar thermal power generation [ 1, 2 ].

How does a molten salt receiver work?

Molten salt in the receiver is heated by solar energy and directed to thermal energy storage or a power cycle. Fig. 4 shows a schematic of a CSP plant containing thermal energy storage systems and a power cycle (U.S. Department of Energy, 2014).

What are molten salt systems?

Molten salt systems involve many radiological and chemistry challenges. Many unique technologies have been designed for molten salt systems. The technology readiness level for power cycle coupling is lower for molten salt systems. The primary uses of molten salt in energy technologies are in power production and energy storage.

Does molten salt retain heat?

Molten salt has excellent heat retention properties, meaning it can be stored for an extended period and retain the solar-generated heat for later use (U.S. Department of Energy, 2014). Fig. 4. CSP plant with thermal energy storage tanks. (U.S. Department of Energy, 2014).