Coal-fired power unit coupled with electrochemical energy storage

Can molten salt thermal energy storage be integrated with coal-fired power plants?

Although coal-fired power plant has been coupled with thermal energy storage to enhance their operational flexibility, studies on retrofitting coal-fired power plants for grid energy storage is lacking. In this work, molten salt thermal energy storage is integrated with supercritical coal-fired power plant by replacing the boiler.

How to improve the flexible operation of coal-fired units?

At present, there are several ways to improve the flexible operation of coal-fired units: (1) enhancing the control technology of power plants; (2) retrofitting the power generation units; (3) adding thermal energy storage system.

Can thermal energy storage improve the flexibility of coal-fired power plants?

At present, large-scale energy storage technology is not yet mature. Improving the flexibility of coal-fired power plants to suppress the instability of renewable energy generation is a feasible path. Thermal energy storage is a feasible technology to improve the flexibility of coal-fired power plants.

Can heat storage transform coal-fired power plants?

This article provides a review of the research on the flexibility transformation of coal-fired power plants based on heat storage technology, mainly including medium to low-temperature heat storage based on hot water tanks and high-temperature heat storage based on molten salt.

Can coal-fired power plants be retrofitted for grid energy storage?

Grid energy storage is key to the development of renewable energies for addressing the global warming challenge. Although coal-fired power plant has been coupled with thermal energy storage to enhance their operational flexibility, studies on retrofitting coal-fired power plants for grid energy storage is lacking.

What is molten salt energy storage technology?

The design of molten salt energy storage technology coupled with a 1000-MW class coal-fired unit is proposed. The phase-change molten salt and liquid molten salt realizes comprehensive heat recovery from the steam. The operation and economic performance of the coupling system under 14 different schemes is analyzed.