Can molten salt heat storage replace electrochemical energy storage?
Recently, China's first molten salt heat storage replacing electrochemical energy storage technology demonstration project officially started construction at the Anhui Company of China Energy's Suzhou Power Plant. It is understood that this project is also currently the world's largest coal-fired unit coupled with molten salt heat storage project.
Can high temperature molten salt thermal energy storage be integrated with CFPP?
The low-carbon energy system has introduced the urgent demand for the ability of peak-shaving for coal fired power plants (CFPPs). A novel and efficient integration concept of the high temperature molten salt thermal energy storage (TES) system with CFPP in the boiler side is proposed in this paper.
How to use heat storage method using main steam?
In general, the heat storage method using main steam requires mixing a certain percentage of water with the steam flowing through the boiler to avoid the problem (1). The reduction of the minimum power load rate after integrated the TES system is confined and varies significantly from different CFPPs.
Does steam extraction cause boiler heat exchange surface over-temperature?
However, a large amount of main steam extraction can lead to boiler heat exchange surface over-temperature. A large amount of reheat steam extraction may lead to turbine thrust problems. None of these schemes solves the safety hazards associated with steam extraction, so they are only applicable to few CFPPs.
How much exergy is transferred by steam at heat exchanger SM2?
The exergy transferred by steam at the heat exchanger SM2 increases from 6.82 MW to 48.74 MW at different steam extraction flow rates m MSE. The exergy transferred by reheat steam at heat exchanger SM1 increased from 2.83 MW to 7.04 MW.
Does reheat steam increase m RSE compared to high-pressure turbine?
So the flow of reheat steam m RH,boiler in the boiler is increased by m RSE compared to the steam flow at the outlet of the high-pressure turbine. The heat transfer flow of reheat steam satisfies the following relationship for the off-design condition of the TES system integration.
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