Steam energy storage transformation scheme design

What is the heat storage power of a TES system?

The heat storage power of the TES system during the heat charge process is 106.11 MW. During the heat discharge process, the TES system inputs energy into the CFPP with the heat discharge power of 50 MW, whereas the remaining energy stored in the TES system is equivalently transferred to the CFPP at other periods.

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.

What are the different types of energy storage systems?

Various forms of the concept have been studied, which include (1) pumped thermal electricity storage system [, , , , ]; (2) compressed air energy storage system [, , ]; (3) electrochemical energy storage system [17, 18].

How can a novel integrated system reduce power generation load?

The power generation load of the novel integrated system can be reduced to 16.31 % of the rated load and the equivalent round-trip efficiency can reach 75.38–77.33 %. The relative value of the reheat steam flow rate flowing at the boiler side in the novel system varies from 0 to 16 % under off-design conditions.

What is the design flow split ratio of reheat steam heat transfer?

The design flow split ratio of the reheat steam heat transfer process in the proposed scheme is 53.5 to 46.5. The integration of the heat charge process of the TES system reduces the minimum power load rate of the CFPP to 16.31 % THA, as well as the equivalent round-trip efficiency of the novel system can reach 75.38 %–77.33 %. 3).

What is thermal power conversion efficiency?

In the heat discharge process of the novel system, the CFPP power load has increased for the same coal consumption due to the additional heat load input from the TES system. The ratio of the unit's power output increment PeDc to the energy input Q Dc from the TES system is referred to as the thermal power conversion efficiency.