Nighttime steam energy storage

Is steam accumulator a good energy storage system?

Equivalent energy storage model of steam accumulator is proposed for optimization. An interactive iteration scheme between optimization and simulation is presented. Economic and efficiency performance of the electricity-steam coupled system is evaluated. Steam system plays a crucial role in industrial energy usage.

How is thermal energy stored?

Thermal energy can generally be stored in two ways: sensible heat storage and latent heat storage. It is also possible to store thermal energy in a combination of sensible and latent, which is called hybrid thermal energy storage. Figure 2.8 shows the branch of thermal energy storage methods.

What is a multi-steam source energy storage mode?

The multi-steam source energy storage mode is proposed based on the heat transfer characteristics of molten salt. Compared to the single steam source storage mode, the multi-steam source configuration demonstrates higher heat storage and thermal efficiency while maintaining the same peak shaving capacity during the storage phase.

How does steam storage affect electricity demand?

Similar to the former analysis, the steam storage effect of SAs increases the equivalent steam load during the nighttime. By turning on the EBs at night, the steam load increment can be further converted into an electricity load increment, which raises the nighttime electricity demand by approximately 18.40 %.

How can steam storage and electricity-steam complementarity improve operating economic performance?

In summary, considering the steam storage and electricity-steam complementarity characteristics, the total fuel purchasing cost and wind curtailment penalty cost of Scenario 2 can be reduced, leading to an 11.39 % improvement in overall operating economic performance. Table 5. Economic comparison of optimization results between Scenarios 1 and 2.

How does steam flow into a storage superheater?

The discharged steam flows into the storage superheater (Stream 25), gets superheated by the higher temperature saturated steam (i.e., higher pressure) from the superheating SAs (Stream 26), and then flows into the steam turbine for electricity generation (Stream 28).