The latest specifications for steam extraction energy storage

What is the maximum cycle efficiency of a retrofitted steam system?

The retrofitted system has a maximum cycle efficiency of 70–80 % with low and peak modulation rates of 16.5 % and 11.7 %. Extraction of main steam dominates the peaking rate and cycling efficiency compared to extraction of reheat steam.

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.

What is a single steam source heating storage approach?

In the single steam source heating storage approach, the sensible heat of high-temperature steam is utilized, while low-temperature steam is discharged into the condenser without further use after heat exchange, leading to increased cold-source losses and a decrease in thermal efficiency.

How does main steam and reheat steam affect tpse?

Main steam and reheat steam are the energy sources for the TES system and turbine power generation, so the extraction of different flow rates of main steam (EMS) and reheat steam (ERS) significantly impacts the heat storage and release processes of TPSE.

What is the maximum heat storage capacity for multi-steam source heating?

In the multi-steam source heating storage mode, the maximum heat storage capacity is elevated to 50 MW, with a peak shaving depth of 13.2%. Notably, the maximum depth of peak shaving under both heating modes is comparable; however, the heat storage capacity is greater in the multi-steam source heating configuration.

Can steam ejector improve waste heat recovery rate?

Zhang et al. studied a thermoelectric system with a 2 × 350 MW thermal power unit coupled with a steam ejector and used the main steam induced discharge steam to provide the heat source to improve the waste heat recovery rate by 8.66 %.