Request PDF | Thermo-economic optimization of the thermal energy storage system extracting heat from the reheat steam for coal-fired power plants | The load cycling
A flexible retrofitting method for thermal-energy-storage-coupled thermal power units is proposed. The exergy flow Sankey diagram and efficiency of the three charging
The project adopts a high-temperature and low-temperature dual-tank molten salt energy storage system, using the technology of steam extraction and heating of molten
To assess the economic benefits of these schemes, nine combinations of steam extraction and energy release are analyzed using exergy, thermal efficiency, and output power.
A novel coordinated control strategy, informed by the characteristics of distributed energy storage and power ramping stages of thermal power plants, is proposed.
On April 11, the CHN Energy Hebei Company Longshan Power Plant 600MW fossil - fuel - fired power project with steam extraction and molten salt thermal storage completed all performance
For conventional power plants, the integration of thermal energy storage opens up a promising opportunity to meet future technical
On February 19, the steam extraction and molten salt energy storage project at the Longshan Power Plant''s 600 MW unit, operated by CHN Energy Hebei Branch,
A new thermal power unit peaking system coupled with thermal energy storage and steam ejector was proposed, which is proved to be technically and economically feasible based on the
Direct steam generation (DSG) concentrating solar power (CSP) plants uses water as heat transfer fluid, and it is a technology available today. It has many advantages, but
The results indicate that under heat storage mode, similar peak shaving depths are achieved with both single-steam source and multi-steam source heating strategies.
The experimental data will confirm the feasibility of steam extraction and storage in solid particles for power plants, providing a research basis for predicting the rate and
The load cycling range enlargement of thermal power plants is essential to ensure the power grid stability, which can facilitate the penetration of large-scale renewable
Highlights • A new steam/water hybrid thermal energy storage system was proposed. • Detailed design procedure of the thermal energy storage system was constructed. • The thermal energy
However, the heat source of thermal energy storage system is generally boiler flue gas and high temperature main steam, but limited by the safety of thermal power units,
Nevertheless, existing studies exhibit a critical gap in systematically analyzing the molten salt thermal energy storage integration with 1000-MW class coal-fired power units for
This study tackles the challenge posed by the substantial growth of renewable energy installations in China''s energy mix, which still predominantly relies on coal power for electricity load
In order to provide more grid space for the renewable energy power, the traditional coal-fired power unit should be operated flexibility,
In this study, molten salt thermal storage systems utilizing live and reheat steam as heat sources were proposed, and the steam ejectors were integrated to recover the residual
steam flow requirement for the low-pressure cylinder, steam extraction and peak capacity are constrained, resulting in limited heat storage capacity. The multi-steam source energy storage
By combining the two schemes of steam extraction throttling and feedwater bypass throttling, a load control method for thermal power units with multi-scale utilization of
This study investigated the operational flexibility of coal-fired power plants retrofitted with steam extraction and thermal energy storage. First, a linear operation model is
Thermal power plants are required to enhance operational flexibility to ensure the power grid stability with the increasing share of intermittent renewable power. Integrating
A 600 MW thermal power unit was selected as the experimental system for this work. A sub-critical unit has seven stages of heat recovery steam extraction, including three
The energy storage invocation of different subsystems in the power plant is a cost-effective method, and it can achieve flexibility enhancement of the thermal power plant
Thermal storage Zinc alloy Reflux Heat transfer Solar power Steam A novel reflux heat transfer storage (RHTS) concept for producing high-temperature superheated steam in the temperature
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
When the power grid needs peak shaving, the abundant steam of the boiler is pumped out by steam extraction, and the heat is stored in the high-temperature molten salt
Zhou, Modeling and thermal economy analysis of the coupled system of compressed steam energy storage and Rankine cycle in thermal power plant [J], Energy, № 291
Thermal power generation has rotational inertia and reactive power, which is beneficial for maintaining grid frequency and pressure [3]. It should serve as a guarantee for
Flexible operation of thermal power plants will become increasingly relevant in the coming years. This work evaluates the effect of integrating a steam accumulator into a 598 MW
This study simulated the load ramping up transient processes when throttling the extraction steam of high-pressure heaters. The results show that there is a gap between the
Solid particles instead of molten salt as a heat storage medium for extracted steam energy storage are essential in thermal power flexibility retrofit. This study constructs a
For a combined heat and power (CHP) plant, molten salt thermal energy storage (TES) can be added to improve the flexibility to meet the needs of peak shaving. This paper
