Improving operational flexibility by regulating extraction steam of
The average power ramp rate, power capacity and energy capacity increase with the increment in the number of throttled valves and/or the degree of feedwater bypass. This
Experimental study on single-unit solid particle packed bed for
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
Performance and economic analysis of steam extraction for
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
Research on influence of steam extraction parameters and
The results show that the proposed steam extraction method can make the unit operate in the lowest stable load and provide a wider renewable energy access space below
Energy, exergy, and economic analyses on coal-fired power
To accommodate high penetration of intermittent renewable power, including wind power and photovoltaic power, coal-fired power plants (CFPPs) are forced to enhance
Design and performance evaluation of a new thermal energy storage
Thermal power plants are required to enhance operational flexibility to ensure the power grid stability with the increasing share of intermittent renewable power. Integrating thermal energy
Research on influence of steam extraction parameters and
The innovation of this research is to use the main steam extraction system to reduce the power output of the CFPP under the minimum stable load, and the heat of the
Performance and economic analysis of a combined heat and
Integrating of steam extraction with heat supply plays a crucial role in enhancing energy system''s stability and economic efficiency. This study focuses on the heat supply
Flexibility improvement method of coal-fired thermal power plant
Based on the energy storage characteristics of the coal-fired power unit, a load regulation method based on the multi-scale energy storage utilization is proposed. The method
China''s First Coal-Fired Steam Extraction Molten Salt Energy
It is the country''s first large-scale energy storage project using multi-source steam extraction and steam distribution control technology. The aim is to improve the power
Study of combined heat and power plant integration with thermal energy
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
Enhancing the flexibility and stability of coal-fired power plants by
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
A steam combination extraction thermal energy storage scheme
The concept integrates the TES system with the 350 MW CFPP by extracting the main steam and the reheat steam to exchange heat with the molten salt to enhance the
Thermodynamic analysis and optimization of a compressed
Compressed carbon dioxide energy storage (CCES) systems are beneficial for power grids as they absorb energy from intermittent renewable energy sources. This study
Design and performance evaluation of a new thermal energy storage
Semantic Scholar extracted view of "Design and performance evaluation of a new thermal energy storage system integrated within a coal-fired power plant" by Kezhen Zhang et al.
Performance and economic analysis of a combined heat and power
By storing energy and shifting its release time, the peak-valley profile of power generation can be adjusted, thereby enhancing the peak-shaving capability of thermal power
Performance of gas turbine multi generation system regulated
In aim to improve system efficiency and flexibility at deep peak-load operation, a novel supply-side load regulation strategy was proposed for gas turbine-based CCHP
Proposal and performance analysis on thermal energy storage
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
Design and performance evaluation of a new thermal energy storage
This work proposes a novel system of molten salt thermal storage based on multiple heat sources (i.e., high-temperature flue gas and superheated steam) integrated within
Improving flexibility of thermal power plant through control
A novel coordinated control strategy, informed by the characteristics of distributed energy storage and power ramping stages of thermal power plants, is proposed.
Dynamic characteristics and economic analysis of a coal-fired power
Improving the peaking capacity of coal-fired units is imperative to ensure the stability of the power grid, thus facilitating the grid integration and popularization of large-scale
Dynamic simulation on the frequency regulation ability
With high penetration of renewable energy, thermal power plants play a key role in peak shaving and frequency regulation for the power grid. In this study, the feasibility of combined heat and
Performance of Molten Salt Thermal Energy Storage System
Performance of Molten Salt Thermal Energy Storage System Based on Reheat Steam Extraction from Coal-fired Power Plants ZHANG Yuheng, SONG Xiaohui, YANG Ronggui, LI Xiaobo
Design and performance analysis of peak shaving mode for coal
With the growing share of renewable energy generation in the power grid system, the flexibility of existing coal-fired units (CFPU) should be improved to keep power grid
Recent Progress on Thermal Energy Storage for Coal-Fired Power
Wei H., Lu Y., Yang Y., et al., Research on influence of steam extraction parameters and operation load on operational flexibility of coal-fired power plant. Applied
China''s First Molten Salt Energy Storage Technology
Recently, China''s first molten salt heat storage replacing electrochemical energy storage technology demonstration project officially started construction at the Anhui Company
Research on influence of steam extraction parameters and
The power output can be reduced to 204.51 MW from 300.03 MW when the main steam extraction mass flow rate is 250 t/h during the load reduction process. The sensible heat
Thermodynamic optimization of coal-fired combined heat and power
The operational flexibility of combined heat and power (CHP) units is highly required owing to the high penetration level of intermittent renewable power. Traditional CHP
6 FAQs about [Yan power unit steam extraction energy storage]
Can steam energy be stored in molten salt and water?
Similarly, data from power plants in Germany and Austria [14, 15] show that transferring steam energy to molten salt and water can achieve storage capacities of up to 1000 MWH, much higher than the working capacity and operating time of steam energy storage.
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 %.
What is a single steam source heating storage strategy?
In the single steam source heating storage strategy, a portion of the live steam enters the preheater and heat exchanger, facilitating sensible heat exchange with cold molten salt. This process converts the cold molten salt into hot molten salt, which exhibits improved liquidity following heat exchange.
How does a single steam source heat storage-release system work?
Figure 2 presents a schematic diagram of the single steam source heat storage-release system. In the single steam source heating storage strategy, a portion of the live steam enters the preheater and heat exchanger, facilitating sensible heat exchange with cold molten salt.
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 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.