Abstract
For conventional power plants, the integration of thermal energy storage opens up a promising opportunity to meet future technical requirements in terms of flexibility while at the same time improving cost-effectiveness. In the FLEXI- TES joint project, the flexibilization of coal-fired steam power plants by integrating thermal energy storage (TES) into the power plant process is being investigated. In the concept phase at the beginning of the research project, various storage integration concepts were developed and evaluated. Finally, three lead concepts with different storage technologies and integration points in the power plant were identified. By means of stationary system simulations, the changes of net power output during charging and discharging as well as different storage efficiencies were calculated. Depending on the concept and the operating strategy, a reduction of the minimum load by up to 4% of the net capacity during charging and a load increase by up to 5% of the net capacity during discharging are possible. Storage efficiencies of up to 80% can be achieved.
Highlights
The global trend in power generation is to reduce CO2 emissions by expanding renewable energies
The conceptual solutions mentioned there concern TES units as a separation of firing and steam generation and an integrated gasification combined cycle (IGCC) power plant with indirect steam generation via a TES system [7]. Another example is the high temperature thermal energy storage (HTTES) through additional thermodynamic cycle integrated at the boiler of the coal-fired power plant [8]
To identify the lead concepts described below, an evaluation method was developed and applied, which is essentially based on two established management instruments in product development, namely, Quality Function Deployment (QFD) and Failure Mode and Effect Analysis (FMEA) [23,24]
Summary
The global trend in power generation is to reduce CO2 emissions by expanding renewable energies. The conceptual solutions mentioned there concern TES units as a separation of firing and steam generation and an integrated gasification combined cycle (IGCC) power plant with indirect steam generation via a TES system [7] Another example is the high temperature thermal energy storage (HTTES) through additional thermodynamic cycle integrated at the boiler of the coal-fired power plant [8]. Solid media heat storage facilities have already been implemented on a power plant scale in other branches of industry but so far have only been implemented on a pre-commercial basis up to demonstration maturity in the power plant sector itself In addition to these three technologies, which are suitable for large-scale use in power plants Energies 2018, 11, FOR PEER and REVIEW applications inxindustry power plants [13]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
