Authors: Rongrong Zhai, Hongtao Liu, Chao Li, Miaomiao Zhao, Yongping Yang
Researchers have explored ways to integrate renewable energy into existing coal-fired power plants in order to reduce fuel consumption and emissions while maintaining reliable electricity production.
This study examines a solar-aided coal-fired power generation (SAPG) system, where solar thermal energy replaces part of the steam extraction process used to heat feedwater in conventional coal plants. By introducing solar heat into the steam cycle, the system allows high-pressure steam to continue producing electricity in the turbine while reducing coal consumption.
Using thermo-economic structural theory, the researchers compare two operational strategies: a fuel-saving mode, which reduces coal use while maintaining output, and a power-boosting mode, which increases electricity generation using the same amount of coal.
The analysis evaluates both the thermodynamic performance and the economic implications of integrating solar thermal collectors into large-scale coal power plants.