Research progress of solar aided coal-fired power generation (SACPG) system

Solar aided coal-fired power generation (SACPG) is the most efficient and economical technology for reducing coal resource consumption and increasing solar energy efficiency by integrating solar thermal with conventional coal-fired power generation systems. This paper reviews the recent research progress of solar aided coal-fired power generation systems, including integration schemes, analytical methods, optimization methods and engineering applications. Firstly, according to the solar collector type, the integration schemes are categorized into trough, tower, combined trough-tower and non-concentrating flat plate, and the application of energy storage technology in the SACPG system is introduced. Secondly, the performance analysis of the complementary system is introduced including energy analysis, exergy analysis, environmental performance analysis and economic performance analysis, followed by a detailed summary of multiple solar contribution evaluation methods and optimization methods, and an analysis of the principle of each evaluation method. Finally, the current engineering application cases of solar aided coal-fired power stations in the world are summarized, and the outlook for the future development of SACPG system is presented. • Research progress on solar aided coal-fired power generation (SACPG) systems is comprehensively reviewed. • Integration ways for SACPG systems are identified and analyzed. • The solar contribution evaluation methods for SACPG systems are compared. • Practical engineering applications of SACPG systems in the world are summarized. • Directions for further research and technological development of SACPG systems are proposed.