A review of the photothermal-photovoltaic energy supply system for building in solar energy enrichment zones

The application of solar PT-PV technology is an important way to achieve clean energy supply and energy conservation and emission reduction in building field. Simultaneously meeting the thermal and electric need of building is one of the main development directions of solar PT-PV energy supply system. The core objective is to build the efficient and stable energy supply system and effectively evaluate their benefit. The major objective of this study was to provide a comprehensive literature review to classify, analyze the performance and evaluate the benefit of different solar PT-PV energy supply system for building. This review summarized the latest research result on solar PT, solar PV, solar PT-PV comprehensive utilization, solar thermal/electric energy supply system based on HES, and the system composition, system characteristic, system optimization and technical innovation were also discussed. Additionally, a detailed discussion was conducted on the efficiency optimization of solar PT-PV energy supply system, as well as the current efficiency situation and the method for improving the efficiency. Sequentially, the economic and environmental benefit evaluation standard and calculation method of solar PT-PV energy supply system was summarized, specifically in terms of operating cost, energy cost, and carbon emission reduction in common building. Finally, the challenge of optimizing the performance for solar PT-PV energy supply system in solar energy enrichment zones was summarized, and the development direction and application prospect of the system in building field was proposed.