The article reviews the current state of solar thermal energy technologies and their applications for process heating and power generation. The authors discuss the various types of solar thermal systems, including flat-plate collectors, evacuated tube collectors, and concentrated solar power systems. They also highlight the advantages and limitations of each type of system.

The article also reviews the recent advancements in solar thermal energy technologies, including the development of new materials and designs that can improve the efficiency and cost-effectiveness of solar thermal systems. The authors discuss the use of graphene and other nanomaterials to enhance the absorption of solar radiation, as well as the development of new designs for solar thermal collectors and absorbers.

The article also reviews the applications of solar thermal energy, including process heating, power generation, and water treatment. The authors discuss the potential for solar thermal energy to reduce greenhouse gas emissions and mitigate climate change.

The article concludes by highlighting the challenges and opportunities for the development of solar thermal energy technologies. The authors emphasize the need for further research and development to improve the efficiency and cost-effectiveness of solar thermal systems, as well as the need for policy and regulatory frameworks to support the adoption of solar thermal energy.

Overall, the article provides a comprehensive review of the current state of solar thermal energy technologies and their applications, as well as the recent advancements and challenges in the field.