This book contains selected papers from the 8th International Conference on New Energy and Future Energy Systems (NEFES 2023), which was held from November 21 to 24, 2023 in Matsue, Japan. About 60 participants from 20 countries (including China, Japan, USA, UK, Canada, Australia, India, Pakistan, Egypt, Saudia Aribia, Mozambique, Algeria, Sweden, Philippines, Ghana) attended the conference. The conference program included 3 keynote presentations, 26 oral presentations, and 10 poster presentations.

Twelve peer-reviewed papers were selected from 84 submissions for this book. The topics covered are power system operation, biomass energy, fuel energy, solar energy, thermal energy, energy materials, energy technology, and other related fields. It will be of interest to researchers, engineers, and educators working in the field.

The Organizing Committee would like to extend their gratitude to all the keynote speakers and participants, international reviewers and members of the technical program committee for their dedicated contribution and commitment to the conference.

The Conference Chairs of NEFES 2023