This book explores the potential of solar thermal energy in Biskra, Algeria, a region with one of the highest solar irradiations in the country. It highlights the benefits, challenges, and future prospects of deploying solar heat collectors, which convert sunlight into thermal energy for a variety of applications such as water and space heating, agriculture, food processing, and desalination. The book covers the geographical and climatic conditions of Biskra, the types and performance of solar heat collectors, and their design considerations. It also addresses challenges like dust accumulation and seasonal variability, as well as strategies for overcoming these barriers. The future of solar thermal energy, including technological advancements and policy support, is also discussed. Ultimately, the book provides a comprehensive analysis of how solar thermal systems can contribute to a sustainable energy future in Biskra and beyond.