This project focuses on determining the optimal solar angle for constructing solar photovoltaic systems and solar thermal collectors for pasteurization in El Kharga Oasis, Egypt. The code utilizes equations provided in the solar thermal applications reference and the ASHRAE model. It was developed by Omar Ahmed, Mark Maged, with the assistance of Ahmed Youssef, Ahmed Hesham, and Omar Tarek, under the supervision of Professor Adel Khalil and Dr. Muhammed Abdullah Zidan from Cairo University’s Mechanical Power Engineering Department.