M. Salah, M. S. Abd-Elhady, S. A. Ahmed, M. N. El-Sheikh. (2021). Improving the Heat Storage of Evacuated Tube Solar Collectors by Inserting Metallic Strips and Using a Secondary Evacuated Tube. Design Engineering, 2469 - 2481. Retrieved from http://www.thedesignengineering.com/index.php/DE/article/view/7197