A master’s thesis by student Mortada Hamid Aziz was discussed at the University of Basra, College of Engineering, Department of Mechanical Engineering, entitled Improving the Productivity of the Solar Still by Using Recycling Waste Heat from the Air Conditioning Unit. The current work research includes the performance of an active solar still with a single slope and a single basin using a heat recovery system expelled to the air. Aerial. The source of waste heat is the hot air exhausted from the air conditioning unit's condenser into atmospheric air. The heat recovery unit is designed with two types of heat exchangers. The theoretical and experimental results were estimated according to the climatic conditions of the city of Nasiriyah, located in southeastern Iraq, during the summer. The MATLAB program was used to estimate theoretical productivity and compare it with practical results. Tests were carried out practically, and the working day was divided into day and night. During the day, the only heat source for the solar distillation system was solar radiation (Case 1) (without heat recovery), while throughout the night, the only heat source was the ambient waste heat recovery unit (Case 2) (with heat recovery).
The researcher concluded that the experimental results of hourly and cumulative productivity are better than the theoretical results because the practically measured solar intensity is higher than the theory. Therefore, it resulted in the measured raw water temperature being higher than its rated value