The effect of porous media on the hot water solar collector enhancement

• Main Authors: Sadaa, Khalil Lafta Abdul, Kadhim, Zena Khalefa, Habeebb, Laith Jaafer
• Format: Conference Proceeding
• Language: English
• Subjects: Flow velocity; Hot water heating; Porous media; Tubes
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0212641

In this study, a solar water heater consisting of an evacuated tube-type solar collector with 20 tubes and a thermally insulated tank with a capacity of 120 liters was used. A 50 L thermally insulated porous media tank was added and 10 mm diameter glass balls were placed inside representing the porous media. Practical experiences were conducted to study the effect of the porous medium on increasing the time of supplying hot water. of several heights of porous media (0 mm, 150 mm, 300 mm, and 450 mm) and at different flow rates (2, 4, 6, and 8 L/min). The results of practical showed that the addition of porous media increases the time of supplying hot water, as the time of supplying hot water increases with the increase of the level of porous media in the tank. It was found from practical experiments that for a flow rate of 2 l / min, the time for supplying hot water without the use of porous media was 92 minutes, and when using porous media with a height of 150 mm, the time required to supply hot water increased to 96 minutes, and at a height of 300 mm, the time was 102 minutes for a height of 450 mm was 110 minutes, and this applied to other flow rates. The results of the daily efficiency of the solar collector showed that it increases with the increase in the level of the porous medium and for all flow rates (2, 4, 6, 8) l/min.