Investigation to increase the hot water supply from an evacuated solar collector   with the presence of a tank containing Aluminium tubes numerically

Since time immemorial, solar radiation has been used to hot water in domestic applications. In this study, simulation was used to determine the effectiveness of the water tank and its effect on the time and quantity of hot water supply. The simulation process done by using ANSYS fluent, for a water storage tank, where the water pipe was used as part of the physical process within the simulation program, and thus four types of thermal storage were used, the first without tubes and the second using a variable number of tubes (4, 6, 8) in thermal storage. In addition, three flow rate values were used, (4, 6, 8) L/m and solar radiation rates (437-630) W/m2 for the 31 days of January and the days (7,12,13,17,18) of the February. The results showed that the tank temperature increased as the flow inlet rate decreased. At 4 L/m, the temperature in storage rose to 42 °C at 12 Am, while at 6 L/m, the temperature rose to below 39 °C. Introducing water pipes inside the storge tank enhances heat accumulation and heat dissipation ability. Temperature peaks were recorded at 45°C using 8 water tubes and a flow rate of 4 L/m.