Design and optimization of a solar water heater

The aim of this modest work is to optimize the efficiency of a solar water heater by using a different type of solar collector. Instead of installing a flat plate collector we're going to replace it with an evacuated tube collector to increase the efficiency of the system and the optimum angle during the year.a vacuum tube collector to increase the yield of the installation and the optimal angle during the year because the solar thermal collector is a device and very important element in solar installations.very important element in solar systems.