The Use of Half Circular Unit (Dish 1) to Heat Water By Solar Energy

The research aims to design a modern solar heater, which can be used for easy manufacturing, transporting and cleaning. It is highly efficiency to heat water with low cost, and it works in different environments. The concave shape is chosen to be the basic structure of heater which is called (D1) (Dish 1), the mirrors are used to reflex the sun radiation to the copper pipe inside (D1) in order to heat the water that passes through it. The shape of D1 makes installing the glass panes on the front, against the sun easily in order to create global warming inside D1, to increase temperature of copper pipe. Throughout heat exchange, the temperature of water increases. The concave dish (Dish 1), glass panes, copper pipe and reflexive mirrors, girder of aluminum, black paint, valve and adhesive material are used in the project and a thermometer is used to measure the temperature. The project was tested from January – 2017 to May- 2018 and from January -2018 to May -2019. D1 is in vertical shape at the solar radiation, to gain the heat during the day time (direct radiation – reflection of mirrors – global warming). The experimental results explain that D1 works in high efficiency and stability. The temperature of water is (60 – 97 Cº) with fixed flow (160 mlmin) during the day which means (105.6 L) of multi-use hot water. The temperature of water's tank (

)which keeps the hot water is (60-70 Cº). D1 works during the cloudy and the partially cloudy weather and the temperature of water is (50-70 Cº).