A flat-plate solar collector is a device that absorbs solar radiation energy and transfers heat to the working medium. It is a special heat exchanger in which the working medium in the collector exchanges heat with a distant sun. The flat solar collector is composed of a heat absorbing core, a casing, a transparent cover, a heat insulating material and related components. After adding the circulating pipe and the insulated water tank, it becomes able to absorb the solar radiant heat and raise the water temperature.
Flat-plate solar collectors are the basic components of solar low-temperature heat utilization and have been the leading products in the world solar market. Flat-plate collectors have been widely used in many fields such as domestic water heating, pool solar collector, industrial water heating, building heating and air conditioning. A water heater composed of a flat solar collector component is a flat solar water heater. The flat solar collector is mainly composed of a flat solar collector heat absorbing plate, a flat solar collector transparent cover plate, a flat solar collector heat insulating layer and a flat solar collector casing.