Solar radiation through the glass cover, is absorbed by the collector and the wall along the fin tube is passed to the heat-absorbing water. Endothermic endothermic pipe after the water temperature, decreasing the proportion rose to form an upward impetus to form a thermal siphon system. Move with the constant hot water and stored in the tank top, while circulating through the tube under low temperature of the water constantly added, so the cycle, the final FCL are elevated to a certain water temperature. Existing Flat-Plate Collector, basically by combining a good combination of multiple methods, such as rolling or pressing methods, which take the water between the child and the endothermic board thermal resistance is almost negligible. Solar Water Heater impact of flat plate collector core performance of the main factors, one structural design, and second, the surface absorption coating. Well-designed collector's plate with fin efficiency should be 93%. Collector plate efficiency and plate fin core core structure, surface treatment and the overall structure of the collector. Collector overall structure of the overall heat transfer coefficients can be described, its influence with its own geometric dimensions (rib thickness, material) is the same. That is, in the case of equal efficiency, collector plate core heat loss an hour can be thinner. Selective absorption of the surface can improve the collection efficiency, but the market these products to enhance economic efficiency, often thin fin.

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