How solar water heaters work

- Feb 09, 2019-

The sunlight passes through the first layer of glass of the heat absorbing tube to the black heat absorbing layer of the second layer of glass, and absorbs the heat of the solar energy. Since the two layers of glass are vacuum insulated, the heat transfer is greatly reduced. (radiation heat transfer still exists, but there is no heat conduction and heat convection), most of the heat can only be transferred to the water inside the glass tube, so that the water in the glass tube is heated, and the heated water is lightly moved up the heating surface of the glass tube. Entering the insulated water storage tank, the water with relatively low temperature in the barrel enters the glass tube along the backlight surface of the glass tube to be replenished, so that the water in the heat storage water bucket is continuously heated, thereby achieving the purpose of hot water.