What materials are used to make a simple solar water heater?

Materials for the solar water heater: box (preferably an iron box), small tin can (must be metal), foam, reflective plate (aluminum foil from cigarette boxes , mirrors, old CDs can be used), adhesive tape, black paint, cellophane.

Stainless steel is not rust-free. Water used for a long time in stainless steel clad solar water heaters contains a large amount of rust-soluble heavy metal salts. In addition, it contains a large quantity. of rust-soluble heavy metal salts, it is easy to form knots on the inner tank. White deposits should be replaced or cleaned regularly with acetic acid.

The two most common types of water heater linings on the market are ordinary stainless steel and food grade stainless steel, and ali grade stainless steelmentary imported using the latter can meet consumption needs, but it is ordinary. stainless steel cannot.

Detailed information:

< p> Working principle: Sunlight passes through the first glass layer of the heat-absorbing tube and shines on the black heat-absorbing layer of the second glass layer, absorbing the heat of solar energy since the two layers of glass are. vacuum insulated, heat transmission will be greatly reduced (radiation heat transfer still exists, but there is no heat conduction or heat convection), and most of the heat can only be transferred 'to the water in the glass tube, heating the water in the glass tube.

The heated water will flow upward along the heating surface of the glass tube and enter the water storage bucketu isolated. The relatively low temperature water in the bucket will enter the glass tube along the backlit surface of the glass. tube for replenishment. In this continuous cycle, heat conservation. The water in the water storage barrel is continuously heated to achieve the hot water target.

1. Materials: boxes (preferably iron boxes), small cans (must be metal), foam, reflective boards (aluminum foil from cigarette boxes, mirrors and CD scraps can be used). ) ...), adhesive tape, black paint, cellophane.

2. Boxes and small cans should be painted black (this can absorb more heat). Dig a hole in the foam (also painted black) that can be inserted vertically into 3/5 of the small can. ((to retain heat), 2/5 are exposed to the outside to receive sunlight. Put the mosse and the small box in the box, seal it with cellophane and make a support frame behind the box so that the box can stand tilted. towards the sun. Behind the box, above, install reflectors on the left and right sides. The lower reflector can be placed directly on the ground in front of the box (the larger the reflector, the better the reflected light). to illuminate the box or small box, so that the box and the box can absorb more light. A simple solar water heater is made.