Take a drink can and spray it with black paint. Put it in the sun, it is the simplest and most primitive solar water heater.
Method 1: Use a drink can and spray it with black paint. Placed under the sun, it is the simplest and most primitive solar water heater.
Method 2: 1. Fill a plastic bottle (preferably a beverage bottle) with an appropriate amount of water.
2. Prepare some mirrors.
3. Place mirrors around the plastic bottles and place them in the sun to heat the water using the reflection principle.
The solar water heater is a heater that converts solar energy into thermal energy, thereby transforming water at low temperatures. Heated to high temperatures to meet people's use of hot water in life and production.
What materials are needed to make a water heatersolar?
Materials to prepare: 1 cardboard, 1 piece of aluminum foil, foam, mirror, 1 glass test tube, brush and ink.
Production steps:
1. Cover the inside of the cardboard with a layer of foil. The function of aluminum foil is to absorb solar energy:
2. Place 1 The test tube filled with water is fixed on the aluminum foil with double-sided tape, and foam can be used on both sides to help secure it:
3. Attach a mirror to the test tube filled with water. center of the side wall of the box to reflect sunlight:
4. Use a brush dipped in ink to paint the tin foil, foam, etc. in the black box to help absorb energy from the sun:< /p>
5. After final production is completed, place it in the sun. Yes, a simple solar water heater was produced:
Rigid polyurethane foam
.The foamRigid polyurethane is polymerized from isocyanate and polyol as basic raw materials. Microporous foam with dense structure has excellent properties such as light weight, high specific strength, waterproof, non-hygroscopic, insulating, shockproof, sound-absorbing, oil-resistant. and chemical resistant; compared with other plastic foams, it is also non-toxic and odorless, has uniform bubbles, temperature resistance and other characteristics; .; printed products with added flame retardants are self-extinguishing when removed from the fire during use; Using rapid-mix foaming technology, it can be poured into prefabricated panels or components. It can also be foamed and molded on site, and the processing equipment is simple. The construction efficiency is high and the environmental pollution is low.
The softse of rigid polyurethane is widely used in construction, petroleum, chemical industry, light industry, transportation, district heating, refrigeration and refrigeration and food processing: refrigerators, freezers, aircraft fuselages, hulls of ships, the best thermal insulation. material for passenger cars, prefabricated houses, etc. ; it is also often used as filler for boats, pontoons, outboards, salvage equipment, and packaging materials for fragile products; open cell hard foam is a good sound absorption and soundproofing material.