Steps:
1. Paint the can or bottle black to better absorb heat.
2. Dig a hole in the foam and insert part of the bottle or can into the foam. The goal is to retain heat. The other part is exposed to the outside to receive heat.
3. Create a support frame behind the box or bottle so that the box can be tilted toward the sun.
4. Install reflectors around the box or bottle (top, bottom, left and right) so that it can fully receive the heat.
5. Once production is complete, simply place it in a sunny location.
Preparation of materials:
Cardboard, plastic foam or cotton, plastic bag or drink bottle that can hold water, glass or plastic film, box lid, black paper , mirror or aluminum foil etc.
Principle:
Solar water heaters mainly provident heating by absorbing heat from the sun, and at the same time ensure the function of heat preservation through the insulation of the inner tank and vacuum tubes. Only these two points can be resolved. Common homemade solar water heaters use black plastic drums, iron drums, or paint the outside of the drum with black paint to achieve rapid heat absorption.
Does it matter if solar power doesn't draw water for a month in summer?
It can keep warm. It's just that the insulation effect can get worse.
A layer of polystyrene or polyurethane foam is used for thermal insulation between the metal plate of the solar water heater water tank shell and the inner tank of the water tank. This foam layer has a porous and loose structure. the outer wall of the water tank is seriously deformed. When the local density of the neckInsulating polystyrene or polyurethane sheet increases, the original porous structure is destroyed and its insulating effect will be reduced.
Recommendations:
1. Check whether there are other abnormalities in the water heater tank in addition to shell deformation. If there are other anomalies, they must be eliminated; p> 2. In the water heater If the water tank is severely deformed, use appropriate tools to restore the deformed part
3. Stick PE heat insulator on the outer surface of the deformed part and aluminum foil; on the outer surface of the PE thermal insulation to strengthen local insulation.
Which is better, aluminum foil or asphalt fabric wrapped around solar energy?
There is no harm in Solar energy cannot draw water for a month in summer. Because there is a lot of solar radiation in summer. If water is not supplied for aFor a long period of time, the internal temperature of the solar water heater will remain high. If the vacuum tube is air-dried, the temperature inside the vacuum tube will reach several hundred degrees. The disadvantages are as follows
1. Long-term air drying will cause the insulation performance of the vacuum tube to decline. This results in a reduction in vacuum tube performance.
2. The water storage tank will age a little faster than when used. As a result, the thermal insulation effect will be reduced.
3. Some small accessories on the water heater, like silicone rings. In a long-term high temperature environment of hundreds of millions of people, aging is accelerated and lifespan is shortened. This will increase the risk of water leaking from the water tank vacuum tube.
To summarize the above reasons, if solar energy is not used for a long time, eit will be exposed to the sun. It's better to take shelter and block the sun. For example, colored plastic paper covers the vacuum tube part. Leave to dry for a long time.
Aluminum foil.
It is best to use aluminum foil tape for solar water heater pipe sleeves, air conditioner outdoor unit insulation pipes, etc. Aluminum foil refers to the paper composed of aluminum foil covering paper and aluminum foil paste. It is soft and easy to deform, like paper, and does not rebound after deformation. It can be qualitative, guaranteed shaded, will not fall, is opaque, non-polluting and inexpensive. It is used for moisture-proof and decorative packaging of cigarettes, candies and other high-end foods.
Aluminum foil is mainly used for the protection of packaging and is a very common industrial material in theeveryday life. Aluminum foil is widely used, such as cigarette wrappers and food packaging. According to different characteristics, aluminum foil is divided into more than 20 varieties.