1. The solar water heater does not heat. There may be a problem with the vacuum tube, which is blocked by scale, which will also affect the heating effect.
2. On the other hand, it is also possible that the upper and lower water valves are not tight, which will also affect the heating effect. After all, sunlight absorbs heat. If the sunshine duration is short or there is something on the vacuum tube that blocks sunlight, this will also cause lack of heating.
3. Sometimes it's because the weather is bad and there's no sun. In this case, the water heater cannot start heating.
4. Another reason is that the water capacity of the water heater tank is relatively small, and the water inside is exhausted, but the water is not added in time. Without the base temperature of the water, it will naturally not heat up.
If solar energye does not heat up, we can solve it according to the reason. For example, it's raining, it's an objective factor. When the sun rises and the weather is clear, it's time to heat the house.
If a lot of dirt accumulates in the vacuum tube, it should be cleaned regularly to remove the dust inside, which will improve the heating effect.
Also note that if the upper and lower water valves are not closed tightly, you can tighten the upper and lower water valves. Additionally, if something is blocking the sun's rays, remove all shading obstacles so that the sun's rays can shine directly onto the heat collecting plate.
The water heater must be filled with water. If the weather is nice the next day, you can fill it with water the day before. After a sunny day, hot water can be used in the evening.
How does solar heat?
Diagramof the working principle of solar water heater 1. Cold water enters the solar water heater through the pipe and passes through the heat collector plate. , which can collect solar energy, convert solar energy into thermal energy, and then heat cold water. Since the density of cold water is higher than that of hot water, the hot water will automatically increase and then form circulating power. The water will gradually heat up on the heat collecting plate. After reaching a certain temperature, it can enter. the hot water tank. Those who need hot water will be able to get hot water at any time. Heating Figure 2. In fact, the principle of solar water heaters mainly includes the following two principles: (1) The principle of water circulation, that is, the water flows automatically. This is based on the fact that cold water is denser than hot water. Cold water flowsand the hot water rises, forming natural convection which gradually heats the water in the water tank until it reaches the set water temperature. When the intensity of the sun is not sufficient to meet circulation needs, a water pump can be added to the closed water circulation circuit to obtain forced circulation. (2) Collector heat absorption principle: There is a special coating on the collector surface of the solar water heater. This coating has a high absorption rate in the visible range of solar energy. After absorbing it in the form of heat, heat. the radiation from the collector will have the wavelength in the longwave range and the coating has low longwave emissivity, thus effectively retaining solar heat. This heat is then used to gradually heat the cold water into hot water. Solar collector tube Let's talk in detail about the c tubecollector on this collector. The collection tube is actually like an elongated hot water bottle liner. It is made of two glass tubes, one large and one small. The inner layer is covered with a spectrum-selective absorption coating, and straight air is drawn between the inner and outer tubes. It is that of the sun. The core of the energy water heater is used to absorb thermal energy as much as possible after solar radiation; because the vacuum glass tube is round, it has the characteristics of naturally following the broad source of the sun, coupled with the reflection principle of the reflector, the glass tube is surrounded by It receives all the light, has a collection effect longer heat and has higher water temperature It can work normally all year round, even in alpine areas.
Heating capacity of zero degree solar water heaters
Basically all kinds of energy on earth are solar energyire, like oil in ancient times, it is stored in form. energy through photosynthesis. It forms inside animals and plants, then is buried underground.
Solar energy in the narrow sense means that people obtain energy directly from the sun through scientific and technological means.
Solar heating is like basking in the sun in winter. This means finding materials with good thermal properties, directly absorbing solar heat, and obtaining hot water (solar water heater...) or electricity (that is to say too professional)... …) etc.
If you want a more professional answer, you can check it on Baidu Encyclopedia
The answer to the heating capacity of solar water heaters at zero degrees: after 5 hours sunshine In winter, the water temperature in the water tank can rise about 20 degrees, which means that the temperaturee in the water tank can reach around 50 degrees. 2. Generally, the water tank capacity is determined based on the number of people and the amount of hot water used. It can be calculated between 50 and 80 liters per person. If the water tank has a large capacity, there will be more vacuum tubes; if it has a small capacity, there will be fewer vacuum tubes. But there are also solar water heaters equipped with double-layer vacuum tubes, which have good heating effects in winter.