The solar water heater will not break down if it operates without water for a period of time.
Don't worry, it won't break, remember to avoid getting in the water when the sun is shining. Since the air drying in vacuum tubes can reach 240 degrees, water will cause the tubes to explode.
The key is timing of application of cold water. It is best to apply cold water in the morning when the sun is not yet out. Never go into cold water in the afternoon when the sun is strong.
Reason: There is no water in the heat insulation bucket, but there is water in the heat collecting glass tube. Under sunlight, the water temperature will be very high once cold water is added directly. "blow the tube" easily. Therefore, it is safest to add cold water when the water temperature in the collection tube is lowest.
TheSolar water heaters will not be damaged by the sun if there is no water.
At present, the heat collecting vacuum tubes of commercially available solar water heaters are generally made of extra hard high borosilicate 3.3 glass, and the heat absorbing film adopts a vacuum spray coating process. The insulated water tank consists of three parts: an inner tank, an insulating layer and an outer shell of the water tank. The shell is usually made of colored steel sheet, galvanized sheet or stainless steel sheet. The manufacturing process of the vacuum tube and the materials used in the insulated box shell are very special and have good solar energy absorption effect. Therefore, as long as it is a qualified product, it will generally not be damaged by the sun due to lack of water in the equipment.
Precautions for useion
1. Drain the water if you do not use it for a long time. Evacuated tube solar water heaters have high heat absorption efficiency. On sunny summer days, the water temperature in the water heater can reach boiling point in less than two days. If there is no water for a long time, the water tank will remain in a state of high temperature and pressure, which will promote the aging of the seal ring and accelerate the aging and shrinkage insulation material - polyurethane. Sometimes the exhaust does not flow properly. Too high pressure will cause the water tank to swell and scale, shortening its lifespan.
If the original tap water quality is poor, the water heater is stopped for a long time, and the water in the water tank is not drained, the Affected pipes connected to the water tank will rust easily. L'switch may not be closed tightly and the water tank may not be closed tightly. Therefore, when a family is away from home for a long time, they need to arrange for other people to frequently drain the water from the water heater or drain the water from the water heater before going out, or place a cover on the vacuum tube collector to block the sun then remove it after returning home.
2. Reasonably understand the timing of water supply. Although an unoccupied solar water heater will not be damaged by the sun, if water is added to a water heater exposed to the sun, the vacuum tube will still burst. Therefore, the timing of filling the solar water heater should be reasonable.
First of all, when the solar water heater is filled with water for the first time or the water tank has been empty for more than 15 minutes, be careful not to fill it with water. water duringthe day. The best time to get in the water is before sunrise in the morning or around 10 p.m. in the evening. Since the vacuum tube can reach 270 to 400 degrees Celsius without water, if cold water is suddenly added, the vacuum tube will burst due to the sudden drop in local temperature.
Second, do not be careless when filling the solar water heater when it is not empty. In summer, it is best not to fill the solar panel with water after 9 a.m. In winter, try not to replenish solar energy at night to avoid If the temperature is too low and freezes, solar energy will be damaged. Additionally, the amount of water should be determined based on weather conditions to ensure appropriate water temperature during bathing. If the weather is nice the next day, fill it with water; if it is cloudy or cloudy, fill it with half a tank of water; if it rains all day,keep the original amount of water without adding cold water.