When installing solar power, the installation master inevitably has a saying: do not add water to the solar panel when it is hot, otherwise the pipe will explode. Read the instructions carefully and you may find similar instructions for use. heat at night It is best to provide solar hot water after watering and before 9 o'clock the next day. This must be done according to the instructions.
But sometimes at noon when the sun is shining, I find that only 20% of the water remains, or even less. If the water is not turned on, there may not be enough water for bathing at night. we are afraid of bursting the pipe. In this case, water can also be supplied;
After the solar water heater is installed and dried in the air without water supply, the temperature inside the vacuum tube exceeds 200° at such a high temperature. cold water enters, the vacuum tube suddenly experiences shrinkaget cold will of course burst the pipe. Therefore, to ensure that everything goes well, the advice given by the installation master and the instruction manual is to wait for the sun to set for an hour, or wait for the sun to rise before fill the water;
In fact, under normal use conditions, there is always a full water tube in the vacuum tube of the solar water heater, not to mention that under normal conditions normal In this case, at least 20% of the water is stored in the insulated water tank of the solar water heater. In this case, the water stored in the vacuum tube will circulate to dissipate heat, and the tube The highest temperature is about 100 degrees. .If you add water at this time, the cold water that has just risen will mix with the hot water in the water tank and then enter the vacuum tube. It will not cause violent changes of cold and heat in the vacuum tube. < /p>
Thus, for asolar water heater in normal use, as long as there is a small amount of water in the insulated water tank, you can safely fill it with solar water at noon. sunny day. For added safety, you can set the water filling at a low speed. After the hot water and cold water from the solar are completely mixed, you can open the water pipe.
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Watering is not allowed when the sun is strong at midday. Watering vegetables and trees is not allowed because the sun is so strong that after watering, the temperature will rise when exposed to the sun, causing the soil to burn. vegetables and root trees. In this season, watering should be done early in the morning or after sunset and the drop in surface temperature.
About science fiction:
There is no water on the sun. You can use an awning and put water on the awning, which is equivalent to watering the sun.
Choose the one that suits you.