My experience may not be able to help you, for your reference.
1. Cooling of solar water heaters is related to the following factors:
1. The amount of water in the water tank: the fuller the water, the slower the cooling; the less water, the faster the cooling.
2. Water temperature in the water tank: The higher the water temperature, the larger the cooling range; the lower the water temperature, the smaller the cooling range.
3. Cooling time: The amount of cooling is proportional to the cooling time.
4. Vacuum tube heat dissipation (i.e. vacuum degree, emission rate).
5. The thickness of the insulating layer of the water tank.
6. The structure of the water tank (the structural shape of the system and the distribution of water nozzles on the water tank, which are directly related to thea heat dissipation speed of water in water tank)
II, from the point of view of national standards. The following three conditions must be met at the same time:
1. The water tank is full
2. The water temperature is between 49 degrees and
3. Cooling time 8 hours
3. Experience, opinions, suggestions
1. According to the national standard testing experience, Huangming Solar's night cooling range. the water heater does not exceed 3 degrees (premise It fulfills the three conditions of “two” at the same time).
2. The structural shape, vacuum tube quality, insulation layer thickness and product quality of different manufacturers vary greatly, and there is no strong regularity. Even for the same product, if the same starting temperature, the same quantity of water and the same cooling time cannot be guaranteed, in theory, they are not comparable.
3. When consumers check the cooling rules on site, they cannot completely follow the national standards. At least the water temperature and duration are quite different. However, they must first make sure the water tank is full. and save the water tank at night. Once the internal temperature is reached, do not add any more cold water, so they can be compared.
4. Based on the above three points, it is recommended not to compare with other people's products, because it has no practical significance. You only use your own water heater's cooling data from last year to make a horizontal comparison with this year's cooling data. If you find that there is a big difference under the same conditions (full water, basically the same starting temperature, the same cooling time). , that proves thatthe heat dissipation of the vacuum tube (that is, the vacuum degree decreases, the emission rate increases, and the insulating effect of the water tank insulating layer is seriously attenuated.
Hello! Will make the house cooler, not hotter After installing solar panels on the roof, it blocks some of the sunlight from shining on the roof, just like a tree blocks the sun, and them. people feel cooler when standing under the tree so people on the ground should be a little cooler than when solar is not installed. Hope this helps. >