The water temperature of a solar water heater is not only related to the outside temperature, but also depends on the quality and performance of the collector tube, the lighting duration and the intensity of sunlight, tap water temperature and amount of water consumed. If you use and refill it every day, the water temperature will be low. If you don't use the water on the first day and refill it, under the same light, the water temperature on the second day will be fine. be higher than the first day, and so on. The water temperature will become higher. In summer, when the sunlight is strong, solar energy can generally reach more than 90 degrees.
The average duration of solar sunshine in winter is 7 hours/day. In this case, the daily temperature rise of a good solar water heater is usually around 30 degrees. It is recommendeddo not use solar water on the water heater. day of water supply, but to wait until the next day. Use it for two days. It will be easier to heat the next day and reach the temperature you need. Generally speaking, the water in the water tank can reach more than 70 degrees in two or three days.
Normal shower water temperature is above 45 degrees. If the temperature is high, mix it with cold water to avoid burns.
Generally, in summer, it is enough for the hot water temperature to reach 38 degrees, and it takes about 6 or 7 minutes for each degree of increase. In winter, that's enough. The hot water temperature reaches over 45 degrees, and it takes about 10 minutes for each degree increase.
The electrical heat per kilowatt hour is 860 K and the conversion rate is 92%. If 200 liters of water go from 20 degrees to 70 degrees and the tetemperature increases by 50 degrees, the required power consumption is 200. *50/(860*92%) = 12.6 degrees. Electricity, using a 1.5 kW electric heater requires time: 12.6/1.5 = 8.4 hours.
It takes an electric heating time of 2.5 kW: 12.6/2.5 = 5 hours. If 70 degree water is exposed indoors at 10 degrees, it will become cold in about 20 minutes if it is in a water tank. , the temperature of a good water tank will not drop more than 10 degrees 24 hours a day, and the best water tank will not drop more than 5 degrees.
Detailed information:
Notes:
1. In severe winter, if there is no water in the water tank, the water should not be filled immediately after air drying. Since the temperature inside the vacuum tube can reach around 2500°C when it air dries, the water in the tank. The reservoirr of water should be filled before sunrise or halfway. Do this after an hour to avoid pipe explosion.
2. If an auxiliary heat source is installed, the auxiliary heat source device and heat exchanger should be checked regularly to see if they are functioning properly. For auxiliary heat sources heated by electric heating pipes, you must ensure that the leakage protection device works reliably before use, otherwise it cannot be used. When using the electric auxiliary heater, special attention must be paid to filling the water. The volume of water in the water tank should not be less than 50% to avoid dry burning without water.
3. When taking a bath, pay particular attention to unplugging the power plug, and it is strictly prohibited to use it when it is sor voltage.
4. When installing heating tapes, be sure to choose products of acceptable quality to ensure normal use and reduce hidden dangers. When using the heating tape, be sure to turn it off promptly after defrosting, and try not to use it when the voltage is unstable.
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