Evaluation Electric water heater The energy efficiency grade has two performance indicators: hot water output rate and 24-hour inherent energy consumption coefficient.
Hot water output rate: the electric water heater is heated to the rated high temperature, and then the hot water inside is discharged. The volume of hot water discharged when the tank temperature is 20 degrees lower than the high rated temperature is the ratio of the rated volume of the water heater to the hot water output rate of the electric water heater. The higher the hot water yield is, the higher the efficiency of the electric water heater is, and the more energy-saving it is.
Since all electric water heaters with quick heating adopt vertical water tanks (i.e., placed vertically), they are absolutely superior to traditional electric water heaters with horizontal water tanks in terms of hot water output rate.
24 hour intrinsic energy consumption coefficient: refers to the ratio between the actual energy required to maintain the water temperature at the set temperature and the standard limited energy without using the water heater. The lower the ratio, the better the thermal insulation effect of the water heater. Generally ε express. Level 1 energy efficiency correspondence ε≤ 0.6, corresponding to level 2 energy efficiency ε≤ 0.7, Level 3 energy efficiency correspondence ε≤ 0.8, corresponding to level 4 energy efficiency ε≤ 0.9, corresponding to level 5 energy efficiency ε≤ 1.0。
This is often the reason why the energy efficiency level of the fast heating electric water heater is higher than that of the traditional electric water heater. It can be seen from the above analysis that the 24-hour inherent energy consumption coefficient is an indicator reflecting the thermal insulation effect of the water heater. The better the thermal insulation effect, the lower the energy efficiency level (Level 1 is good). The fast heating electric water heater is generally designed to be light and thin, so the insulation effect is certainly not comparable to the traditional water storage electric water heater.
Instant type Intelligent thermostatic water heater What consumers think of is how to save power with high power during use? The power of instant smart thermostatic water heaters we see on the market is generally about 3 to 8.5 kilowatts, so the power of instant smart thermostatic water heaters is relatively high. For some consumers who do not know instant smart thermostatic water heaters, will they think that the power of instant electric water heaters is high, so they consume more electricity? In fact, Such a perception is wrong. Power consumption is calculated by multiplying power by time.
In general, if you want to raise the temperature of 10 liters of water from 20 degrees to 50 degrees, the energy required is constant. Whether you use a water storage electric water heater, an instant intelligent thermostatic water heater, a gas water heater, or a solar water heater, you need a fixed energy to raise 10 liters of water from 20 degrees to 50 degrees.
If the instantaneous intelligent constant temperature water heater is used, it is to convert electric energy into heat energy. If the solar water heater is used, it is to convert solar energy into heat energy. Their power consumption depends not on the power of the water heater, but on the conversion rate and heat loss of the water heater. The energy required by water is fixed, so the time for high power to reach the required temperature is shorter, and the time for its heat loss is shorter, and the heat is less. Therefore, among these water heaters, the instantaneous intelligent thermostatic water heaters have higher power, but they do not consume electricity. They just need different time in the heating process.
