Hot water tank with hot water tank is the most commonly used type in Vietnam, its structure is quite simple, it is a water tank and a burning rod embedded in the tank, in addition to a number of relays Thermostat helps the battery to automatically cut off power when the temperature is high enough.
Popular type of water heater in Vietnam
Normally, we will turn on the bottle for about 10 to 20 minutes and then turn it off to start bathing, which is the most common usage in Vietnam today. However, this usage has a little problem that each time you want to use it, it takes time to boil, short or long depending on the capacity of the container and the time of use.
The water heater, in addition to the on/off switch itself, is also equipped with a relay that automatically turns off when it is hot enough, so many people think that even turning on 24/24 will not consume more electricity than using it to turn it on. So how much does the electricity cost more specifically?
A smarthome user with Facebook is Le Xuan Quyen Posted my project on Group Vietnamese Smarthome. Accordingly, he proceeded to install an additional temperature probe completely immersed inside the tank and observe the response graph of hot water temperature for a long time to draw conclusions.
Specifically, when we turn on the bottle 24/24, in the state of stopping boiling, the water will lose about 1 degree Celsius every 43 minutes. And the water tank will lose total 32 degrees Celsius after 24 now not in use.
The boiling of water in the kettle also increases with the first function, which means that every time you turn on the power, you will consume exactly that amount of electricity, not affected by the short or long cooking time, more or less on and off.
Therefore, it can be calculated that every minute of heating the water temperature increases by 1.6 degrees Celsius. Therefore, to heat up the lost heat of 32 degrees Celsius, it will take us 20 minutes to cook every day if we do not turn off the main power of the house. heater.
And the electricity consumption will be 2500/3 (⅓ hour) = 833Wh = 0.83kWh (electricity) per day.
If we don’t turn off the water heater every day, we will waste nearly 1 amount of electricity. Try calculating for 30 consecutive days. 0.83 x 30 = 25 electricity numbers per month. The lowest electricity tariff for daily life is 1678 VND and the highest is 2461 VND. Therefore, we will lose from 41,950 VND to 61,525 VND per month.
Thus, the price you have to pay for the convenience of not having to wait for the water to boil before bathing is about 50,000 VND per month on average.
Not only the electricity bill, the continuous hot water in the tank is also the ideal condition for the electrochemical corrosion to progress faster, the tank will be scaled faster, requires more maintenance and the battery life is also shortened. follow.