Once the water heater is frozen, it cannot be heated directly.
As ice is a solid, its thermal conductivity is lower than that of running water.
If electric heating is applied directly, this may cause overheating and overpressure near the electric heater, which may cause the surrounding ice to crack under the pressure.
This could cause the water heater barrel to burst or cause an overpressure explosion. The best thing to do is therefore to wait for the water heater to defrost naturally before heating it.
The observable phenomena and explanations are:
Phenomenon 1: The freezing time is longer. Conclusion: Water is a poor conductor;
Phenomenon 2: Ice forms more and more quickly. Explanation: As the temperature decreases more and more, the speed of ice formation will become faster and faster;
Phenomenon 3: The location of the ice formation is from the outside. Conclusion: The place where heat exchange occurs first is through the wall of the cup;
Phenomenon 4: The frosting progress is the same on the left and right, but the frosting progress is different at the top and the bottom (the bottom is easier to freeze than the top). Explanation: The lower the position in a certain space, the lower the temperature;
Phenomenon 5: The shape of the ice is basically the same as the shape of the container.
Detailed information:
In fact, the process of freezing water n It's not simple. When the temperature drops to 0°C, the water freezes and must contain small particles that serve as an attachment for the water molecules when they first freeze. The small particles in water are also called crystal nuclei.
TheWater molecules are often arranged so that the oxygen atoms face outward and the hydrogen atoms face inward. Oxygen atoms are slightly negatively charged, so they like a positively charged environment. If the environment is positively charged and the temperature is below 0°C, water will freeze easily, whether or not it contains crystal nuclei.
To start the freezing process at a higher temperature, the water molecules also need something else, like dust, soot or other impurities, so that the molecules of water can form a crystal lattice on them.