Roughly speaking, it takes about 1 kilowatt hour of electricity to raise the temperature of a ton of water by 1 degree. Power consumption varies depending on the influencing conditions. For example, room temperature. When the temperature is below 10 degrees in winter, the machine consumes electricity to remove frost, but not in summer. Energy efficiency in summer is of course much better than in winter.
If the temperature of a ton of water increases moderately, then the best situation is:
First, 1 ton of water is equivalent to 1,000 kilograms. The specific heat of water is 4.1868 × 10 (3) J·kj-1·K-1 That is, to increase the temperature of a kilogram of water by 1 Kelvin (1 Kelvin = 1 degree Celsius), the heat required is 4,186.8 joules. Then, to raise the temperature of 1,000 kilograms of water by 10 degrees requires 4.1868×10(7) joules of heat.
Second, the energy of one kilowatt hour ofElectricity is 1 kilowatt hour, or 3599712 joules when converted to joules. It can be deduced that for the complete and lossless conversion of electrical energy into thermal energy, 11.63 kilowatt hours, or 11.63 degrees of electricity, are required.
It should be emphasized that not every water heater can convert energy without loss. If the conversion rate is 70%, it will require 16.6 kilowatt hours of electricity.