The atmospheric pressure is 0.8 MPa, which is equivalent to a water depth of 80 meters. Generally, we can estimate that 6.5 cubic meters of water can generate one kilowatt hour of electricity, or 40 cubic meters of water. are exhausted, 6.15 kilowatt hours of electricity can be generated (take 6 kilowatt hours), that is, 2 kW can generate 3 kilowatt hours of electricity. The principle is that the atmospheric pressure remains constant. In fact, the electricity you use for pumping must be much higher than the electricity produced by the generator, can you believe it? .
A hydroelectric plant generates one kilowatt hour of electricity using a few tons of water
To produce electricity under a 30 meter high dam, one kilowatt hour of electricity requires 6.5 cubic meters of water. According to the relevant public information request: atmospheric pressure is 0.8 MPa, water height is 80 meters, 6.5 cu meterswater can generate one kilowatt hour of electricity. When 40 cubic meters of water are used, 6.15 kilowatt hours of electricity (take). 6 degrees), 2 kW can be generated for 3 hours, provided the air pressure is kept constant.
There is no definitive answer to your question. Some power plants can produce several kilowatt hours of electricity per ton of water, and some power plants require hundreds of tons of water to produce one kilowatt hour of electricity.
The energy production capacity of a ton of water in a hydroelectric plant is linked to the difference in height. When water reaches a low point from a high point, the potential energy of the water's position decreases with height. law of conservation of energy, the reduced potential energy becomes electrical energy. The quantity of electricity produced is directly proportional to the quwater resistance and height difference. Assuming that the height difference used by the hydroelectric plant is 100 meters, in theory, 3.67 tons of water can produce one kilowatt hour of electricity. energy losses (loss of water transport channels, conversion losses of generators and turbines). The loss is about 20%, so about 100 meters of height requires 4.6 tons of water to produce one kilowatt hour of electricity. Different heights can be calculated proportionally. Greater height will require less water.