Answer: Using 1 kilowatt hour of electricity to pump water and then produce electricity will almost certainly be less than 1 kilowatt hour of electricity.
The work of the water pump converts electrical energy into mechanical energy (potential energy) of water. Power generation converts the mechanical energy of water into electrical energy.
According to the law of conservation of energy, during the operation of motors and generators, the mechanical efficiency is less than 1 and there are various energy losses. The final electrical energy obtained will be permanently reduced.
Since electrical energy cannot be stored, excess electrical energy will be wasted if not used. When electricity consumption is low, excess electricity is used for water storage by pumping, thereby improving the electricity utilization rate.
The construction of large-scale reservoirshelle for water and energy storage also requires significant investment, which is completely different from pumped hydroelectric energy storage.
Is the Fumin pumped storage plant a scam?
Water volume: V=150m×30m×20m=90000m3,
Water quality: m= ρV=1.0×103kg/m3×90000m3=9×107kg．
The work done by the pump: W=Gh=mgh=9×107kg×10N/kg×400m=3.6×1011J.
Pumping power: P=
| W |
| t |
| 3.6×1011J |
| 5×3600s |
Answer: The water pumping power is 20,000 kW.
The principle of a pumped storage power plant is that it does not consume electricityctricity
A pumped storage power plant uses electricity generated from a low peak electricity consumption to pump water to a high reservoir is a An energy-saving power plant that uses water from an elevated reservoir to drive hydroelectric generators to produce electricity during peak energy consumption. As we all know, electricity produced by hydroelectric plants is used as needed and cannot be stored. If electricity consumption is low, such as at night, and the factory machines are stopped to rest, the amount of electricity produced exceeds the quantity. request. Most TV channels are abandoned.
If a livestock power plant is built at this time, excess electricity can be pumped upstream using a powerful pump, replenish the water source, and then use it. the louser produce electricity during the peak period. This not only uses excess electrical energy but also increases the unit's electricity production during the peak period. It's a good way to kill two. two birds with one stone. Not only does it not consume much power, but it also saves energy.