Elevator energy-saving equipment suppliers remind you that elevator energy-saving refers to reducing the energy consumption of elevators during energy transmission, especially in standby mode, and improving elevator operating efficiency.
1. The most ideal weight balance
If the weight of the elevator car and counterweight is balanced when running up and down, the electric motor only needs to overcome the resistance of the sliding and rotating parts of the elevator. At this time, the elevator is most energy-efficient. But the load inside the elevator car is a variable. If the counterweight of the elevator can also change correspondingly with the load inside the car, this energy-saving method is the most ideal, but implementing this technology is very difficult.
2. Reduce standby energy consumption
Foreign research departments conducted energy consumption tests on 150000 elevators in operation. The report shows that the largest energy consumption in elevators is standby energy consumption, which accounts for about 58% of the total energy consumption of elevators. It can be seen that reducing standby energy consumption has a significant effect on improving elevator energy efficiency.
3. Optimize for reconfiguration
The average load rate of elevators is about 20% of the rated load, and the currently recognized elevator balance coefficient is 40% to 50%. After extensive testing and analysis, industry insiders suggest optimizing the balance coefficient to 0.35 for traction drive, 0.21 for energy regeneration devices, and 0.30 for hydraulic elevators, indicating that optimizing the counterweight configuration can also reduce the energy consumption of elevators during operation.
4. Energy feedback
In elevator energy feedback, energy recovery generally ranges from 20% to 50% depending on the type of elevator, frequency of use, and load capacity.
At present, the national energy consumption standards for elevators have not yet been introduced. Energy feedback energy-saving is achieved by installing an ERB device on the terminal of the original resistance braking unit of the elevator voltage inverter using PWM active inverter method, in order to achieve energy feedback. This method is suitable for elevators with heavy load and high frequency of use.
In addition, by replacing resistors for energy consumption, the ambient temperature in the machine room is reduced, and the operating temperature of the elevator control system is improved, extending the service life of the elevator. The machine room does not require the use of cooling equipment such as air conditioning, indirectly saving electricity.
5. Reasonably optimize the selection and management of elevators
Reasonable allocation of elevator types, quantities, operations, and stopping floors based on the nature of the building, service recipients, usage area, flow rate, and destination can achieve energy-saving effects and is also the most practical approach.
6. Develop new energy-saving technologies
The application of new technologies such as linear motors, torque inverters, and high-efficiency reducers in elevators can also save energy consumption.