Elevator energy feedback device is an advanced energy-saving technology that can significantly improve the energy utilization efficiency of elevator systems. The following provides a detailed analysis of the benefits of installing this device from multiple dimensions:
1、 Working principle and technical characteristics
The core principle of the elevator energy feedback device is to convert the mechanical energy (potential energy, kinetic energy) generated during elevator braking into electrical energy (regenerative energy) through power electronics technology, and return it to the AC power grid for use by other equipment. The specific work process includes:
Energy Conversion: When the elevator is fully loaded down or unloaded up, the device converts the electrical energy from the DC link of the frequency converter into an AC sine wave synchronized and in phase with the power grid
Intelligent regulation: using DSP intelligent control system to match the grid frequency in real time, with a conversion efficiency of over 95%
System integration: Deeply integrated with elevator frequency conversion system, replacing traditional heating elements such as braking resistors
Installing an elevator energy feedback device can bring a 25% -45% energy-saving rate, depending on the following factors:
Analysis of Influencing Factors and Reasons for Energy Saving Effect
The effect of floor height is more significant. High rise elevators brake more frequently and recover more energy
The frequency of use has a more significant effect, and frequent start stop generates more regenerative energy
Elevator speed effect is better. High speed elevators have greater braking energy
Elevators, both old and new, have better performance. Old equipment has greater mechanical friction losses
Actual cases show that in scenarios with high daily usage frequency, the comprehensive energy saving rate can reach 30% -42%. The energy-saving effect of some high-speed elevators can even reach 50%.
3、 Economic Benefit Analysis
From an economic perspective, installing energy feedback devices has the following advantages:
Direct energy-saving benefits: A single elevator can save up to 5000 kWh of electricity per year, which can save thousands of yuan in electricity bills calculated based on commercial electricity prices
Fast investment return: Equipment investment payback period only takes 1-2 years
Indirect cost savings:
Reduce energy consumption of air conditioning in the computer room (can lower the temperature of the computer room by 3-5 ℃)
Extend the service life of elevator equipment and reduce maintenance costs
Scale benefits: If this equipment is installed in all 10 million elevators nationwide, the annual electricity savings can reach 20 billion kilowatt hours
4、 Positive impact on elevator system
Equipment protection:
Eliminate the heat source of the braking resistor and reduce the damage of high temperature to the control system
Improve the working environment of the computer room and extend the lifespan of electrical components
Performance improvement:
Quickly eliminate pump voltage and improve braking performance
Improve the smoothness and comfort of elevator operation
Intelligent management:
Real time monitoring of elevator operation status to achieve preventive maintenance
Generate energy consumption data report and optimize elevator usage management
5、 Environmental benefits and social value
Carbon reduction: A single elevator reduces carbon dioxide emissions by approximately 1500kg per year
Grid optimization: Regenerated electricity can be fed back to the grid to alleviate local power supply pressure
Green buildings: helping the construction industry achieve carbon neutrality goals
Policy compliance: Responding to national energy conservation and emission reduction policies, enhancing the green image of property management
6、 Practical application cases
A certain office building project in Wuhan: After installing the energy recovery device of Tieneng Technology, the measured energy-saving rate reached 30% -42%
7、 Installation and maintenance advantages
Easy installation: Only 5 wires (3 Ethernet cables+2 inverter cables) need to be connected, with no phase sequence requirements
Ready to use: Once installed, it can be put into use without complex debugging
Easy maintenance: Compared to traditional braking systems, it reduces the need for replacing heating elements
In summary, installing energy feedback devices on property elevators can not only bring significant energy-saving and economic benefits, but also improve elevator system performance, extend equipment life, and have important environmental value. The investment return of this technology is particularly evident for elevators in high-rise buildings that are frequently used.