Six New Technologies of Elevator Energy Saving and Its Application

In 2013, the country with more than 60 million elevators, energy-saving elevators only 1.92%. By 2015, if the elevator is still used in all non-energy-saving elevators, China's elevator will be more power consumption of about 80 billion kwh, equivalent to the Three Gorges power plant a year of electricity
China's rapid development of elevator industry, the rapid development of the elevator industry at the same time, high power consumption problems can not be ignored. According to incomplete statistics, in 2013, the country with more than 60 million elevators, energy-saving elevators only 1.92%. By 2015, if the elevator is still used in all non-energy-saving elevators, China's elevator will be more power consumption of about 80 billion kwh, equivalent to the Three Gorges power plant a year's electricity, figures show how important elevator energy saving. This issue will lift elevator energy saving six ways and six new energy-saving technologies introduced.

Energy feedback technology

Energy feedback technology can be car light in the light of the upstream or full load generated when the regeneration of renewable energy and motor braking the kinetic energy generated by multiple rectifier technology into electricity and fed back to the grid for the same LAN other electrical equipment used, so that either Reduce the energy consumption of equipment and meet the green environmental protection. In accordance with this principle, has developed an experimental "hybrid power elevator", the feedback power can be stored in a special "battery" for other electrical equipment within the power grid to use.

Variable Speed ​​Technology in Operation

The rated power of the elevator traction motor is designed according to the maximum power output of the traction motor at full or no load conditions. When the car, the weight of the same conditions, the traction motor in theory, only to overcome the static friction on the traction wheel, the output power does not reach full capacity and still margin.

Under the premise of the same motor power, when the car, the weight of the same conditions, according to changes in the number of passengers relative to improve the speed of the elevator. With the rated speed of the traditional elevator compared to the use of variable speed technology can be appropriately increased elevator speed (the original ladder speed about 1.6 times). This relatively reduces the passenger's waiting time and take the elevator time, but also to the contribution of energy conservation and environmental protection.

Double - cab Operation Technology in Single

In order to improve the high-rise building elevator lift efficiency and utilization of the shaft, in recent years, there has been a single hoist double car technology. According to car position and operating conditions can be divided into super-double conjoined car, adjustable double-car linkage and dual-car independent operation of three types.

Single-hoist dual-car technology works in the same hoistway, two independent car by the intelligent control system through the sensor to monitor the two car positions to prevent collisions, so that it can be independently safe operation and play Increase the carrying capacity to achieve energy-saving role.

Sunny-lift elevator manufacturers

Purpose selection layer intelligent technology

Through the intelligent dispatching mode of the destination layer, efficient operation scheduling can effectively improve the operating efficiency of the elevator and reduce the waiting time of ladder or passengers.

The purpose of this paper is to build intelligent intelligent control system based on expert system, fuzzy logic and neural network control technology. It consists of group control unit, destination layer selector and floor indicator. It has dynamic decentralization, peak self-identification, dynamic partitioning service, Configure the service layer, deployment strategy selection and timely forecasting and other functions.

Wireless power transmission and wireless signal transmission technology

Through the wireless power transmission and wireless signal transmission, the elevator car without accompanying cable, can save the cable, but also can improve the elevator in the operation of the load balance, signal interference, safety performance and a series of safety and energy saving issues.

The elevator cab is used to connect the cab and elevator control cabinet to transmit power and signals. The current frequency is increased by the interaction of the transformer wall at the top of each hoistway wall and the top of the car, resulting in a high frequency magnetic field in the core coil. When the car secondary coil close to the induced current, and then rectify the battery charging for the DC, as the elevator car and the door power supply.

The elevator car side switch signal is collected by the original signal acquisition device and then hardwired to the car-side wireless signal transmission device. The antenna transceiver sends the signal to the wireless signal transmission device on the floor door side, and transmits the signal by cable Connect to the monitoring center. The monitoring center down to the elevator car side switch signal line is the opposite. In this way, the elevator car without the accompanying cable to complete the work of wireless signal transmission, in order to achieve the safe and energy-saving elevator operation.

Linear lift

A linear motor can convert electrical energy directly into mechanical energy in a linear motion without any conversion means. 1990 in Tokyo, Japan put into use by the linear motor-driven linear elevator, load 600kg, speed 1.75 m / s, lifting height of 22.90 meters.

A new generation of linear motor drive, no traction rope elevator, no room, weight and traction rope, with a simple structure, easy maintenance, no noise, no pollution and save electricity 60% advantage.

Therefore, the linear motor-driven non-traction rope elevator elevator may become the future direction of the development of high-rise building in the elevator.

elevator manufacturers elevator manufacturers

Six ways of elevator energy saving

Elevator energy-saving means to reduce the consumption of the elevator in the process of energy transmission, especially in the standby state of energy consumption, and improve the efficiency of the elevator.

The weight balance is optimal

If the elevator car and the counterweight in the upper and lower weight balance, the motor only need to overcome the sliding and rotating parts of the elevator resistance, this time, the most energy-efficient elevator. But the elevator car load is a variable, such as the weight of the elevator can also vary with the car load changes accordingly, this energy-saving method is ideal, but the implementation of this technology is very difficult.

Reduce standby power consumption

Foreign research departments of the 15 million units in operation in the energy consumption of the elevator test. The report shows that in the elevator energy consumption, the maximum energy consumption is standby power consumption, standby power consumption accounts for about 58% of the total energy consumption of the elevator, showing that reducing standby energy consumption to improve the efficiency of the elevator has a significant role.

Optimization of the reconfiguration

The average load rate of the elevator is about 20% of the rated load, and the currently accepted balance coefficient of the elevator is 40% -50%. After a large number of tests and analysis, the industry suggested that the balance coefficient can be optimized for the traction drive to take 0.35, energy recovery device to take 0.21, hydraulic lift 0.30, indicating the optimization of the re-allocation can also reduce the energy consumption of the elevator in operation.

elevator manfacturers elevator manufacturers

Energy feedback

In the elevator energy feedback, the energy recovery due to ladder species, the use of different frequency and load, generally 20% -40%. At present, the national elevator energy consumption standards yet introduced. The energy feedback energy conservation uses the PWM active inversion way to install the ERB installment on the terminal in the elevator resistance frequency changer original resistance braking unit, thus achieves the energy feedback function, this kind of method is suitable for the load capacity, the use frequency high elevator .

Reasonable optimization of elevator selection and management

According to the nature of the building, the service object, the use of area, flow and destination, such as the rational allocation of elevator variety, quantity, operation and stop layer layout scheme can play the effect of energy saving, is the most pragmatic approach.

Development of new energy-saving technologies

Linear motor, moment Chen inverter, high-efficiency reducer and other new technologies in the elevator can also save the application of energy consumption of the elevator.

Elevator energy-saving long way to go

China promulgated a series of laws and regulations on the energy-saving aspects of elevators, such as the Ministry of Finance, the National Development and Reform Commission jointly formulated the "energy-saving products, the implementation of the views of government procurement"; "Energy Conservation Law" provides special energy-saving equipment should be implemented energy review And supervision; the State Council, "Regulations on the supervision of special equipment," the elevator has been designated as high-energy consumption of special equipment, is expected to be included in the government procurement energy-saving list; AQSIQ upcoming release of the elevator energy-saving assessment of the "energy efficiency evaluation of the elevator And detection method ". The emergence of these laws and regulations, fully embodies the energy-saving attaches great importance to the elevator.

At present, China has become the world to promote and use the most energy-saving elevator country. Relevant departments said that in a certain period of time, across the country, promote the popularization of energy-saving elevators. Survey shows that if the first government departments and government departments in the building and public buildings in the application of energy-saving elevators, the power of these elevators in the state of renewable energy to achieve renewable energy consumption in accordance with the average rate of 30% feedback, the annual savings of 9 billion Degree of electricity. Elevator energy-saving technology promotion task is arduous, but a bright future.