Guide: China's motor remanufacturing market has great potential. According to the data, China's motor holdings are about 1.7 billion kilowatts, and annual electricity consumption is about 3 trillion kilowatt hours. Motor power consumption accounts for 64% of China's electricity consumption and 75% of industrial electricity.
As a major motor producing country, remanufacturing is an important part of industrial strength, and energy saving and emission reduction of motor remanufacturing is of great significance. Experts have analyzed that the motor remanufacturing market in China has great potential and obvious energy saving effect, which will become an important area of remanufacturing in China.
Great market potential
China's motor remanufacturing market has great potential. According to the data, China's motor holdings are about 1.7 billion kilowatts, and annual electricity consumption is about 3 trillion kilowatt hours. Motor power consumption accounts for 64% of China's electricity consumption and 75% of industrial electricity.
From the point of view of the power consumption of the motor, the largest mechanical equipment used in China is the pump, compressor and fan. The motor consumption of these three types of equipment accounts for 74.2% of the total motor consumption.
From the number of motors in use, the largest mechanical equipment used in China is pumps, conveyors, fans, compressors and mixers, which account for 76.3% of the total number of motors used. Among them, the motors used in various types of pumps account for 50.2% of the total number of motors used.
The motor consumes a lot of power. According to statistics, in 2014, the total power consumption of China's motor system reached 355.56 billion kWh, accounting for 64% of the total electricity consumption of the society. Among them, the total electricity consumption of industrial system motors is 287.27 billion kWh, accounting for 71.9% of the total electricity consumption of industrial systems.
The motor system operates inefficiently. The operating efficiency of China's motor system is generally low and energy consumption is high, which is 20%~30% lower than the international advanced level. The efficiency of the unit itself is 3-5 percentage points lower than that of the developed countries.
Waste is serious. Many users in China consider and choose a large safety factor in the selection of equipment, generally taking 10% to 15% of the margin. Therefore, the phenomenon of “l(fā)arge horse-drawn car” is serious, and long-term low-load operation has caused great waste. The industry generally believes that inefficient motors have a 50% energy saving potential, and industrial energy conservation must start with improving the efficiency of the motor.
Motor remanufacturing benefits are highlighted
Motor remanufacturing can effectively improve efficiency. Compared with ordinary conventional motors, the remanufactured high-efficiency motor can improve the comprehensive technical performance and protection level, and its efficiency can be increased by 1-10% compared with similar products of Y and YKK series.
Frequency conversion motors are more efficient. The three-phase asynchronous motor operated by remanufactured variable frequency speed regulation has a power saving rate of more than 50%. If there is support from relevant government departments and related industries, there will be planned annual renovation of 5 million to 6 million kilowatts of inefficient wind turbines and pumps, with an average annual investment of 7 billion to 8 billion yuan, which can directly generate 5 billion to 6 billion yuan. Will account for 70% of the total investment.
Re-manufacturing compact, energy-efficient and environmentally friendly motors with improved efficiency. Re-manufacturing the efficiency of compact, energy-efficient and environmentally-friendly motors, the average efficiency is improved by about 5% compared with similar motors. According to the annual production of 2 million kilowatts of motor, the annual operation of 8,000 hours, the electricity cost is 1 yuan / kWh calculation, the use of remanufactured similar ordinary motors can save electricity costs of 170 million yuan per year.
The remanufactured variable-speed, environmentally-friendly and energy-saving motor has obvious power saving. A two-speed motor, the load is a fan, the motor power is 1000 kW at 6 poles, and the load power of the fan and the pump is inversely proportional to the cube of the speed, so when operating in the 8-pole state, the power is 420 kW. For example, one-third of the time is at a low speed, and the annual electricity saving is 139,000 kWh.
Remanufacturing low-voltage and high-power motors is quite popular. Taking a 450 kW and 4-pole motor as an example, the efficiency of a 6kV high-voltage motor is 94.0%, and the power is re-manufactured into a low-voltage high-power motor with an efficiency of about 96.3%. For long-term use, it is calculated by running 8000 hours a year. According to the electricity price of the industrial electricity price for one year, you can buy another motor of the same specification, and its marketing promotion is of great significance.
The remanufacturing of copper rotor motors is significant. The International Copper Association cooperates with Yunnan Copper Die Casting Technology Co., Ltd.. Since 2013, the most widely used and representative Y132-47.5kW motor type has been selected for old motors, keeping its stator subsystem unchanged. Next, redesigned the copper rotor.
The test results show that the energy efficiency level of the new motor after the replacement of the copper rotor has been improved from the original IE1 to IE3, and the two energy efficiency levels have been improved, so that the inefficient, non-energy-saving, nationally eliminated motors have become new requirements for national energy efficiency. High-efficiency energy-saving motor of Class 2 energy efficiency specified in GB18613-2012.
According to reports, the power saving rate of the modified Y132-47.5kW motor under actual working conditions is 7.02%. If the annual running time is 7,200 hours, the annual energy saving of each motor can be 3024kWh, saving about 2,500 yuan.
According to the statistics of national motor operation, taking 2010 as an example, if 50% of the motor in the country improves the efficiency of the motor by replacing the rotor, according to the average power saving of 4%, the country can save 53 billion kWh of electricity per year. At the same time, the cost of improving the energy efficiency level of the motor by replacing the rotor is much lower than the cost of a new motor, which not only achieves good economic benefits, but also achieves good social benefits.