Energy-saving Potential Large Motor System Usher In A Period Of Rapid Development

- Oct 13, 2018-

Driven by the national policy, the motor system has made great progress in the promotion of energy-saving products, research and development of energy-saving technologies, and implementation of energy-saving technological transformation projects. The motor system is an important industrial energy-consuming device, with an annual power consumption of 1.2 trillion. Kilowatt hours. At the seminar on energy-saving technologies for motor systems held recently, Li Aixian, vice president of China National Institute of Standardization, said that China's motor system consumes about 60% of China's total industrial power consumption, but the average motor efficiency is 3~5 lower than that of developed countries. The percentage of the overall operating efficiency of the motor drive system is 10-20% lower than that of the developed countries. The energy saving potential of the motor system is huge.

The comprehensive work plan for energy conservation and emission reduction in the 12th Five-Year Plan proposes that China will achieve the goal of saving 670 million tons of standard coal in the next five years. As a key project for energy conservation and emission reduction, the operating efficiency of the motor system should be increased by 2 to 3 percentage points. According to relevant sources, high-efficiency motor growth in the next five years is an inevitable event, with a conservative estimate of an average annual growth rate of over 70%.

Motor system has great potential for energy saving

As a power source for mechanical equipment, electric motors are widely used in various fields of national economic construction, and consume a lot of electricity. The data shows that the total installed capacity of electric motors in China has reached more than 400 million kilowatts, and the annual power consumption has reached 1.2 trillion kilowatt hours. Electricity consumption accounts for about 60% of China's total industrial power consumption, accounting for 50% of the country's total electricity consumption. However, compared with developed countries, China's motor system average efficiency is 3 to 5 percentage points lower, the motor drive system as a whole The operating efficiency is 10-20% lower. According to Zhang Xin, assistant to the president of the China National Institute of Standardization, 90% of China's current use of Y series motors, which were developed in the 1990s, have an average efficiency of only 87.3%. The average efficiency of high-efficiency motors in the United States is 90.3%. The efficiency of its latest series of motors is as high as 91.7%. It can be seen that the energy saving potential of China's motor system is huge. Zhang Xin said that China's compressors have a power saving potential of 10% to 50%, and the pump's power saving potential is 20% to 40%, while the fan system has the largest power saving potential, ranging from 20% to 60%. If all motor efficiency is increased by 5%, the annual saving of electricity will reach 76.5 billion kWh, which is close to the annual power generation of the Three Gorges. Although the energy saving potential of the motor system is huge, most users lack understanding of the economic benefits brought by the energy saving of the motor system, or the user realizes its great potential, but has no ability to carry out energy-saving renovation work. Secretary-General Zhao Ming said this.

The China Motor System Energy Conservation Challenge Project has established a nationwide energy-saving information platform for motor systems, which promotes communication and cooperation between motor system users, energy-saving service companies (ESCO), motor manufacturers and energy-saving management departments. In the three years since the implementation of the project, 1,700 units have participated in the project activities. The project successfully promoted the energy-saving transformation of 400 motor systems, saving more than 400,000 tons of standard coal per year for the country and reducing CO2 emissions by about 1 million tons per year. At the same time, the project fully utilized and played the role of the market-based mechanism of contract energy management, built bridges for energy-using units and energy-saving service companies, greatly reduced the capital and technical risks of energy-saving renovation of energy-using units, and fully mobilized energy-saving renovation of energy-using units. Enthusiasm.

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