According to Article 17 of the "Energy Conservation Law of the People's Republic of China", the production, import and sale of motors (Y, Y2 series) with the original standard energy efficiency level 3 will be prohibited. Y series motors have been included in the mandatory elimination catalog of electromechanical products by the Ministry of Information Technology. In order to implement the "Motor Energy Efficiency Improvement Plan (2013-2015)" of the Ministry of Industry and Information Technology and the General Administration of Quality Supervision, Inspection and Quarantine, accelerate industrial energy conservation and consumption reduction, promote industrial transformation and upgrading and green development, and comprehensively improve the performance of Inner Mongolia Lantai Industrial Co., Ltd. (hereinafter referred to as the "Company") ") Motor energy efficiency level, accelerate the elimination of inefficient motors, save energy and reduce consumption, implement energy-saving technical transformation of motor systems, replace inefficient motors with high-efficiency motors, and use advanced technology to match motors and drag equipment.
1 Concept of high-efficiency and energy-saving motors
It mainly includes updating and eliminating low-efficiency motors and high-power-consuming equipment, rationally matching motor systems, improving motor efficiency, transforming traditional mechanical methods with advanced power electronic technology transmission methods, and realizing driven device control and equipment manufacturing.
2 Selection of high-efficiency and energy-saving motors
(1) When a new motor is needed in a new project, it needs to be selected;
(2) When the old motor is damaged or the motor needs to be re-winded, it needs to be selected;
(3) It needs to be selected when the motor needs to be updated when the motor has been running under low load or overload status for a long time.
3. High-efficiency and energy-saving motor effect
Compared with ordinary motors, the high-efficiency and energy-saving motor optimizes the overall design and uses high-quality copper windings and silicon steel sheets to reduce various losses such as winding loss, iron core loss, wind friction loss and load stray loss, and the loss is reduced by 20 %~30%, the efficiency increases by 2%~8%; the investment payback period is generally 1a~2a.
4 Relevant policy documents on improving motor energy efficiency
(1) "The Organization and Implementation of the Motor Energy Efficiency Improvement Plan issued by the National Bureau of Quality Supervision, Inspection and Quarantine of the Ministry of Industry and Information Technology (2013-
Notice of 2015);
(2) "GB18613-2006 Energy efficiency limit values and energy efficiency grades of small and medium-sized three-phase asynchronous motors";
(3) "GB18613-2012 Energy efficiency limit values and energy efficiency grades of small and medium-sized three-phase asynchronous motors";
(4) Other relevant national and industry-related technical standards and specifications.
5 Description of high-efficiency and energy-saving motors
The efficiency of high-efficiency energy-saving motors must fully meet the energy efficiency requirements of level 2 and above in GB18613-2012 "Energy Efficiency Limits and Energy Efficiency Levels of Small and Medium-sized Three-Phase Asynchronous Motors", and must pass the energy-saving product certification of the China Quality Certification Center and obtain the China Energy-Saving Product Certification Certificate . High-efficiency and energy-saving motors are mainly improved in the following aspects during the manufacturing process:
(1) Electromagnetic optimization design, comprehensive optimization of the system, air gap, slot fit and slot shape, repeated verification through a large number of prototype tests, ensuring the best performance of the motor in terms of electromagnetic design;
(2) The iron core is made of high-quality silicon steel sheets with low iron loss and high magnetic permeability, and the electromagnetic wire is made of H-class polyesterimide enameled round copper wire QZY-2/180 with a temperature resistance of 180°C, which greatly improves the performance of the motor. , reduce operating temperature rise and loss, thereby achieving the purpose of improving motor efficiency;
(3) Improve the bearing system of the motor, optimize the shape and design of the fan and wind shield, thereby reducing the mechanical loss of the motor;
(4) The new VPI vacuum impregnation process is used to enhance the voltage impulse resistance of the entire coil, reduce the inter-turn and inter-phase insulation accident rate, and the protection level and insulation level are at least one level higher than that of the old motor.
6 Implementation plan
(1) Principles for eliminating motor identification:
① Motors that are explicitly eliminated in the first, second, and third batches of high-energy-consuming electromechanical equipment catalogs issued by the Ministry of Industry and Information Technology;
② Motors with large room for improvement in efficiency must work continuously for ≥8000 hours throughout the year, with a load rate of 60% or more for motors below 55kW, and a load rate of 90% or above for motors 55kW and above;
③ Meet the conditions for elimination and transformation in 2015;
④ High-energy-consuming motors with poor operating conditions, high maintenance costs, and lack of spare parts;
⑤ After elimination and transformation, motors that are of great help to the long-term operation of the device.
(2) Without changing the motor center height, frame length, number of stages, and power as much as possible, give priority to purchasing YE3 series ultra-efficient motors for replacement.
(3) The principle of motor replacement should not affect the long-term stable production of the device: that is, there is a spare motor that can be replaced after the equipment is shut down. If it cannot be replaced during the production process, it can be replaced during shutdown and maintenance.
(4) After the plan review is approved, the technical transformation work will be completed in the contract energy management model immediately.
(5) Motor implementation plan design. High-efficiency and energy-saving motors are suitable for electric drive systems with long running times and high load rates. The principle of high efficiency and energy saving is to reduce the loss generated inside the motor during the electromechanical conversion process when the motor is running, improve the operating efficiency, and significantly save electric energy. Technically, through scientific loss analysis, design technologies such as three-phase "sinusoidal" windings, coordination and slot dimensions, and high-efficiency fans are adopted. Comprehensive energy-saving technologies such as specialized technology and high-quality effective materials are used to reduce copper (aluminum) consumption, iron consumption, mechanical wind friction and stray losses in the motor, reducing the total loss of the motor (20% ~ 30%) and increasing efficiency by 2% ~ 8%.
7 Energy Saving Benefit Analysis
The energy saving of high-efficiency motors is due to the fact that this type of motor has higher efficiency, lower loss, and larger power saving space than ordinary motors. The calculation formula of its annual power saving △E relative to the latter is as follows:
Calculation formula for energy saving of high-efficiency motors
illustrate:
(1) The motor runs for 8000 hours per year, the load rate is 75%, and the electricity price is 0.419 yuan/kW·h;
(2) The current quotation is the price without special requirements. If there are special requirements, the price increase will be as follows: the price will be increased by 8%;
(3) According to the principle of identifying obsolete motors, identify obsolete low-voltage motors. The company's first sodium production plant has a total of 152 units, with a total replacement power of 2998.6kW; the company's second sodium production plant has a total of 155 units, with a total replacement power of 5208.6kW; the company's sodium chlorate plant has a total of 193 units, with a total replacement power of 4795.35kW; There are 147 units in the thermal power plant, with a total replacement power of 3526.74kW; a total of 162 units in the company's chlorinated isocyanuric acid plant, with a total replacement power of 3362.85kW; a total of 65 units in the company's CPE plant, with a total replacement power of 1379.1kW; the company's Lanfeng The company has a total of 12 units, with a total replacement power of 200kW.
8 Payback period
8.1 Adopt contract energy management model
Involving the list of replacement motors listed, the total number of replacement motors to be purchased is 886 units, the total power of the motors is 21471.24kW, the purchase amount of motor equipment is 4.1389 million yuan, the total annual power saving is 2358710.9kW·h, and the total annual electricity saving is 101.28 Ten thousand yuan.
8.2 The government promotes and subsidizes high-efficiency and energy-saving motor standards
High-efficiency and energy-saving motor standards
The phased-out motors involved in the project are within the range of 0.55kW ≤ rated power ≤ 22kW, and the motor power is 5785.24kW × 58 yuan/kW·h
=335,500 yuan; within the range of 22kW＜rated power≤315kW, the motor power is 15686kW×31 yuan/kW·h=486,300 yuan, and the total state subsidy fee is 821,800 yuan.
8.3 Project investment and energy saving benefits (Table 2)
Energy saving benefit distribution table
8.4 Energy-saving benefit distribution plan for energy-saving service companies and energy-consuming units
After the energy-saving benefit sharing period ends (see Table 3), the ownership of this batch of high-efficiency motors belongs to the energy-using unit, and the energy-saving benefits generated in the future will be obtained by the energy-using unit.
Project investment and energy saving benefits
9 Investment estimation
The total investment cost of the project totals 4.1389 million yuan. 886 low-voltage outdated motors have been identified. After deducting government subsidies and waste motor recycling costs, the estimated investment cost is 3.0671 million yuan.
10 Conclusion
(1) Economic benefits. The company's sodium production branch eliminated a total of 886 backward low-voltage motors with a total power of 21,471.24kW, involving the replacement of motors listed in the list. The total annual electricity cost savings is 1.0128 million yuan, the national subsidy fee is 821,800 yuan, and the disposal fee of used motors is 250,000 yuan. Yuan. After the implementation of this project, the one-time annual cost saving is 2.0846 million yuan.
(2) Social benefits. Eliminating outdated motors complies with national energy conservation and emission reduction requirements and has good energy saving effects. At the same time, it also improves the company's overall equipment level.