GB/T 13466-92: General Rules for Economical Operation of AC Electrical Drive Fans (Pumps, Compressors)
1. General
This standard specifies general rules for the economical operation of AC electrical drive fans (pumps, compressors) in power systems. The purpose is to improve the energy efficiency of the fan (pump, compressor) operation, extend the service life and reduce maintenance frequency. This standard applies to AC electrical drive fans (pumps, compressors) with rated capacities of 50kW or above, especially to power plants, coal mines, chemical industry, textile industry and other energy-consuming industries.
2. Definitions
2.1 Air flow rate (q) refers to the air volume that the fan (pump, compressor) can deliver per unit time, in m 3 /s.
2.2 Pressure head (H) refers to the pressure difference between inlet and outlet of the fan (pump, compressor), in m of water column.
2.3 Air power (P) refers to the power required by the fan (pump, compressor) to overcome the pressure difference between inlet and outlet, in kW.
3. Design Requirements
3.1 The selection of the fan (pump, compressor) structure, type and size shall be designed to meet the reasonable requirements of the working conditions of the site, and the complete unit shall have the reasonable structure and reasonable matching.
3.2 The efficiency of the fan (pump, compressor) shall be qualified with reasonable accuracy.
3.3 For volatile or tight spaces, soundproof and vibration-proof measures shall be adopted.
4. Load Requirements
4.1 When the fan (pump, compressor) is running in large load, the efficiency of the fan (pump, compressor) shall be improved while maintaining the small load.
4.2 In general, the fan (pump, compressor) should operate at the minimum load and try to avoid overloading.
4.3 For the fan (pump, compressor) with large capacity, it is advisable to use smooth regulating control.
5. Service Maintenance Requirements
5.1 Appropriate maintenance methods shall be adopted for the fan (pump, compressor).
5.2 The filter device should be regularly cleaned to ensure that the air flow rate is sufficient.
5.3 The surface of the fan (pump, compressor) should be kept clean and free of dirt, dust and other non-organic matter.
5.4 Regularly check and adjust the belt drive device to keep it in good condition.
5.5 Regularly replace the lubricating oil in the bearing.
5.6 Check the condition of each electrical device and whether there is any abnormal phenomenon.
6. Operation Maintenance Requirements
6.1 When the fan (pump, compressor) is starting, the operation speed should be gradually increased to the rated speed, and the time is usually controlled within 1 minutes.
6.2 When the fan (pump, compressor) is in operation, it should run smoothly and not generate too much noise.
6.3 Monitor the motor temperature, pressure head and air flow rate during operation to ensure that the fan (pump, compressor) is running normally.
6.4 Adjust the fan (pump, compressor) system settings according to the environmental changes, and periodically check and adjust the system settings to ensure the efficient operation.
7. Shutdown Maintenance Requirements
7.1 Before shutting down, the motor should be slowed down to about 150 rpm and then stopped.
7.2 After shutdown, a certain amount of cooling time should be allowed after the motor temperature has returned to room temperature.
7.3 Regularly check and adjust the drive mechanism, bearings, etc., and check the condition of the contact points of the electrical components.
8. Test Requirements
8.1 After installation and prior to operation, the mechanical and electrical parameters of the fan (pump, compressor) should be tested to ensure the accuracy of the installation and the correctness of the system settings.
8.2 The measurements for two-terminal instruments should cover the following items: motor speed, voltage, current, power factor, pressure head, air flow rate and power used.
9. Disposal Requirements
9.1 Spare parts and wastes should be properly disposed of.
9.2 Parts containing hazardous substances, such as oil and lubricants, should be disposed of in accordance with relevant regulations.
