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Fans are electric tigers and the main energy consuming equipment in national production. It is estimated that the electricity consumption of wind turbines accounts for 10% of the national electricity generation, so wind turbine energy conservation plays a crucial role in national economic production.

Against the backdrop of national energy conservation and emission reduction, improving the actual operating efficiency of wind turbines is crucial for enterprises to achieve their energy-saving and consumption reduction goals. Enterprises have a great demand for wind turbines to achieve energy-saving, so how can we improve the operating efficiency of wind turbines?

The design of fan parameters should be reasonable

From the previous analysis, it can be seen that excessive margin of the fan can lead to a decrease in the efficiency of the fan. Therefore, the reasonable design of fan parameters directly affects the actual operating efficiency of the fan, which is the fundamental factor in energy conservation and consumption reduction of the fan.

There is great development in fan technology nowadays, and the performance of fans is relatively accurate. When designing fan parameters, there is no need to leave too much margin, and the design of margin should comply with the principle of moderation.

In addition, there are selection and design standards for wind turbines in different industries in the country, which stipulate the margin of wind turbine parameters. These industry standards are generally formulated decades ago, when the technological development of wind turbines was relatively backward, so the margin of wind turbine parameters specified in the standards was relatively large. With the development of wind turbine technology, the update of standards was severely delayed, and was constrained by the margin of wind turbine parameters required by the standards, The design margin of the fan is too large, and the phenomenon of "big horses pulling small cars" is quite common. Therefore, the lag in standard updates seriously affects the energy-saving and consumption reduction work of the fan.

In addition, when designing and calculating the fan system, advanced CFD simulation technology can be used to simulate and calculate the resistance, air volume, and other parameters of the system. This calculation can obtain more accurate results, which are closer to the actual situation than traditional fan parameters calculated based on empirical coefficients.

For the modified fan, on-site testing of the system's resistance and flow rate can be conducted first, and then a new fan can be selected based on the actual situation. This way, the operating parameters of the new fan will be closer to the actual demand, resulting in higher efficiency of fan operation.

Select efficient and energy-saving equipment

There are many domestic wind turbine suppliers, and the vast majority of these suppliers are enterprises with outdated technology and low manufacturing level. The actual operating efficiency of the wind turbines supplied by these suppliers is relatively low. Taking mine fans as an example, mine ventilation fans represented by 2K56, 2K58, and 2K60 are relatively backward in technology and have low efficiency compared to the advanced ternary flow design of high-efficiency fans. However, they still exist in the market and need to be phased out more quickly.

Of course, efficient and energy-saving fan products are more expensive than technologically backward products. When purchasing equipment, enterprises should not only consider the initial investment of the equipment, but also consider the initial investment, operating costs, and maintenance and repair costs comprehensively. Only in this way can we truly implement the application of technologically advanced equipment on site and achieve the goal of energy conservation and consumption reduction.

Choose an appropriate fan adjustment method

The fan works in the system, and the actual system resistance inevitably deviates from the theoretical system resistance. Therefore, in actual operation, it is necessary to adjust the working point of the fan to meet the actual resistance requirements of the system.

There are generally several ways to adjust a fan, including inlet baffle adjustment, inlet guide vane adjustment, moving vane adjustment, and variable speed adjustment. The resistance loss caused by inlet baffle adjustment and inlet guide vane adjustment is relatively large, so the efficiency of the fan will be reduced. However, moving vane adjustment and variable speed adjustment change the performance of the fan by adjusting the angle and speed of the blades, without adding additional resistance loss, so the fan efficiency is higher, It is an efficient and energy-saving regulation method and should be prioritized.

Optimize the design of the ventilation system

Fans work in the system, and apart from the system, it is meaningless to talk about fans. The efficiency of a fan is closely related to the system, which has been analyzed earlier. In order to improve the actual operating efficiency of a fan, it is necessary to optimize the system design during the design phase, focusing on the following points:

The pipeline system design should be reasonable to avoid sharp turns or sharp changes in flow area. Install guide vanes at the pipeline elbow according to the situation to reduce airflow loss.

The margin of fan parameters should be moderate, and as analyzed earlier, do not leave too much margin to avoid the phenomenon of "big horses pulling small cars". The closer the actual working point of the fan is to the design point, the closer the actual operating efficiency of the fan will be to the design efficiency.

The ducts at the inlet and outlet of the fan should be designed with straight sections that are long enough, or rectifier grilles should be used in the ducts to reduce turbulence in the airflow and improve the efficiency of the fan.

Carry out energy-saving transformation of fans

For fans that have already been put into operation, the efficiency of the fan can be actually tested. For fans with lower efficiency, the following methods can be considered for modification to achieve energy conservation.

For fans whose actual operating point deviates significantly from the design point, a more effective energy-saving transformation method is to add variable frequency drive. The transformation is relatively simple, and the energy-saving effect is very obvious. However, attention should be paid to the issues mentioned above during variable frequency transformation.

For technologically outdated fan equipment, it is possible to consider replacing the entire machine with an efficient one. During the renovation, the inlet and outlet air ducts of the fan can be basically reused, and the foundation can be slightly modified to be suitable for new equipment. Based on experience, efficient and energy-saving products eliminate technologically outdated products, and the investment payback period is generally around three years.

For fans with actual operating points that do not deviate significantly from the design point, the rotor or blades can be replaced to improve the efficiency of the fan.

For situations with high losses in the fan system, it can be considered to add guide vanes in the air ducts and elbows to reduce airflow loss, thus achieving the goal of energy conservation.

Improve the management level of equipment operation

Good equipment requires good management, and improving the management level of equipment operation is also crucial for leveraging the advantages of equipment and improving the efficiency of equipment operation. It is recommended that enterprises start from the following aspects to strive for precise planning, on-demand ventilation, and avoid unnecessary energy waste.

Carefully arrange production, operate fans reasonably, and strive to achieve on-demand ventilation.

Improve the business level of equipment management personnel.

Optimize the system to avoid unnecessary increase in system resistance.

Equipment maintenance and upkeep should be in place, avoiding management concepts such as' just make do '.