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Provider of efficient ventilation solutions
Key to saving energy and developing high-efficiency products is the fan
Time:
2025-02-06
Relevant statistics show that the electricity consumption of wind turbines in use nationwide accounts for about 10% of the country's total power generation. Among them, the electricity consumption of wind turbines used in metal mines accounts for 30% of the total electricity consumption in the national mining industry; the electricity consumption of wind turbines used in the steel industry accounts for 20% of its total production electricity consumption; and the electricity consumption of wind turbines used in the coal industry accounts for 17% of the total electricity consumption in the national coal industry. Therefore, for the wind turbine industry, how to produce more energy-efficient and environmentally friendly wind turbine products is an issue that needs to be given high priority. Industry insiders believe that energy saving and environmental protection are eternal themes in the development of the wind turbine industry. So, where should wind turbine manufacturers start?
Relevant experts believe that the research and development of energy-saving wind turbine products must start from product design and wind turbine operation.
First, in terms of design, by applying the research results of impellers, volutes, and other components, and further improving manufacturing precision, we strive to increase the efficiency of various wind turbines by an average of 5% to 10%. Currently, advanced centrifugal fans use three-dimensional flow impellers, and their high efficiency can reach more than 87%; higher-efficiency axial flow fans have achieved efficiencies as high as 92%.
For example, the 4-71 and 4-74 three-dimensional flow impeller centrifugal fans developed by Shenyang Blower Research Institute in 1992 are high-efficiency and energy-saving new products that replace low- and medium-pressure centrifugal fans. Their efficiency is 4% higher than that of similar older fans, and the average annual electricity saving per fan is about 2000 kilowatt-hours. However, due to the complicated manufacturing process of the three-dimensional flow blades used in this fan, the manufacturing cost is higher than that of ordinary bladed fans. In addition, the high cost of technology transfer for the product increases the overall manufacturing cost of the fan, which is difficult for users to bear, resulting in limited promotion throughout the industry.
Secondly, utilize imported technology to develop high-efficiency and energy-saving wind turbines. For example, Shanghai Blower Factory Co., Ltd. and Shenyang Blower (Group) Co., Ltd. have introduced adjustable blade axial flow fan technology from Germany's TLT and Denmark's Novenco, respectively; Chengdu Motor Factory and Shenyang Blower (Group) Co., Ltd. have introduced static blade adjustable axial flow fan technology from Germany's KKK; Wuhan Blower Co., Ltd. has introduced moving blade adjustable axial flow fan technology from Japan's Mitsubishi Heavy Industries; Guangzhou Fan Factory has introduced axial flow and centrifugal fan technology; Chongqing General (Group) Co., Ltd. and Siping Jinfeng Co., Ltd. have introduced high-temperature fan technology from the UK's Howden; and Shijiazhuang Fan Factory Co., Ltd. has introduced centrifugal fan manufacturing technology from Japan's Ebara. Through technology introduction, the development of energy-saving ventilation fan products has been effectively promoted. During the "Eleventh Five-Year Plan" period, appropriate introduction of fan technology and special-purpose fans should be carried out according to market demand to fill the domestic gap.
In addition, adjusting the speed control mechanism and changing the operating conditions of wind turbine products are also very important. Currently, the speed control mechanisms of most wind turbines are relatively backward. Some products use traditional V-belts and worm gears as speed regulators, and most use throttle adjustment. Due to the above reasons, although the internal efficiency of some wind turbines is high (over 86%), their equipment efficiency is not high, and some are even as low as 30%. With the application of fluid couplings and frequency converters in wind turbines, the operating efficiency of wind turbines has been greatly improved, but the number of applications is extremely limited.
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