上世纪80年代，出现了玻璃纤维增强聚脂复合风管。玻璃纤维聚脂复合风管为有机材料，耐水气腐蚀不生锈，解决了镀锌铁皮复合风管易生锈，使用寿命不长的缺点，在纺织厂房广泛使用。
In the 1980s, glass fiber reinforced polyester composite air duct appeared. Glass fiber polyester composite air duct is made of organic material, which is resistant to water vapor corrosion and does not rust. It solves the shortcomings of easy rust and short service life of galvanized iron sheet composite air duct. It is widely used in textile plants.
耗能据测试，生产每m2(7.8kg)铁皮耗电20kWh。按制作每m2复合风管重量13.88kg钢材计算，每m2复合风管材料耗电42kWh。用镀锌铁皮制作复合风管更是耗能大户。
According to the energy consumption test, the power consumption per m2 (7.8kg) of iron sheet is 20kwh. According to the weight of 13.88kg steel per m2 of composite air duct, the power consumption of composite air duct material per m2 is 42kwh. Using galvanized iron sheet to make composite air duct is a big energy consumer.
由于聚脂复合风管是可燃材料，一旦由于电线短路起火或者意外火灾时，聚脂复合风管就会被点燃，很快会蔓延燃各个车间，引发火灾。这样，可燃的聚脂复合风管引起消防部门的重视。GB50045-1989《高层建筑防火设计规范》中规定：“通复合风管道要用不燃烧材制作”。从此，通复合风管道除强度要求外，增加了防火要求。
As the polyester composite air duct is a combustible material, in case of fire or accidental fire due to short circuit of wires, the polyester composite air duct will be ignited and will soon spread to all workshops and cause fire. In this way, the combustible polyester composite air duct has attracted the attention of the fire department. Gb50045-1989 code for fire protection design of high rise buildings stipulates that "the composite air duct shall be made of non combustible materials". Since then, in addition to the strength requirements, the fire protection requirements have been added to the composite air duct.
铁皮复合风管在风力作用下管壁振动，产生共鸣声，增加噪声。噪声也是能量损失。为了降低噪声，增设消声器，增加了复合风管的使用成本。
Under the action of wind, the pipe wall of iron sheet composite air duct vibrates, producing resonance sound and increasing noise. Noise is also a loss of energy. In order to reduce noise, a muffler is added to increase the use cost of composite air duct.
镀锌铁皮复合风管漏风量大，设计师一般按10%的漏风系数计算。而镀锌铁皮复合风管导热系数高，需要外保温，而外保温热桥(冷桥)的能量损失达到5%。这样，漏风量损失和热桥损失相加，铁皮复合风管能量损失达到15%。按20000m3/h风量，冷量300Kw，使用复合风管2000m2计算，每m2复合风管每h用电0.15kWh，24h用电3.6kWh,年用电1296kWh。按损失15%计算1296kWh×15%=194.4kWh。年用铁皮复合风管1亿m2，年损失电能194.4亿kWh。
The air leakage of galvanized iron sheet composite air duct is large, and the designer generally calculates the air leakage coefficient by 10%. The galvanized iron sheet composite air duct has high thermal conductivity and needs external insulation, while the energy loss of the external insulation hot bridge (cold bridge) reaches 5%. In this way, the energy loss of iron sheet composite air duct can reach 15% when the air leakage loss and heat bridge loss are added together. Based on 20000m3 / h air volume, 300kW cooling capacity and 2000m2 composite air duct, the power consumption per m2 composite air duct is 0.15kwh per hour, 3.6kwh per 24h and 1296kwh per year. 1296kwh based on 15% loss × 15%=194.4kWh。 The annual use of iron sheet composite air duct in China is 100 million m2, and the annual loss of electric energy is 19.44 billion kwh.
综合镀锌铁皮复合风管存在的问题可以看出，镀锌铁皮复合风管是钢材耗用大户、运行耗能大户、能耗损失大户。镀锌铁皮复合风管已属于技术落后产品、高能耗产品、低效益产品了。因此用非金属复合风管替代镀锌铁皮复合风管势在必行
Based on the existing problems of galvanized iron sheet composite air duct, it can be seen that galvanized iron sheet composite air duct is a large user of steel consumption, operation energy consumption and energy loss. Galvanized iron sheet composite air duct is a product with backward technology, high energy consumption and low benefit. Therefore, it is imperative to replace the galvanized iron sheet composite air duct with non-metallic composite air duct
随着时代的发展，必然有些新的产品将代替陈旧的产品。例如复合风管行业。玻镁复合风管必将代替金属复合风管。通复合风管道是建筑物的附属产品，很少有人去研究它。随着复合风管功能的增加，通复合风管道已经不仅仅有通风强度要求，而且还要具备防火、、、易清洗等功能。我国采用通复合风管道始于上世纪40年代。
With the development of the times, it is inevitable that some new products will replace old products. For example, composite duct industry. Glass magnesium composite air duct will replace metal composite air duct. Composite air duct is a subsidiary product of buildings, and few people study it. With the increase of the function of composite air duct, the ventilation of composite air duct not only has the requirements of ventilation intensity, but also has the functions of fire prevention, energy saving, environmental protection and easy cleaning. The adoption of composite air duct in China began in the 1940s.
在纺织行业里，为了提高纺纱织布的质量，要使车间保持设定的温度和湿度，输送特定温度和温度空气的管道当时称为复合风管。
In the textile industry, in order to improve the quality of spinning and weaving, the workshop should maintain the set temperature and humidity. The pipe conveying air at a specific temperature and temperature was called composite air duct at that time.
上一篇：排烟系统通风管道布局标准是什么？
下一篇：怎么减少通风管道的运行障碍？
