Durkee fabric air dispersion system discharge air through fabric permeation and calculated orifices to create tri-dimensional air even dispersion effect with even air and comfortable air distribution, precise and high efficiency air throw.
As one of fabric duct manufacturers, we can provide kinds of fabric air duct for sale, anything you need, please contact us.
With the in-depth study of the air supply principle of the fabric air duct system, the design method of the fabric air duct becomes maturer and maturer, including the study and calculation of the on-way resistance inside the fabric air duct.
There are also pressure losses due to the frictional resistance and local resistance along the length direction of the fabric air duct system. Because the pressure loss is proportional to the wind speed, when the wind speed along the length direction becomes smaller and smaller, the resistance loss also decreases continuously. At the same time, there are also local resistance losses at the standard parts of the air duct and at the air outlets.
The main part is the straight duct in the fabric air duct system, and there are a few tee-junctions, elbows, and reducings in the system. Generally, the on-way resistance loss is the main resistance loss form. The frictional on-way resistance of the airflow in the duct with the unchanged air cross-section shape is calculated as follows:
The frictional resistance coefficient; the average velocity of the air in the duct, m/s; the air density, kg/m3; the duct length, m; the diameter (inside diameter) of the round air duct, m. The frictional resistance coefficient is a variable value, which is related to the flow condition of air in the air duct and the roughness of the duct wall. The frictional resistance coefficient obtained is no more than 0.024 (about 0.019 for the iron air duct) according to the comprehensive study on the fiber material and the fabric air duct system. The average wind speed in the ac air duct is 1/2 of the speed at the inlet of the air duct because there are air supply holes in the extension direction of the fabric air duct. It can be seen that the on-way resistance loss of fiber air ducts is much smaller than that of traditional iron air ducts.
To reduce the local resistance loss of the fabric non metallic air duct system, we usually carry out certain optimization designs:
1. Multiple factors should be taken into consideration when choosing the duct diameter, and try to reduce the wind speed in the duct as much as possible.
2. Optimize the design of special-shaped parts to avoid too rapid a change of flow direction and too fast a change of section.
It can be seen that the on-way resistance loss of the fabric air duct system, especially the straight duct system, is very small and generally, it will not exceed the static pressure regain value, so the resistance loss can be basically ignored in rough calculation!
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(4) The influence on floor height
An insulation layer needs to be wrapped outside the galvanized iron duct on site, and the insulation layer often requires replacement when carrying out maintenance, so in addition to the height of the duct itself, a certain space for installation and maintenance should be reserved.
The fabric air duct itself has the thermal insulation effect, so it can be installed close to the roof without reserving the space for installation. The measured results show that the use of fabric air duct can save about 5 -10cm in height compared with the use of galvanized iron air duct.
(5) The service life of galvanized ductwork
It is easy for galvanized iron sheet to rust in a humid environment, and the glass fiber, another kind of insulation material commonly used in galvanized iron air duct, will become brittle after moisture absorption, therefore, the service life of galvanized iron duct is about 5 to 10 years. While the textile air duct has a service life of up to 20 years. From this point of view, the service life of fabric air duct is much longer than that of galvanized iron air duct.
(6) The noise elimination performance of galvanized iron duct
Galvanized iron air duct is a kind of rigid duct without noise elimination effect, and it will even send the noise produced by the equipment to the workplace, so other noise elimination accessories such as sound proof housings and hend mufflers are needed. In addition, when suddenly encountering cold or hot wind, the galvanized iron air duct will produce stress deformation due to thermal expansion and contraction, so as to bring the annoying croaking. On the contrary, the fabric air duct is soft in texture and has good noise elimination performance. It is a very good tubular muffler, so there is no need to conduct noise elimination treatment, which can reduce a lot of troubles.
(7) Hygiene and health of galvanized iron duct
Galvanized iron air duct is easy to rust and produce the cold bridge phenomenon, so the dew formation is prone to occur. Therefore, bacteria such as legionella are easy to breed in galvanized iron air duct, resulting in secondary pollution to the air supply. In addition, the glass fiber, an insulation material commonly used in galvanized iron air duct will do harm to human health to some extent. Instead, the fabric air duct is not easy to produce condensation water, which can avoid the generation and spread of bacteria. Therefore, from the perspective of hygiene and health, fabric air duct is far better than galvanized iron air duct.
As is analyzed above, in practical application conditions, the performance and use of fabric air duct are much better than those of galvanized iron air duct in all aspects. Therefore, the combination of fabric air ducts can break through the limitations and inconvenience of traditional air ducts in the application of central air-conditioning air duct, which is worth being applied and promoted in various industries and fields.
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The stadium was designated as the Asia Games’basketball competition stadium, the hardware and software facilities of the stadium run thorough transformation to comply with the high-grade requirements of stadium standard set by GAGOC. The designed HVAC ductwork system was traditional GI ducts, but the solution encountered some difficulties.
The stadium inner space is 22m and is an all-steel construction structure. If it used traditional air conditioning duct, hundreds of tons crossed metal duct not only affect overall aesthetics but also add load-carrying to the roof, and take the ball nozzle outlets into account, it will greatly increase the total construction cost. The project leader finally decided to select Durkduct® fabric duct to replace traditional GI ductwork.
Durkee® Technic Center referred to the actual situation and designed 3 main fabric air ducts (16m in length) which perpendicular to the ground and each main duct connects to 2 branch ducts(1067 mm in diameter), the 6 branch ducts form a closed-type hexagon. The Durkee® fabric ducts with multi-line leaser cutting orifices separately supply air to the spectator stand, media stand, and basketball court, the ducts covered a larger area with lower airflow velocity, no noise and even & comfortable airflow, also the aesthetic appearance of ducts is in harmony with the construction structure as well as save total construction cost (lightweight fabric duct will significantly decrease load-bearing to roof).
Meanwhile, the suspension system of Durkee® air dispersion system is a cable quick suspension system, it is convenience to installation as well as maintenance processes, and these are directly lower HVAC ductwork system cost. Besides, selected grey fabric ducts to well match the surrounding decoration and highlight the aesthetic factor of our fabric duct sox systems.
Durkee® fabric air dispersion system solution met all requirements of the stadium ventilation and the airflow effect is good, our system passes the acceptance once after installation.
If you want to know more types of high velocity ducting stadium systems, please visit our website.
Fabric Air Duct System for Wandashan Dairy
Durkee® is a multi-national high-tech enterprise with a focus on offering solutions of high quality elastomeric thermal insulation, customized fabric air ducting and A/C system integration in the HVAC/R industry over the past 25 years. As a global technical-based manufacturing and solution service-oriented organization, Durkee has established 3 professional core business divisions (Durkee®, DurkflexTM, and Durkhvac®) and 4 renowned brands (Durkduct®, DurkflexTM, DurkductTM, and Durkhvac® ) with 2 modern manufacturing centers (Wuhan, Guangzhou China), 3 sales and service centers (China, Asia, and America), 20 branch offices and hundreds of distributors around the world. Meanwhile, Durkee has formed its own advantages in HVAC duct socks manufacturing and fabric light duct system building and designing among all the dairy ventilation air duct manufacturers in China. So far, Durkee air duct manufacturer has served thousands of clients from different industries in more than 36 countries worldwide.
TPI, as the largest independent manufacturer of composite wind blades, is founded in 1968 and headquartered in Arizona, US. TPI has expanded its global footprint to Asia, Europe, South America and the Middle East to set most advanced plants and factories. Now, TPI have four factories that manufacture precision molding and assembly systems for wind blades in China.
In May 2019, TPl wind blade factory located in Yangzhou Economic Development Zone has been successfully accomplished and put into production. This factory covers an area of 65762.49㎡ and the main building height reaches 21.7m. The original HVAC air duct system of the factory is designed with traditional air duct and the total volume of air supply and air return is up to 1450000CMH.
Due to advantages of easy & fast installation, lighter weight and higher cost performance, InsuSox pre-insulated fabric duct system successfully provided the Owner with a more economical solution. Meanwhile, this project has become the landmark project with large-scale application of Insusox pre-insulated fabric air supply and return system in Durkee history.
In the workshop, a combined air-conditioning unit with dual fans and all air system is adopted. The A/C unit is placed on the roof of auxiliary rooms on both sides of the workshop, the conditioned air is supplied from the middle part and returned from lower part.
InsuSox pre-insulated air duct in ellipse shape serves as primary air transmission duct, then connects with InsuSox pre-insulated fabric vertical duct, finally shift to Durkee fabric duct as secondary air dispersion duct. For example, Ellipse InsuSox system with diameter of φ2676mm*762mm on both sides of the roadway at 16m connect with several round shape vertical ducts with a diameter of φ610mm, then shifting to Durkee fabric air duct for air dispersion.
The orifices of Durkduct fabric air duct are at 7:00, 8:00 and 8:45 o’clock direction, air velocity reaches 0.5m/s at 1.5m height above the ground. The realization of exclusive low space precision air supply to the working spot can fulfill the air supply requirement with a spacing of 40m (Axis W-N).
The return air duct is designed in the form of rectangular pre-insulated returnsox and double-layers air return louver, the air volume of each A/C is about 58000CMH and return air pressure is 500Pa. At the height of 15m, the main return air duct (3000mm×800mm) is connected with a vertical return air duct (1250mm*400mm) and then connected with the double-layers air return louver, presenting very safe and high efficient air performance.
The overall design of the air supply duct and air return duct guarantees the even and comfortable air supply in the spacing of Axis W-N and achieves high-efficiency air supply and satisfactory A/C performance. The quiet gray air duct is blending well with the roof color perfectly, the whole air system is simple and aesthetic. With the advantages of a lightweight, modular quick installation, green construction, and overall energy saving, InsuSox return air system won good appraise by the project owner.
If you want to know more types of industrial air blades, please visit our website.
Tobacco Warehouse Air Ventilation HVAC System
Durkee® is a multi-national high-tech enterprise with a focus on offering solutions of high quality elastomeric thermal insulation, customized fabric air ducting and A/C system integration in the HVAC/R industry over the past 25 years. As a global technical-based manufacturing and solution service-oriented organization, Durkee has established 3 professional core business divisions (Durkee®, DurkflexTM, and Durkhvac®) and 4 renowned brands (Durkee®, DurkflexTM, DurkductTM, and Durkhvac® ) with 2 modern manufacturing centers (Wuhan, Guangzhou China), 3 sales and service centers (China, Asia, and America), 20 branch offices and hundreds of distributors around the world. Meanwhile, Durkee has formed its own advantages in HVAC duct socks manufacturing and fabric duct system building and designing among all the ventilation air duct manufacturers in China. So far, Durkduct air duct manufacturer has served thousands of clients from different industries in more than 36 countries worldwide.
Now the price of warehouse hvac systems is reasonable. If you want to buy hvac warehouse system, please contact us.
Tobacco Factory Ventilation
Durkduct system has been successfully applied into package factory, finished product warehouse and high rack warehouse, etc. It has been widely recognized by many renowned brands such as Chongqing Cigarette factory and Wuhan Cigarette factory.
Advantages
Even and comfortable air dispersion, precise control of temperature and humidity, condensation free, light weight and quick installation, easy maintenance.
CASE SHOW
Tobacco Warehouse Air Ventilation HVAC System
As a global leading A/C Ducting integrated solution provider and reliable fabric air duct manufacturer, Durkee is a multi-national high-tech enterprise with a focus on providing customized fabric air duct and A/C ducting solution in HVAC/R industry. With a complete set of product series, Durkee offers the most optimum A/C ducting solutions to present the best user experience.
Insusox is a pre-insulated composite ductwork with perfect integration of special textile duct surfaces and high-performance thermal insulation utilizing exclusively patented composite technology. Serving as air transmission ducts, it connects Durkduct Flexible Air Ducting System or insulated fabric air diffusers to replace the traditional GI ducts, diffusers, dampers, and insulation materials.
Advantages of Pre-Insulated Flexible HVAC Ventilation Duct
Fire Safety
Fabricated with fire – retardant material, the fire safety is more reliable
Thermal Insulation Performance
The thermal insulation layer is made of high quality thermal pre insulated duct material, integrated composite with infinite moisture resistance factor presents resulting in lower heating conductivity coefficient. This thermal air duct insulation material offers superior thermal insulation properties for your air ducts.
Lighter self-weight
Around 0.8-1.4kg/ ㎡, less than 1/15 of traditional duct,one time lighter than other type of composite duct,dramatically reducing heavy load of the building plus quick installation.
Quick Installation
With the realization of integration and streamline production in the factory, finished product is delivered to site and quickly installed bycables. the installation time is 1 / 10 less than traditional air duct without any on – site material wastage.
Better Pressure Resistance Property
The pressure resistance reaches 3000Pa.
High Cost-efficiency
Compared with traditional air duct, the layout design of is simpler. Factory finished product is easy and quick for installation ,significantly cutting the overall cost.
Green
Zipper connection and special double-layer sealing technique contribute to lower air leakage with less energy consumption. By utilizing environmental – friendly material plus quick dismantle and easy storage, Insusox is a reusable product with low carbon property.
Visual Pleasing
Multiple colors are provided to blend well with any interior decoration. Individually – customized design and fabrication are available to offer flexible and considerate service
More Quite
Given the flexible material and low inner air velocity, does not generate or transmit any resonance. Meanwhile, the insulation layer absorbs machine noise providing more quiet environment.
Where to Use Pre-Insulated Air Duct
Industry Facility Application
Isuzu is a joint venture auto producer. To propose air supply solution for the assembly workshop, both Insusox pre insulated fabric ductwork and Durkee textile air ductwork are selected by the Owner after considering roof loading capacity and insufficient air volume. Insusox serves as air delivery duct installing at 8m in height, which connects with Durkee air dispersion duct at 3m via vertical duct. The pre insulated ducting system presents energy saving, great comforts, aesthetic effect and no extra burden to roof loading capacity.
Commercial Facility Application
Auchan group was founded in 1961 in the northern French city of Lille. It is the 2nd largest retail distribution in France.In the Aushan Nantong store, Durkee fabric duct is applied in the shopping area and Insusox duct is selected for spaces with grilled ceiling, which contributes to a premium air condition system with advantages of energy saving environment friendly, condensation free,great comforts and no temperature difference along the duct.
Public Facility Application
Weihai gym is a large-scale training center of badminton and table tennis. Considering hundreds of diffusers, uneven air dispersion nd too high air velocity of metal duct, the owner decided to utilize Insusox pre-insulated fabric duct and Durkee flexible duct. Insusox is used for main duct and Durkee serves as branch duct, so that the cooling air can be delivered for 80m without wide temperature difference. Both the cooling air and fresh air are dispersed evenly and comfortably via precisely calculated orifices.
Durkeesox（Wuhan）Air Dispersion System Co.,Ltd