{"id":11402,"date":"2021-06-29T05:57:18","date_gmt":"2021-06-29T05:57:18","guid":{"rendered":"https:\/\/duct.harsle.com\/?p=11402"},"modified":"2024-03-04T08:30:16","modified_gmt":"2024-03-04T08:30:16","slug":"what-is-the-ventilation-duct","status":"publish","type":"post","link":"https:\/\/duct.harsle.com\/pt\/what-is-the-ventilation-duct\/","title":{"rendered":"O que \u00e9 o duto de ventila\u00e7\u00e3o"},"content":{"rendered":"

What Is The Ventilation Duct What is the common duto de ventila\u00e7\u00e3o<\/a> no sistema de ventila\u00e7\u00e3o e ar condicionado? Quais s\u00e3o seus recursos exclusivos? Sobre o problema do material de pipeline, este artigo vai entender em detalhes e, a seguir, contaremos aos clientes como escolher m\u00e1quinas de dutos de ar.<\/a><\/p>\n\n\n\n

O que \u00e9 o duto de ventila\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n
Vantagens do duto de ar em folha de ferro<\/strong><\/h5>\n\n\n\n

1. It has high strength and can withstand the wind pressure of 3000pa, which can meet the use of a high, medium, and low-pressure air system. What Is The Ventilation Duct<\/p>\n\n\n\n

2. It can be processed on-site, with low transportation cost and convenient adjustment, without affecting the construction period. What Is The Ventilation Duct<\/p>\n\n\n\n

\"Duto
<\/figcaption><\/figure>\n\n\n\n
Defeitos do duto de ar da folha de ferro<\/strong><\/h5>\n\n\n\n

1.\u00a0It is easy to rust and has a short service life, which is not conducive to improving the indoor air quality. In a humid environment, the service life is only 5-7 years, and after 4-5 years, the inside of the air duct is full of rust. What Is The Ventilation Duct<\/p>\n\n\n\n

2.\u00a0High air leakage rate and high energy consumption. The iron sheet air duct is connected by bite and flange, and its air leakage rate is about 10% (permitted by national standards). What Is The Ventilation Duct<\/p>\n\n\n\n

3.\u00a0The ventilation is noisy. The thin wall of the iron sheet duct will produce noise under the action of wind speed and pressure. What Is The Ventilation Duct<\/p>\n\n\n\n

4.\u00a0Large weight increases the load of the building. The weight of iron sheet air duct is more than 10kg per square meter. What Is The Ventilation Duct<\/p>\n\n\n\n

5.\u00a0High thermal conductivity. The iron sheet air duct adopts external insulation, which increases the project cost and affects the construction period. If the external insulation is not in place or damaged, it will produce a cold bridge. Condensate damage to the ceiling will damage the following objects. What Is The Ventilation Duct<\/p>\n\n\n\n

6. O ciclo de produ\u00e7\u00e3o e instala\u00e7\u00e3o \u00e9 longo. O duto de ar em folha de ferro deve ser constru\u00eddo por maquin\u00e1rio de grande escala, com rebaixo e flange, e a velocidade \u00e9 lenta.<\/p>\n\n\n\n

7.\u00a0High maintenance costs. The iron sheet air duct should be maintained and treated with rust prevention. What Is The Ventilation Duct<\/p>\n\n\n\n

8) It’s not beautiful. The iron sheet air duct is not smooth and beautiful after external insulation. What Is The Ventilation Duct<\/p>\n\n\n\n

9.\u00a0Occupy the ceiling space. The iron sheet air duct, together with the height of the flange and the thickness of the insulation material, occupies a large ceiling space (generally 40-60 mm). What Is The Ventilation Duct<\/p>\n\n\n\n

Duto de fibra de vidro composto de folha de alum\u00ednio<\/strong><\/h3>\n\n\n\n

Aluminum foil composite glass fiber duct is made directly from the heat preservation material of iron sheet air pipe – superfine glass wool. In 1992, super air duct (glass fiber duct) entered the domestic market. Although it has been operated for more than ten years, the market share is still quite small, even the share is shrinking. What Is The Ventilation Duct<\/p>\n\n\n\n

\"Duto
<\/figcaption><\/figure>\n\n\n\n
Vantagens do duto de fibra de vidro composto de folha de alum\u00ednio<\/strong><\/h5>\n\n\n\n
    \n
  1. Absor\u00e7\u00e3o de som. Por ser feito diretamente de l\u00e3 de vidro superfina, o material \u00e9 relativamente solto e tem um bom desempenho de absor\u00e7\u00e3o de som.<\/li>\n\n\n\n
  2. Lightweight. It weighs about 3 kg per square meter. What Is The Ventilation Duct<\/li>\n<\/ol>\n\n\n\n
    Defeitos do duto de fibra de vidro composto de folha de alum\u00ednio<\/strong><\/h5>\n\n\n\n

    1.\u00a0The strength is poor. Due to the direct use of ultra-fine glass wool production, poor pressure bearing capacity can only be used in low-pressure, small ducts. Finished product protection requirements are high, easy to be broken by the later hydropower and decoration projects. It can’t be cleaned. What Is The Ventilation Duct<\/p>\n\n\n\n

    2.\u00a0I’m afraid of dampness. Ultrafine glass wool has high water absorption. If the surface is not sealed properly, especially after slotting, it will absorb a lot of water and reduce the heat preservation performance and strength. What Is The Ventilation Duct<\/p>\n\n\n\n

    3.\u00a0The fiber is easy to disperse. If the surface of superfine glass wool is not sealed in place, especially after slotting, it will lead to fiber dispersion and affect human health. What Is The Ventilation Duct<\/p>\n\n\n\n

    4.\u00a0Large wind resistance. The absolute surface roughness is 0.9-1.1 mm. Generally, the unit power is required to be increased by 10% to increase energy consumption. What Is The Ventilation Duct<\/p>\n\n\n\n

    Duto de poliuretano de folha de alum\u00ednio<\/strong><\/h3>\n\n\n\n

    Aluminum foil polyurethane air duct is a kind of air duct made of polyurethane in the middle and composite aluminum foil on both sides. One of the main characteristics of aluminum foil polyurethane air duct is lightweight, but its biggest deficiency is that the fire performance can not meet the national requirements. The national “code for fire protection of high rise buildings” and “code for fire protection of civil buildings” both stipulate that the ventilation duct materials must be made of class non-combustible materials. Aluminum foil polyurethane air duct can only reach B 1 level at the highest, and its accessories and glue are organic materials, and can only reach B 1 level at the highest, which is not in line with national standards. The poor strength and pressure bearing capacity of the aluminum foil polyurethane air duct are also its major shortcomings. What Is The Ventilation Duct<\/p>\n\n\n\n

    \"Duto
    <\/figcaption><\/figure>\n\n\n\n

    Duto fen\u00f3lico composto de folha de alum\u00ednio<\/strong><\/h3>\n\n\n\n

    Phenolic duct is made of phenolic as thermal insulation material and composite aluminum foil on both sides. What Is The Ventilation Duct<\/p>\n\n\n\n

    The phenolic duct has the advantages of lightweight and obvious disadvantages, such as poor strength, easy pulverization, easy delamination of aluminum foil and phenolic, a large number of strong acids used in the foaming process, organic glue containing formaldehyde, which is not environmentally friendly. What Is The Ventilation Duct<\/p>\n\n\n\n

    \"Duto
    <\/figcaption><\/figure>\n\n\n\n

    Duto de ar em placa de a\u00e7o colorido<\/strong><\/h3>\n\n\n\n

    The color steel plate air duct is divided into single-sided color steel and double-sided color steel. The single-sided color steel is to move the original superfine glass wool from the outside to the inside, that is, a layer of color steel from the outside and a layer of superfine glass wool from the inside. The double-sided color steel is to make a layer of iron sheet protection outside the insulation cotton of the iron sheet air duct. There is no great innovation compared with the iron sheet air duct in technology, but it is actually the iron sheet air duct. The improvement point is that PVC insert is used to replace the bite and flange, and the thermal insulation cotton and color steel plate are formed at one time without secondary thermal insulation. What Is The Ventilation Duct<\/p>\n\n\n\n

    \"Duto
    <\/figcaption><\/figure>\n\n\n\n
    Vantagens do duto de ar de placa colorida de dupla face<\/strong><\/h5>\n\n\n\n

    1. A estanqueidade \u00e9 melhorada. Como as inser\u00e7\u00f5es de PVC s\u00e3o usadas para substituir a mordida e o flange, a taxa de vazamento de ar do duto de ar da folha de ferro \u00e9 reduzida.<\/p>\n\n\n\n

    2. There is no need for secondary insulation, which improves the construction efficiency. What Is The Ventilation Duct<\/p>\n\n\n\n

    3. The color steel plate air duct improves the service life. What Is The Ventilation Duct<\/p>\n\n\n\n

    Defeitos do duto de ar da placa colorida de dupla face<\/strong><\/h5>\n\n\n\n

    1. The use of PVC inserts instead of bite and flange makes the iron sheet air duct nondescript. It not only reduces the fire resistance and fire resistance of the air duct (PVC inserts can only reach B1 level) but also makes the advantages of good toughness of the iron sheet completely lost. In order to improve the tightness, it is more reasonable to think about the construction quality or plugging of the iron sheet air duct. What Is The Ventilation Duct<\/p>\n\n\n\n

    2. Glass wool is easy to disperse inside, which affects human health. Both single side and double side color steel plates need to be slotted to make an air duct. The sealing after slotting is a big problem, and it is difficult to seal in place. What Is The Ventilation Duct<\/p>\n\n\n\n

    3. The air duct is not easy to clean. The interior of one side is glass wool, which is not easy to clean. The interior of two sides is color steel plate. Under the action of cleaning brush, the paint layer will be damaged, which will affect the service life. What Is The Ventilation Duct<\/p>\n\n\n\n

    4. Compared with the iron sheet air duct, the strength is greatly reduced. The thickness of the color steel plate is only 0.3mm, which is 0.2mm less than the thinnest 0.5mm of the iron sheet air duct. The air duct needs to be reinforced, and the spacing between supports needs to be reduced, which increases the cost. What Is The Ventilation Duct<\/p>\n\n\n\n

    5. The finished air duct leaves the factory, which makes the iron sheet air duct easy to make and adjust on site. What Is The Ventilation Duct<\/p>\n\n\n\n

    6. PVC flange strength is not high, no metal bite and flange strength is high, is a weak point of strength. What Is The Ventilation Duct<\/p>\n\n\n\n

    Duto de vidro de magn\u00e9sio<\/strong><\/h3>\n\n\n\n
    \"Duto
    <\/figcaption><\/figure>\n\n\n\n
      \n
    • Glass magnesium air duct saves energy and reduces the operating cost of the system (energy saving air duct). The energy saving effect of glass magnesium air duct is quite obvious, which is more than 10% more than that of iron sheet air duct. For air duct, the main indexes to distinguish the performance of air duct are the resistance along the way, air leakage rate and insulation performance. The smaller the resistance, the lower the air leakage rate and the better the insulation performance, the better the performance of the air duct is. Glass magnesium air duct has excellent performance in these aspects: What Is The Ventilation Duct<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Bom desempenho de isolamento, reduz o consumo de energia de condu\u00e7\u00e3o de calor. Duto de ar de magn\u00e9sio de vidro materiais de isolamento diretamente compostos, n\u00e3o precisa de isolamento secund\u00e1rio, a condutividade t\u00e9rmica do duto de ar \u00e9 pequena, excelente desempenho de isolamento, reduz a perda de condu\u00e7\u00e3o de calor no processo de transmiss\u00e3o de ar quente e frio, de acordo com o \u201cc\u00f3digo nacional\u201d para projetos de conserva\u00e7\u00e3o de energia de edif\u00edcios p\u00fablicos \u201d. Ao mesmo tempo, o tubo de ar de vidro e magn\u00e9sio melhorou o isolamento externo do tubo de ar em folha de ferro e o mudou para isolamento interno, o que torna o material de isolamento protegido por uma camada inorg\u00e2nica e evita danos aos materiais de isolamento ou outros poluentes em a constru\u00e7\u00e3o de outros tipos de obras, de modo a tornar o efeito de isolamento est\u00e1vel e duradouro.<\/li>\n\n\n\n
      2. The air leakage rate is low, and the air delivery efficiency is improved. Glass magnesium air pipe is made of adhesive structure, without flange connection, which greatly improves the airtightness of air pipe. Compared with iron sheet air pipe, it reduces air leakage of bite and flange, reduces air leakage rate of the air pipe, and improves air transmission efficiency. The air leakage rate of the glass magnesium air pipe is only 1\/10 of the iron sheet air pipe. What Is The Ventilation Duct<\/li>\n\n\n\n
      3. The glass magnesium air duct plate is manufactured mechanically with a smooth and flat surface, small friction coefficient, and low wind resistance, and the absolute roughness of the air duct surface is less than 0.2 mm. What Is The Ventilation Duct<\/li>\n<\/ol>\n\n\n\n
          \n
        • Glass magnesium duct can bring clean air (environmental protection duct) and improve indoor quality (IAQ). Glass magnesium duct can improve indoor air quality without rust, mildew, dust, bacteria, and fungi, dust and fiber, odor, granular and gaseous pollutants, and biological aerogel. What Is The Ventilation Duct<\/li>\n\n\n\n
        • O duto de ar de vidro e magn\u00e9sio tem bom desempenho de isolamento ac\u00fastico, com isolamento ac\u00fastico m\u00e9dio de 21 db. Enquanto isso, o material de isolamento tem a fun\u00e7\u00e3o de redu\u00e7\u00e3o de vibra\u00e7\u00e3o e absor\u00e7\u00e3o de som, o que pode isolar e reduzir o ru\u00eddo gerado pela vibra\u00e7\u00e3o do ar e m\u00e1quinas, eliminar o ru\u00eddo causado pela contra\u00e7\u00e3o e expans\u00e3o do duto de ar da folha de ferro e manter o ambiente interno silencioso.<\/li>\n<\/ul>\n\n\n\n
          \"ducto
          <\/figcaption><\/figure>\n\n\n\n
            \n
          • Produtos de alta qualidade e alto desempenho de duto de vidro e magn\u00e9sio<\/li>\n<\/ul>\n\n\n\n
              \n
            1. Excelente desempenho ao fogo. O duto de vidro e magn\u00e9sio \u00e9 feito de materiais inorg\u00e2nicos n\u00e3o combust\u00edveis e materiais de isolamento t\u00e9rmico por processo de alta tecnologia. \u00c9 uma classe de material n\u00e3o combust\u00edvel testada pelo centro nacional de supervis\u00e3o e inspe\u00e7\u00e3o de qualidade de materiais de constru\u00e7\u00e3o de prote\u00e7\u00e3o contra inc\u00eandio (Composto geral de Grau A).<\/li>\n\n\n\n
            2. Desempenho de super alta resist\u00eancia. O duto de vidro de magn\u00e9sio tem alta resist\u00eancia, capacidade de carga superior a 1000 N, pode suportar a press\u00e3o do vento de 3000 pa, pode atender ao uso de um sistema de ar de alta, m\u00e9dia e baixa press\u00e3o. A alta resist\u00eancia tamb\u00e9m reduz os requisitos de prote\u00e7\u00e3o do produto acabado no processo de constru\u00e7\u00e3o, de forma que o produto n\u00e3o seja facilmente danificado.<\/li>\n\n\n\n
            3. Excellent moisture-proof and water-resistant performance. Glass magnesium duct is not afraid of water and does not rust and corrode in a humid environment. Even if immersed in water, it can still maintain high strength, with wet strength as high as 80%. What Is The Ventilation Duct<\/li>\n\n\n\n
            4. Pode efetivamente melhorar o espa\u00e7o l\u00edquido do teto. O duto de vidro de magn\u00e9sio adota o processo de conex\u00e3o sem flange, o que economiza a altura do flange e pode melhorar o espa\u00e7o interno l\u00edquido.<\/li>\n\n\n\n
            5. The weight of the glass magnesium duct is 7 kg per square meter, which is 30% lighter than that of the iron sheet duct. It can effectively reduce the building load. What Is The Ventilation Duct<\/li>\n\n\n\n
            6. Apar\u00eancia bonita. O duto de ar de vidro magn\u00e9sio \u00e9 conectado por flange, com fundo plano e bela apar\u00eancia. A parede externa pode ser pintada com qualquer tinta para facilitar a decora\u00e7\u00e3o secund\u00e1ria.<\/li>\n\n\n\n
            7. No cold bridge, more energy-saving. Glass magnesium duct adopts no cold bridge construction technology, there is no cold bridge node, more energy-saving. What Is The Ventilation Duct<\/li>\n\n\n\n
            8. Montagem e instala\u00e7\u00e3o no local, alta efici\u00eancia de constru\u00e7\u00e3o, economiza tempo. O duto de vidro de magn\u00e9sio adota tecnologia de montagem e instala\u00e7\u00e3o no local, n\u00e3o precisa de grandes m\u00e1quinas e equipamentos, o ajuste no local \u00e9 r\u00e1pido e de alta efici\u00eancia pode economizar tempo.<\/li>\n<\/ol>\n\n\n\n
                \n
              • O peso do duto de vidro e magn\u00e9sio \u00e9 menor do que o de outros dutos compostos.<\/li>\n<\/ul>\n\n\n\n
                \"duto
                <\/figcaption><\/figure>\n\n\n\n

                Al\u00e9m dos dutos de ventila\u00e7\u00e3o acima, os seguintes dutos de ventila\u00e7\u00e3o tamb\u00e9m s\u00e3o comumente usados em sistemas HVAC:<\/p>\n\n\n\n

                  \n
                • Materiais e tipos de tubos de ventila\u00e7\u00e3o usados na engenharia HVAC<\/li>\n<\/ul>\n\n\n\n
                    \n
                  1. Galvanized iron sheet air duct. This is a kind of ventilation pipe which is used earlier and still used at present. It is made of galvanized iron sheet and is suitable for gas transmission with small moisture content. However, due to its early appearance, there are many imperfections, such as ease to rust, poor anti-corrosion ability, lack of noise attenuation and heat preservation function, so it is necessary to set up an additional muffler and heat preservation protective layer, As a result, the production cycle is long, and the installation is inconvenient, there will still be large noise when using, and the service life is short. What Is The Ventilation Duct<\/li>\n\n\n\n
                  2. FRP air duct. Glass fiber reinforced plastic air duct is a kind of ventilation duct made of relatively new magnesium oxychloride material, which is strengthened by glass fiber cloth. It is made after hydration reaction and curing. This kind of pipe has the characteristics of fire resistance, corrosion resistance, high hardness but heavyweight, and also does not have the function of noise elimination and heat preservation. It needs to add a muffler and heat preservation protective layer to ensure the better operation of the HVAC system. Therefore, more time and energy are needed in the production and installation, and it is not easy to change and modify once the design is completed, It brings some trouble to the user process. What Is The Ventilation Duct<\/li>\n\n\n\n
                  3. Composite fiberglass duct. Composite fiberglass duct, also known as the new super duct, is a new type of ventilation duct with scientific and technological content with the continuous progress of science and technology in recent years. Centrifugal fiberglass board is used as the main material, and anti-moisture aluminum foil cloth is set outside the pipe, glass fiber cloth is used inside, and glue spraying is carried out. The composite fiberglass duct is light in the material, small in volume, easy to install, space-saving, easy to modify, fire-resistant and moisture resistant, and can eliminate noise, heat preservation, reduce air leakage, easy to use, long life, high cost performance, which has good application advantages in the current ventilation duct. What Is The Ventilation Duct<\/li>\n<\/ol>\n\n\n\n
                    \"rectangular
                    <\/figcaption><\/figure>\n\n\n\n
                      \n
                    • Desempenho da aplica\u00e7\u00e3o do duto de ventila\u00e7\u00e3o<\/li>\n<\/ul>\n\n\n\n
                        \n
                      1. Desempenho de isolamento t\u00e9rmico<\/li>\n<\/ol>\n\n\n\n

                        The wall of the super air duct is a centrifugal fiberglass board with low thermal conductivity (0.029 w \/ m \/ k at 24 \u2103 and 0.04 w \/ m \/ k at 70 \u2103). In particular, the outer composite aluminum foil has a high heat reflection ability, and its strength and toughness are much better than aluminum foil, so it is not easy to break. Because the air duct wall is the insulation layer, the pipe adopts a tenon joint, T-shaped inner frame butt joint, and iron sheet plug joint (or outer flange connection), so that all parts of the air duct are evenly insulated without cold bridge phenomenon, and has good thermal insulation performance. However, the galvanized iron sheet air duct and the inorganic glass fiber reinforced plastic air duct have no heat preservation performance, so the heat preservation layer and the heat preservation protective layer should be added. What Is The Ventilation Duct<\/p>\n\n\n\n

                        2. Desempenho de fogo<\/p>\n\n\n\n

                        Super air duct is based on non-combustible glass fiber cotton board, using self-made flame retardant adhesive (national patent), aluminum foil cloth, and glass fiber cloth are compounded on both sides of the substrate. Therefore, the finished duct belongs to non-combustible material, which conforms to grade A of GB8624-1997 “classification method for flammability of building materials”, and has good fire performance. The galvanized iron sheet air duct and inorganic glass fiber reinforced plastic air duct are non-combustible materials, but whether their thermal insulation materials burn depends on the material. Originally, polystyrene board was used as an interlayer, because it would produce toxic gas under the effect of an external fire source, so it was gradually eliminated. At present, non-combustible insulation materials such as centrifugal glass wool are usually used as the interlayer. Due to strength and other problems, the product quality is not very stable. What Is The Ventilation Duct<\/p>\n\n\n\n

                        3. Desempenho de elimina\u00e7\u00e3o de ru\u00eddo<\/p>\n\n\n\n

                        The wall of super air duct is a kind of porous sound absorption material, which has good sound absorption effect for medium and high frequency sound waves. Some data show that the noise elimination capacity of super air duct can reach 18 dB \/ M ~ 21 dB \/ m when the medium frequency is 1 000 Hz ~ 2 000 Hz and the pipe diameter is 500 mm ~ 320 mm. It is a very good pipe type noise eliminator, which can eliminate the primary noise from air-conditioning equipment and the noise from valve body, valve body and air-conditioner With the extension of the pipe, the effect of the secondary noise produced by the pipe fittings is more obvious, so the special muffler can be omitted. However, the galvanized iron sheet air duct and the inorganic glass fiber reinforced plastic air duct have no noise elimination performance, so the muffler should be added. What Is The Ventilation Duct<\/p>\n\n\n\n

                        4. Resist\u00eancia \u00e0 umidade<\/p>\n\n\n\n

                        There are no perishable materials and components in the materials used for the super air duct. The outer surface of the air duct is made of moisture-proof aluminum foil cloth. Its moisture permeability is 0, and it has a strong anti-corrosion ability. The water absorption rate of fiberglass board is not more than 2%. When the pipe is in a humid environment for a long time, its noise elimination and heat preservation properties will not change. Because it is a porous material, it is necessary to prevent the pipe interior, pipe end, an incision from being soaked by water for a long time. The galvanized iron sheet air duct is easy to be affected by moisture, corrosion, and rust, which is more serious when conveying air for air conditioning with large moisture content. Especially when the air duct is made, the galvanized layer at the iron sheet bite is damaged, and it is not easy to make up an anti-corrosion treatment. There will be condensation at the place where the cold bridge is produced, which will cause corrosion to the pipeline, thus affecting its overall life. Due to the restriction of raw material ratio, the stability of moisture-proof ability of inorganic FRP air duct is poor. What Is The Ventilation Duct<\/p>\n\n\n\n

                        5. Vazamento de ar<\/p>\n\n\n\n

                        De acordo com a especifica\u00e7\u00e3o, o volume de vazamento de ar do duto de ar deve ser calculado de acordo com a porcentagem do volume de ar do sistema de acordo com o comprimento e a estanqueidade do duto. A taxa de vazamento de ar do duto de ar deve ser 10% (para suprimento geral de ar e sistema de exaust\u00e3o). O super duto de ar \u00e9 conectado por fenda, espig\u00e3o e colagem, e a junta \u00e9 vedada por fita de alum\u00ednio. O vazamento de ar do duto de ar n\u00e3o refor\u00e7ado \u00e9 basicamente 0, a taxa de vazamento de ar do duto de ar refor\u00e7ado n\u00e3o \u00e9 superior a 1% e a taxa de vazamento de ar do sistema n\u00e3o \u00e9 superior a 2%. Quando a press\u00e3o est\u00e1tica no tubo \u00e9 500 PA, o vazamento de ar por unidade de \u00e1rea do duto de ar \u00e9 inferior a 118 m3 \/ h \u00b7 m2.<\/p>\n\n\n\n

                        6. Peso<\/p>\n\n\n\n

                        O peso do volume do superduto \u00e9 de 64 kg \/ m3, e o peso por unidade de \u00e1rea \u00e9 de 2,8 kg \/ m2 (espessura) \u03b4 = 25 mm, incluindo o peso do suporte de suspens\u00e3o (1,5 kg), que \u00e9 o mais leve de todos os tipos de materiais de duto. O peso volum\u00e9trico da conduta de ar em chapa de ferro galvanizado \u00e9 de 7 870 kg \/ m3 e o da conduta de ar em pl\u00e1stico refor\u00e7ado com fibra de vidro inorg\u00e2nico \u00e9 de 2 100 kg \/ m3.<\/p>\n\n\n\n

                        7. Resist\u00eancia ao atrito<\/p>\n\n\n\n

                        A parede interna do superduto de ar \u00e9 feita de tecido de fibra de vidro e a rugosidade da superf\u00edcie \u00e9 de 0,2 mm, o que \u00e9 um pouco maior do que o valor medido do duto de ar em folha de ferro. Quando a velocidade do vento no duto de ar \u00e9 inferior a 15 m \/ s, a resist\u00eancia ao longo do caminho \u00e9 inferior a 7% em compara\u00e7\u00e3o com a da chapa de ferro (incluindo a resist\u00eancia aumentada pela haste refor\u00e7ada no duto de ar), Em ventila\u00e7\u00e3o geral e duto de ar condicionado, a resist\u00eancia ao longo do caminho \u00e9 respons\u00e1vel apenas por cerca de 10% da resist\u00eancia local (a resist\u00eancia local do superduto e duto de ferro galvanizado \u00e9 basicamente a mesma), ent\u00e3o a resist\u00eancia de ventila\u00e7\u00e3o aumentada do duto de fibra de vidro \u00e9 inferior a 1% em compara\u00e7\u00e3o com duto de ferro, que n\u00e3o tem impacto \u00f3bvio em todo o sistema de dutos e pode ser ignorado. A resist\u00eancia ao atrito do duto de FRP inorg\u00e2nico \u00e9 maior do que a do duto de folha de ferro, que \u00e9 pr\u00f3xima \u00e0 do duto de placa de fibra de vidro composta.<\/p>\n\n\n\n

                        8. Capacidade de blindagem do duto de fibra de vidro<\/p>\n\n\n\n

                        A parede interna do duto de fibra de vidro composta \u00e9 feita de tecido de fibra de vidro composto, que tem a capacidade de proteger a fibra de voar. Na condi\u00e7\u00e3o de 15 m \/ s de velocidade do vento na conduta, a fibra da parede interna da conduta n\u00e3o cai, o que cumpre integralmente as normas sanit\u00e1rias nacionais e garante a qualidade do ar interior e do ambiente.<\/p>\n\n\n\n

                        \"duto
                        <\/figcaption><\/figure>\n\n\n\n
                          \n
                        • Efeito da aplica\u00e7\u00e3o e perspectiva do tubo de ventila\u00e7\u00e3o<\/li>\n<\/ul>\n\n\n\n
                            \n
                          1. Conduta de ar em chapa de ferro galvanizado. Como um tipo de tubo de ventila\u00e7\u00e3o tradicional, geralmente \u00e9 adequado para projetos de HVAC com baixos requisitos para as condi\u00e7\u00f5es ambientais. \u00c9 adequado para o transporte de g\u00e1s seco e n\u00e3o corrosivo. Em uso, devido ao grande ru\u00eddo e o efeito de isolamento n\u00e3o pode durar muito tempo, a longo prazo, pode ser substitu\u00eddo gradualmente por tubos de ventila\u00e7\u00e3o de novos materiais.<\/li>\n\n\n\n
                          2. Duto de ar FRP. \u00c9 um tipo de tubo de ventila\u00e7\u00e3o posterior ao duto de ar em chapa de ferro galvanizado. Possui as caracter\u00edsticas de preven\u00e7\u00e3o de inc\u00eandio e resist\u00eancia \u00e0 corros\u00e3o. \u00c9 adequado para engenharia HVAC a\u00e9rea externa e ambiente corrosivo. Sua apar\u00eancia tem sido favorecida por muitos consumidores. No entanto, em vista do efeito real \u00e0 prova de umidade do duto de ar de FRP, e o desempenho geral da qualidade n\u00e3o atingiu o efeito esperado, e porque seu pre\u00e7o \u00e9 calculado por peso, este m\u00e9todo de precifica\u00e7\u00e3o irracional torna o pre\u00e7o mais caro do duto de ar de FRP n\u00e3o diretamente proporcional ao seu valor real, portanto, o n\u00famero de usu\u00e1rios diminuiu nos \u00faltimos anos. Com o desenvolvimento da economia de mercado, o material e o pre\u00e7o do duto de ar de FRP devem ser alterados a fim de obter espa\u00e7o de sobreviv\u00eancia e desenvolvimento de longo prazo.<\/li>\n\n\n\n
                          3. Duto de fibra de vidro composto. \u00c9 um novo tipo de tubo de ventila\u00e7\u00e3o que surge e utiliza nos \u00faltimos anos. Gradualmente, tem sido aceito pelas pessoas e ocupa uma fatia maior do mercado. Seu desempenho geral \u00e9 mais vantajoso do que o tubo de ventila\u00e7\u00e3o anterior e seu design \u00e9 mais cient\u00edfico e razo\u00e1vel, mais humanizado. N\u00e3o \u00e9 apenas f\u00e1cil de instalar e usar, mas tamb\u00e9m tem melhor desempenho, aplicabilidade econ\u00f4mica, elimina\u00e7\u00e3o de ru\u00eddo, preserva\u00e7\u00e3o de calor e economia de espa\u00e7o. Pode ser amplamente utilizado em diferentes ambientes e tem uma longa vida \u00fatil, por isso tem um espa\u00e7o de desenvolvimento de longo prazo. Com o progresso cont\u00ednuo da ci\u00eancia e tecnologia e a melhoria cont\u00ednua da compreens\u00e3o das pessoas, ele se tornar\u00e1 uma esp\u00e9cie de tubo de ventila\u00e7\u00e3o universal e ocupar\u00e1 um espa\u00e7o de mercado maior.<\/li>\n<\/ol>\n\n\n\n

                            Em uma palavra, o duto de ar de placa de fibra de vidro composta tem as vantagens de elimina\u00e7\u00e3o de ru\u00eddo, preserva\u00e7\u00e3o de calor, preven\u00e7\u00e3o de inc\u00eandio, resist\u00eancia \u00e0 umidade, pequeno vazamento de ar, desempenho est\u00e1vel, aplicabilidade econ\u00f4mica, etc. em diferentes lugares, de acordo com diferentes requisitos, todos os tipos de os dutos de ar ter\u00e3o seus usos. Tem as vantagens de material leve, f\u00e1cil manuseio e suspens\u00e3o, modifica\u00e7\u00e3o conveniente no local, f\u00e1cil constru\u00e7\u00e3o, montagem conveniente, menos pontos de conex\u00e3o a serem vedados, economia de espa\u00e7o de instala\u00e7\u00e3o, alta efici\u00eancia t\u00e9rmica, opera\u00e7\u00e3o silenciosa, longa vida \u00fatil, desempenho ideal rela\u00e7\u00e3o de pre\u00e7o e baixo custo abrangente. Fortalecer a pesquisa e aplica\u00e7\u00e3o de novos materiais e novas tecnologias de tubos de ventila\u00e7\u00e3o de ar, para que possamos melhor nos adaptar ao mercado e captar o mercado.<\/p>","protected":false},"excerpt":{"rendered":"

                            What Is The Ventilation Duct What is the common ventilation duct in the ventilation and air conditioning system? What are<\/p>","protected":false},"author":1,"featured_media":11414,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[200],"tags":[182,202,203,180,201],"class_list":["post-11402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ventilation-duct","tag-hvac-air-duct","tag-iron-sheet-air-duct","tag-rectangular-duct","tag-round-duct","tag-ventilation-duct"],"jetpack_featured_media_url":"https:\/\/duct.harsle.com\/wp-content\/uploads\/2021\/06\/What-are-the-properties-of-ventilation-ducts.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/posts\/11402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/comments?post=11402"}],"version-history":[{"count":0,"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/posts\/11402\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/media\/11414"}],"wp:attachment":[{"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/media?parent=11402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/categories?post=11402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/duct.harsle.com\/pt\/wp-json\/wp\/v2\/tags?post=11402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}